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Heating Ventilating and Air Conditioning

~8300 answered questions
Parent Category: Home Improvement
Heating, ventilating and air conditioning (HVAC) refers to a system used in designing automotive or indoor environmental comfort. It uses ventilation air ducts to provide cooled or heated air to an automobile or a building through outlet vents.
There isn't a big danger if it isn't in use. The only danger would be if they fell and hit themselves on it. You'll just have to watch them carefully around the wood stove and teach them not to run around it and to be careful. Kids can learn at a really young age the proper behavior around different…
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its a type of connector thatstends to fall off in most cars you will probably notice the air is mostley comming out of the defroster that's usually located in the dash.
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probably hvac mode door stuck (foam or other) or mode door actuator broken - (cheap plastic) - this is an ugly job - find someone who has removed the dash in this type of vehicle before - set aside 300 bucks or more :( probaly just needs a blend door acuator.gmjim ANSWER Air door controlled b…
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The best way to keep the foul smell out is to open windows and use fans to bring in a lot of fresh air before the AC is started. Keeping the AC room clean is also equally important. Regards, Be-Cool Expert       Check your muffler and exhaust pipe for holes and also check your m…
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Automobiles: COLD TO HOT or if you want to be technical between 62+- to 92 +- Fahrenheit on average. if its too cold the heater obviously isn't working, but may I suggest first looking at your heater controls to ensure the temperature dial is set to warm (THE RED PART OF THE CONTROL) Homes: When…
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The 1998 have had a history of a bad heater box blender door operation. I am currently in the process of looking to buy this exact same door. However, I am not had any luck in finding this door. I am being told at the moment that I have to buy the entire heater box (includes the blender door). The c…
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On most all cars you have a selector control on the dash for selecting the different options such as floor, defrost, panel, mix, and so forth. This control depending on the car operates a flap/s near the heater that sends the air in the direction you select. Some use a cable to do this and others u…
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On top of the battery box is a small electical connection box with fuses. I had an issue with the first fuse on the left. It had a bad connection which had melted the plactic fuse box due to the bad connection. I cleaned the connection and the fuse terminals and then reinserted the fuse. It was a qu…
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Check the vacuum hose under the hood. May have a leak or have been disconnected.   Also check -The blower - this includes its motor, fan and associated components/wiring. Next to check is the coil (this looks like a small radiator) through which the blower moves air is clogged. Check if the v…
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Joyce, This is not too unusuall. The AC compressor puts quite a load on an engine, especially a smaller engine like a 4 cylinder. I wouldn't worry too much about it. . John In Montana With mine, it's because of the engine mounts. I still have to get one replaced. Before I had one cracked engine mo…
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In most all cases blown fuses are caused by a short or to much current being drawn thur it. Say for example if your ac fan quits when the fuse blows I would suspect a bad fan motor or a bad fan switch. In other words what ever this fuse is feeding is most likely bad or going bad or someone may have …
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Have the A/C lines checked for leaks.
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Have you checked the belts? A squealing sound can indicate a loose or worn belt, or slippage of one. If it is a "whine" it is probably the compressor, which could run for a long time or it could give out tomorrow.
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%DETAILS% Answer Hey Keitha==There are several reasons that it ould be. One, the compressor may not be turning and two, there can be too much refrigerant which will cause it not to cool. Three it can be the cycleing switch not engaging the compressor. It just has to be looked at by someone th…
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It can be a vacuum problem. Check to see if there is vacuum going into the cab. Check for a pinched hose or one that is soft and collapsed.
