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Car Heaters
A car heater is a device used to heat the engine of a car, especially during cold weather. Commonly used in the northern US states, Canada or Scandinavia, the device warms up the car’s body and system for easier starting.
1,180 Questions
Why does the heat blow cold while idling and warm when driving?
Poor circulation probably due to a restricted (plugged up) heater core.
Why is your car overheated but radiator full of water heater blowing cold air and knocking sound?
Have you checked your thermostat?
need new blower motor...
Why does 2001 Grand Cherokee's heater blow cold?
The most common problem with heat on these cars is a broken blend door. The dealership will want a fortune to repair it but there is a do it yourself alternative kit out there called the Heater Treater. Check them out on google and ebay and go to the site for full diagnosis and info. hope this helps!
check the thermostat to see if it is opening properly (you can remove it and place it in a pan of water on the stove and heatthe water until it opens oh yeah don't forget to use a thermometer to find out what temp. it was) you should also check your antifreeze mixture for accurracy(try that first) if none of these work try flushing your heater core to see if it is stopped up
This could be an indication that you do not have enough antifreeze. The car heater will not work when there is no liquid in it. also the car will overheat.
Name different sources of heat?
one very short list: 1) the sun (basically a fusion reactor for this consideration), 2) burning things (combining almost anything with oxygen and an ignition source [like a match] like wood, oil products, magnesium, and a long list of others), 3) most fissionable material, 4) electric current through a resistive wire, 5) any exothermic chemical reaction (a very long list, including biomass, food digestion, muscle movement), 6) physical work like friction,
What could be wrong if a car just stops running and you have to let it sit for about an hour?
Could be a fuel system problem. First thing is to replace the fuel filter and then have the a fuel pressure check done. Also some electrical parts will fail after they get hot. An engine requires 3 things to run. Fuel, air, spark. Find out which of these you do not have when it will not start.
Ihave a 1998 ford pickup it blow warm air from my heater I chang thwrmostat it still blows warm air?
The thermostat is not the issue. The thermostat regulates the engine temperature, but not the heater core temperature.
There is a valve going to the heater core that is not closing all the way. It may be broken, clogged, or not actuating.
What are plenum doors and where are they located in the heating system for a 1995 Ford Explorer?
The plenum door is inside your heat/AC system near the heater core. It opens and shuts incrementaly to allow the heater core to heat the air passing by, or closes to keep passing air from heating at all. If you open the glove box on a 95 explorer, you can see the plenum motor... and you should be able to see/hear it moving as you adjust the temperature control dial from cold to hot.
This is probably due to low coolant in the header tank for the radiator.
While the engine is cold remove top on bottle this is the one that is connected to rad by hoses bottle is the small one right hand side of engine looking from the front .
Top up until mark on bottle if water goes down replenish .
Heater should then blow hot air.
DO NOT REMOVE TOP UNTILL ENGINE COOLANT GOES COOL OTHERWISE PRESSURE MAY SCOLD YOU.
Good Luck
I had a similar issue occur with my Acura TL. According to the dealership the fillament on the driver seat went bad while the one on the passenger seat was still functional.
How to fix Holden jackaroo heater?
This depends on what is wrong with it. You will have to specify the problem first to get help with it.
Where is the heater blower in a 1992 LeBaron?
See that huge long black thing under your console, with all the air vents and colored plastic vacum lines attahed. It's in there, on the passenger side. Yep, the whole darn thing has to come out. They claim the console doesn't have to be removed; you cut a section out by the glovebox, but don't believe it (if you have the convertable) There is steel bracing in the center console which will 'catch' it a you try and slide it out.
I replaced mine and only have 5 left over parts! Not bad for a rookie. Worst job I ever had.
Fiesta heater blows cold air only?
very common problem it seems, there is a relay, under the bonnet,centrally located,just under the windowscreen. controls the heat. this is commonly at fault, and simple to change
Does antifreeze help to warm the car in the winter?
no, anti freeze doesnt warm a car up, the purpose of anti freeze is to keep your down at a certain temperature. the engine bock creates the heat the anti freeze keeps it at a certain temp. most of the time between 180-195 degrees
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When parked, anti-freeze lowers the temperature at which your coolant would freeze- does not make the car warmer, it allows it to get colder without damage. It also RAISES the boiling point of the coolant, so that it can be 230 degrees, but not boiling.