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There is a drain under the hood on the passanger side of the firewall. It is either a hole in the evaporator case or just a raised place that has stopped up. Use a rounded tipped instrument to unclog it because the evaporator is about one inch above the case and can be damaged with a sharp pointed o…
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I have a 1994 caprice 5.7 liter v8 with two cooling fans. The second one is only supposed to come on when the a/c is running. It does not due to the Engine Control Module (computer brain) not telling it to. The fan was tested with a direct wire and it works fine. The options are to replace the ECM …
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Answer It could be any of a number of reasons. Such as: You are out of freon. Your compressor doesn't work. Really the only thing your light being on is telling you is that the fuse isn't blown. And your heater has nothing but the blower motor and duct work in common with the air conditioner. I …
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%REPLIES% Answer Hello Bethany I am currently the owner of a 1996 Saturn with 76,000 miles on it and I am having similar problems. First of all I will describe the problems I am experiencing and then I will tell you what I have figured out. When I got the car it was a nice cool day for Ju…
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R12 is almost impossible to buy, unless you go to a large-scale auto parts supplier like Napa. They won't sell it to you unless you are a certified A/C technician. You can buy R134a easily at other auto-parts stores, but be careful! If your car's A/C system is depleted of all refrigerant, you have a…
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remove it carefully... pull the bolts... do not cut any freon lines... that's illegal in the epa's book.... i personally havent read it... if you should accidently cut any lines.. don't inhale the freon... it could really mess up our lungs
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It depends on what part of the country you live. Call a couple of local shops and get some estimates.
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An air conditioner is a device which uses a special type of substance which readily changes from its normal gas state to a liquid one (Typically freon or another refrigerant such as R-20 [chloroform] or R-134 [tetrafluoroethane]). The gas is contained in a closed circuit of pipes connected to a pump…
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Rubber oder coming from vents maybe caused by you're blower motor.If this is the case it should bemaking a growling sound or asqueeling like noise. If this is the case you're squirel cage maybe rubbing. Leaving a burningsmell. Pull the blower motor out and look at it there should besigns of ware on …
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Hey Jennifer==Simply take the hose off and replace it. Then evacuate the system and add refrigerant. GoodluckJoe
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It can be a number of things. First check the fuses then make sure the blower motor is operative. If all checks ok, take it to a garage.Let's not assume an a/c problem if the air is not blowing. This is usually due to a burnt out blower motor resistor. The various speeds of the blower are controlled…
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Hey Dwayne==The fan is thermostatically controled if it runs long it must need it. GoodluckJoe   Yes. From my experience with an identical year/model Passat, the fans will run at high speed in traffic. The fans are set to come on automatically as soon as the AC is turned on, since the AC cond…
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CHECK TO SEE IF ITS A BURNT POWER RESISTOR LOCATED INSIDE THE AIR DUCT ON THE LEFT SIDE PASSENGER FOOT WALL.............   I took mine into the dealership and a blower resister had gone out. it was a recalled part and was repaired for free
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Answer you may need to replace the pressure switch. it just unscrews and screw on the new one. it costs about eight dollars from the dealer and is most likely the problem. Go to www.aircondition.com/tech and perform the self test using the steps (1-6) indicated. This may eliminate the problem.
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Hey JC==Parts stores have cans of 134 freon with a hose attached. The low preasure valve is either on or close to the receiver dryer or the can looking shiney thing by the evaporator. If you get too much in it, it won't cool as well.GoodluckJoe Before you assume it is out of refrigerent, check t…
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Hey A== The price varies throughout the coumtry. Time and knowledge is all a mechanic has to sell. He has to put groceries on the table also. You might call a couple of local garages for estimates. GoodluckJoe
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It could need freon. and you can do it most auto part stores carry it so does walmart
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You have to know what you are doing and have gauges and a fill hose.Go to auto part store and buy a hose with a pressure guage and a can of correct freon for your make and model.Turn on the A/C unit and find the low pressure side. With the A/C on it will be on the cold side. The valve should be on o…
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Yes, if there are two cooling fans one operates off of engine coolant temp. and the other operates off the A/C. The one that operates off of coolant temp will run for a while then shut off, then run again and continue to cycle. This is to keep engine at operating temperature. The other one runs when…
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Reverse the procedure you will do to remove it.Have the freon (if not empty) professionally removed by an AC serviceman. Then remove the drive belt. Then remove the freon line(s)and electrical connection from the compressor. Then unbolt and remove the compressor mounting from the engine.htere is muc…
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I have a 96 Apire and I am having the same type of problem, my blower will sometimes work and other times it will not work. I believe that the blower speed switch (the knob with off 1 2 3) is going bad. I ordered one form my local Ford Dealer and was told that this part is now Obsolete. . Tim
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It depends on what is wrong with it. Take it to a good garage.
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To service a/c's you need gauges and a refrigerant recovery system.
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It is either out of freon or the compressor isn't comming on for some reason. Takeit to a garage. Might also be the temperature blend door is stuck in the full-heat position. See "Related Questions" below for more about diagnosing / fixing that problem
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%DETAILS% Answer It appears that it is low on freon. Did you evacuate the system??? Take it to an a/c mechanic. Answer could be the "head unit" or A/c contols in the dash.
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You need a refrigerant recovery system and gauges to do it properly.
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A resistor block controls the speed of the AC/Heater fan. These resistors are switched on and off in various combinations to create the different fan speeds. When the resistors burn out, your fan will only work on the "HI" setting. The "HI" setting doesn't use any of the resistors and that's why it …
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Stealing will get you in the slammer but if you want to know how much it will cost, call a couple of local a/c installers which you can find in the yellow pages.
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I was told that my 2000 tracker kept blowing the a/c fuse because I had a bad ground somewhere. I just don't care for a/c so I never tracked down which green wire had a bad connection.  A/C 2000 Tracker adviceGo to--> a site called; justanswer.com-- It is well worth the trouble and you get…
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The compressor Low Level Switch has tripped because you need Freon, this will stop the compressor until the system is recharged. Also, you need to check for a leak in the system. Otherwise your compressor is bad.Another idea: On the accumulator ( I think that's the what it's called) Silver unit unde…
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NOTE:The Owners manuals have detailed illustrations and information regarding the two fuse blocks / panels, and the various vehicle systems each fuse connects to.  Ford makes all the Owners Manuals for their entire lineup, 1996 and newer, available online:www.fleet.ford.com/maintenance/owners_…
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I'm not really sure what you mean but if you need to drain it and the tap on the bottom is stuck, undo the clamp on the lower hose and drain it into a pan. If you meant the core is clogged, you are pretty much out of luck. Try an autoparts store for radiator cleaning solution or mix 50/50 water and …
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I just finished replacing the cabin A/C filters on my 2001 Honda Accord. The two filters are located just behind the glove compartment. The hardest part of replacing the filters is removing the glovebox. So, here is the web address I used for assistance in removing and replacing the filters on my Ac…
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%DETAILS% Answer The compressor cycling on-off is usually an indication of low refrigerant level, which in turn means that there is a leak in the system somewhere.
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May be a vacume hose leak. Mine starts on regular AC. mode then from an Idle like at a red light it will switch over to "re-circulate"mode and start blowing warm air. While still showing in normal AC. mode. After I pull out and step on it it reverts to normal operation, and cools down. I  I h…
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Answer I believe there is a vent in side of the glove compartment, you can open and close it there. Slide it from side to side. Answer Possible programmer malfunction needs to be checked out.
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%REPLIES% Answer Take it back to the dealer. Answer The AC drain is Blocked OR the Heater Core is Leaking.
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All car ac's work like most any other ac. I don't know of any car ac's that work like heat pumps that both heat and cool. Every car I have seen provides heat thru a heating core which is heated from the water circulated from the engine. , EzForJesus
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Answer there is probably a low refrigent (leak someware) issue Here are responses: Several things could be the cause. Low coolant. Heater valve. The belt. The compressor. Check these in the order shown. You most likely to need a new temperature control switch in your heater/ac. This is the swit…
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Try recharging it as a start, which is something you can do at home. If it doesn't work after that, take it to a service tech and have it tested for leaks.
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%REPLIES% Answer Thermostat stuck open or heater core plugged. Answer CONSIDER THE POSSIBILITY YOUR HEATER VALVE IS CLOSED/CABLE RENDERED INOPERATIVE BY A BROKEN PLASTIC SLIDER HOUSING,AS IS OFTEN THE CASE ON OTHER MODELS/MAKES,SHOULD IT NEVER WARM UP.