What is wrong if your heater fan blows air but you get no heat in your 2001 Ford Windstar?
See "Related Questions" below for a complete discussion on possible causes and more importantly: fixes
Why would fuse 16 for the directional signals blow on a 2002 Mercury Grand Marquis?
If this is the case, try disconnecting the ac compressor. If not that, it could be in the 'master switch' (turn signal lever unit). Does anything else go out along with the turn signals? Does it only happen when you turn on the heater or ac?
Year, make and model would help but, it could be a faulty thermostat, a faulty temp blend door actuator, a plugged up heater core or the coolant system is low on fluid (leak).
Why is heat not blowing out when you turn the heat on in your car?
Car heaters need a few moments to warm up.
There are several things that can cause this problem with Jeep Grand Cherokees. The actuator (door motor) can cause this, the door could also be broken. There is an good article that goes into more detail - the link is at the bottom of this page. Often, the actuator motors are too strong for the plastic doors, and they break over time. The typical fix involves removing the entire dash and replacing the plenum assembly. There is a DIY kit by heatertreater that provides instructions on how to perform the repair without removing the dash.
I just started experiencing this same exact issue with my 2002 Jeep Grand Cherokee Limited on a road trip yesterday! It works as it should on the driver's side, but only blows cold air on the passenger side regardless of what temperature you set it on! Also, even if I completely close the passenger vents, some cold air still comes out from them and also from the floor area!
I had the same problem! Here is my cheap quick fix. Remove the glove box lid, there are 2 rubber retainers that hold it in place, just pull them out they are easy to put back, the lid will now drop down to reveal the the door motor housing, disconnect the electrical lead(Make sure you remove the neg lead on the battery first)Undo the 2 screws and then pull out the motor. A new motor cost me approx 100 pounds. If you do take my approach make sure you test the motor before you buy new as it could be some other problem. Once you have removed the motor it's easy to open and close the door by it's spigot, just to make sure it's not stuck in any way. My final test was to check for power to the electrical lead. Reconnect the battery. While turning the temp conrol check with a meter to see if there is power to the lead.
It sounds like you have aq problem with the right temperature door assembly. I have a similar problem with my 1999 Grand Cherokee Limited, but, in my case, the unit just blows cold air. The question is: How do you access these door assemblies to change them? Help! I am a do-it-yourself person and want to know where I can locate information about how to access the AZC system door assemblies to change them? I understand it involves removing the entire dash board in order to get access to the passenger side one that is broken. To do so I need some type of repair manual.
All I know is I have the EXACT same problem with by 99 jeep grand Cherokee. It started with one side blowing cold and the other blowing hot. Now, both blow only cold air. I took it to the dealer and they wanted to charge me $800 to fix it stating it was some switch that has been going out in all jeeps this model with dual heating system yet they would not consider it under warranty as a issue. Hence, I still have no heat.
I just had the problem on my 01' jeep grand the dealer told me it was a bad bun door and actuator on the passenger side at a charge of $1200.00. If your good with cars you can do the job yourself and I mean good this job was a pain in the butt the dealer est. 12hrs (plus u need to disc. the heater core and evap. for the ac) of their time it took me exactly that. Once I got the HVAC system out of the truck I noticed since the car is temp. control zoned the passenger Sid bun door which controls the flow of heat to the passenger vents was broke. The dealer was aware of the problem picked up a new part for $200 and slapped it back together worked fine( the actuator was not bad it just doesnt respond to a broken door so don't let them sell you one, you should only need a new bun door)
ANSWERThe problem is a wear out mechanism with the blend doors. The doors break and are stuck in the AC position...NO HEAT. There is a new product that solves the problem. Search on Google for "heatertreater" for a complete explanation of the problem and a solution.