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On the compressor there should be a plug that is pluged into the compressor. Try to unplug it and then try the ac... Now if that dont work just take the belt off the ac BUT make sure there is stll a belt that runs the altenater and water pump. that will bypass it but try to unplug it first so you wi…
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Air Condition fan motor only works on speed 4 or works all the time Symptoms:-A/C Fan motor works only in the 4th. Speed. -A/C Fan motor works all the timeSolutionThe most common solution for this problem is the "Fan Resistor". This resistor control the A/C fan motor and is located next to the fan m…
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If you reach under the drivers side of the dashboard, just above the gas pedal, there is a control cable. If you turn the distribution knob and the end piece doesn't move at all then the housing for the cable has broken. It's just a plastic clip so it breaks easily. If you take some tape or super gl…
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the contour has problems with the blower motor switch and the resistor. I would check the resistor connector for signs of melting.
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I believe the unit inside the air cleaner assembly is the ecm. Electronic control module/ car's computer.
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to your problem. Had a similar problem, and well, still technically do, but it's in the process of being repaired now. On the center of the firewall in the engine compartment (engine rear), you will see a fan blower unit with a 3" long rubber hose and an electrical connector with 2 wires - 1 purple …
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Plugged heater core maybe.   Maybe the thermostat. Coolant keeps your engine cool under duress. If the thermostat is stuck open, the engine is staying too cool. Your heat is run off of your engine temperature.
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Several possibilites. I assume you mean the gauge reads normal, but temp is cold. Cooling system was not bled well when thermostat was changed. Thermostat went bad. New thermostats are not uncommon to be defective. Developed coolant leak and level is now low. heater core plugged up from lack of flus…
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Try taking the car in for a rad flush. You may have a restriction. Check also that the hoses are not kinked, block heater and rad.
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If the AC system has been opened as in a condensor coil replacement, hose replacement or for any other reason then the system must be evacuated. This is done using a vacuum pump. All the air must be removed prior to recharging with new gas, (freon, ect.) best bet is to have it performed by a qualifi…
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It is easiest if the gas line and the electrical outlet are already set up in your home. At that point, it is easy to set up the appliance. When hooking up a new or used gas appliance it is required that you use a new gas line. I always try to use a flexible line and make sure it is extra long so …
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First check the thermostat to see if the engine i sheating and cooloing properly. Next check the Heater core, it may be plugged up. You should also take a look at the intake gasket to make sure it isn't leaking coolant into the engine. First check that the water level isn't low. But my bet is th…
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First, you figure out which of the 15 things that could go wrong with the air conditioning system has, then you can ask a question as to how to fix that one thing.
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Duck Tape Go to a home depot or lowes and buy aluminum peel and stick tape for a perm. repair
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It probably has a small leak somewhere. You need to take it somewhere and let someone check it and probably need a charge of R134.
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Answer: Electric strip heat has virtually no maintainance, but is the most cost inefficient source of heat there is. The heatpump will save you some $ on operation but is usually supplemented with an electric strip that operates while the HP is in defrost mode anyway. Also the HP is a mechanical de…
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These recommendations depend on the height and size of the room, the season, and the activity taking place in the room. Keep in mind that warm air rises to the top and cold air settles on the bottom. Air settles in layers from warm at the top to cold at the bottom, if left alone at equilibrium. Cei…
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I had a problem with a noisy hunter fan last month. After going to similar post like this one, I found this site www.fanshack.com and ordered a bottle of fan motor oil (I know it sounds funny) but it cleared it right up. I couldn't find this oil at lowes or home depot for the life of me. Anyways, tr…
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If I was upgrading, I would install a 200 amp box so there would be adequate power in the future. You should upgrade to a 200 amp service even if your local code does not require it. This will allow you or future owners to upgrade or install new circuits as needed. Also, if you are renovating a…
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%REPLIES% Answer Actually I have experienced this problem, as I bet have a lot of other people. An AC uses a large amount of electrical current. Whenever it switches on it causes a temporary power drain and lights will often dim or flicker. My neighbor is a retired electrician from Boeing Ai…
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No Of course you can. There are worldwide distributors of these chemicals. However, there are limitations on new manufacturing and importation, so substitutes are being found. Freon is a brand name for CFC Refrigerants so the question in the US is are you EPA Certified-- then is it cost efficie…
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Answer for USA, Canada and countries running a 60 Hz power supply service. An appliance designed for 240V absolutely must have a 240V outlet installed for it; there is no way to properly power it with 120V. If you aren't able to install a 240V outlet yourself, you should contact an electrician. Yo…
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Answer in-rush amp draw of a a/c is a lot. make sure wire size/breaker size are correct as well panel is large enough to handle a/c If the lights throughout the house dim, there is likely a problem in the feed to the house. This can be due to poor or loose connections that handle moderate steady…
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You live in a mobile home, or older house? I live in a doublewide, and my dryer breakers are 30amp, and the water heater breakers are 20, both 220V lines, shared. The only safe way to answer this is to have an electrician look at your setup and determine if your wiring is capable for allowing a larg…
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Let do some easy mat. Load is 2.2 KW. 220 heater uses 10A (220X10 = 2200 W = 2.2 KW) 110 heaters use 22A (10X22 = 2200 W = 2.2 KW). Electricity companies charge per Kilowatt, so, theoretically, you pay the same. ------- You pay for the energy you use, and that is measured in kilowatt-hours. So i…
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You really cant do it because a 220 has a heating element in it to dry the clothes unlike gas that uses fire to dry the clothes and the 120 is to turn the drum.Your drier will keep poppin breakers which isn't good at all. Outlets and Power (110V outlets and 120V outlets are practically the same for…
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%DETAILS% Yes, fuel consumption will increase with use of your AC system. Your serp belt is only turning a free-wheeling pulley on the front of your AC compressor. When you request AC, an electric clutch behind the AC pulley engages, then your serp belt is turning a demanding compressor. This exc…
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%DETAILS% There is no noticeable loss in mileage, certainly none in coolant of using a/c at 60% capacity versu 100% capacity.   It depends on which car you have. Some just mix in hot air to make it warmer. Other's shut off the compressor after the internal temperature has reached a certain…
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Fixing a leak You should first check fan vent outlet on roof - should have a flapper of some kind that may be stuck open or have a hole in it. If it only leaks when it is raining that is first clue. One other possibility is the vent pipe is running through cold attic causing condensation - you can w…
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Yes, the baffle is choking off the vent, causing the toilets to flush slow.
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Low Water Pressure The further away your taps are (example: the bathroom) the less water pressure you have. If you have a lot of trees around your property I suggest getting "Rotor Rooter" in to clean out your pipes. Especially in an older home the pipes can have all sorts of odd things in the…
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You need to replace the aluminum anode with a zinc/aluminum alloy anode. ANS 2 - If a hydrogen sulfide (or rotten egg) odour exists around your water, it's often an indicator of excess iron in the water supply. This can be bad for your plumbing. I would advise taking a water sample(in a sterilised …
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Go to your plumbing or hardware store, and you find a special tool for this job which resembles a large socket or wrench.
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Playing with closed hot water heating systems is dangerous and can result in serious personal, and property damage.If you are determined to do the work yourself, you need to study the subject more.
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Is the furnace a hydroponic system? If it is you only need to get a heat exchanger (As you don't want the water to your heater flowing through the furnace) and plumb it as another zone in your house. If not you need to find a device for heating water that fits your furnace. and plumb the heat exchan…
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I found an article on a website with information on central air conditioning prices click the link.
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With air conditioning systems, the equipment runs at peak efficiency when it operates for long periods. Cooling your house back to the comfortable temperature will use less electricity than the unit would use cycling on and off for short periods to maintain the set temperature. If your house takes t…
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RE: AnswerThe Energy Efficiency Rating (EER) rating. If it is MORE than 10, do NOT buy it. The lower the number, the better, and the less electricity it uses. This is not true. The opposite is true. The lower the EER, the LESS efficient!
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Update: Evaporative cooling is just that... using a liquid to cool a space by evaporating the liquid. You can effectively cool air down to the dew point temperature (100% saturated) for given initial conditions. These work best in dry climates. See a psychometric chart for more information. The liq…
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Answer The U.S. Department of Energy provides a fact sheet at Cooling Your Home Naturally that will provide you with information on how to reduce or replace the use of an air conditioning system by using nonmechanical ways to keep your home cool when it's hot outside. Install a Radiant Barrie…
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Clay and concrete tiles are great for hot weather because they can circulate air under the tiles but they are not optimal for colder climates. Metal roofing is a great choice to help regulate your home's temperature. They reflect sunlight in warm weather & absorb UV heat in the winter to help me…
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