"> "> "> ">The problem with the system is the design of the actuators. The failure of this so called" bun" door is due to the poor design of these actuators. Over torque and excessive wear leads to failure....The only way to resolve this problem is by replacing both actuators and the temperature blend door assembly. Do not just replace the door!!!! ( note: fresh air door has same problem) I average one grand Cherokee a week in my Cooling systems repair shop. 675.00 is my going rate. It pays 6.1 hours and nothing more...don't be robbed by the dealership and stay away from driveway mechanics. Beware that your entire instrument panel must be removed along with the evacuation of the refridgerant. Not a "do-it-yourself" deal! Good luck and never by a Jeep again!
"> "> "> ">Your failure description is the classic fail description for broken blend doors, and this is a common problem on the GC. There is an inexpensive DIY kit on Ebay from heater treater that will fix the problems without having to remove the dash panel.
The HVAC system is computer controlled and when the doors break, the computer senses that the movement of the doors is out of spec and shuts the motor down. Actually it is rare for the actuator motor itself to go bad. Usually it's a broken door combined with computer control. You can check the motor with a 9V battery and a snap connector. Just touch the wires to the motor terminals and check that it turns.
Another ExampleI just thought that I'd add my experience: I have a 1999 Jeep Grand Cherokee Limited 6-Cyl. About a year ago heat went out on passenger side (cold air came out on passenger side when heat was on and coming out on driver's side). Spring and Summer came, so I forgot about it. This Fall (maybe 1-2 months ago) I was reminded of the problem when the cold air came back. Now, about 1-2 weeks ago, all blower functionality is gone ... a real problem if you need to defrost the windows! I'm going to try the AZC test and look into the HeaterTreater. I'd hate to put any more big money into this vehicle as it has been a true money pit. I'll never buy another Jeep. It's a classy ride, but I've put more money into repairs for this vehicle than any other two vehicles I've owned.
Easy fix is available
There is a video available that shows the complete repair process and goes into an explanation of the root cause of the problem and the solution. You can also find the video by searching on YouTube. This is a very common problem on the Grand Cherokee and the kit gives a simple effective fix for the problem and is much much cheaper than taking it to the dealer.
Assuming you are going to replace the 99/04 Jeep Grand Cherokee blend doors yourself.
You would start by disconnecting the negative battery cable.
If you are going to remove the dashboard, etc to replace the blend doors.
some websites give you complete instructions with plenty of pictures.
It will take the average person with little or no auto repair skills approximately 12 to 16 hrs.
The vehicle will have to be taken to a shop that can recover the refrigerant before you start removing the dashboard and HVAC box..
If you are going to do the type of repair where you cut an access hole in the side of the HVAC box.
A short version of how the access hole repair is done.
Disconnect the Negative battery cable.
Lower the glove box
Remove the actuator motor - You will need a Phillips screw driver
Cut an access hole in the plastic HVAC box - Use a multi-purpose cutting bit, you will need a rotary type of cutting tool, like a Dremel, RotoZip, etc. Or you could do the cutting by hand with any type of small cutting tool, it will just take longer doing it by hand. Or some people have used a narrow pointed soldering iron!
Remove the broken blend doors
Install the new Blen Dor dual control blend doors.
Replace the actuator motor.
Close the access hole - Replace the wall piece of plastic you cutout -Use foam tape or an aluminum tape to cover the groove made by cutting the wall.
Close the glove box.
It is almost as easy as what you just read, the hardest and the most time consuming thing to do is cut the access hole.
The job should take between 30 minutes to 1 ½ hours. Depending on how long it takes you to gather your tools, etc.
Before you do anything major find you hvac fuse, pull it, then put it back. It might be in the fuse box under the hood or the one inside. All mine needs is to cut the power to the havc unit then it resets.
What could be wrong if your central air runs but blows no air?
I had same issue few years back....was a $12.00 relay on the side of my hydro heat system
Check the coolant level. You might just need a little extra anti-freeze. Thermostat may need replaced I just went through the same thing on my 98. If bleeding the air out of the system does not work try this. With the truck running check the temp of the coolant lines going to and from the heater core. (about 1-1/4" in diameter hoses that go to your firewall.) As you face the engine the left hose is the inlet hose and the right is the outlet hose. If the inlet hose is warm-hot to touch and the outlet hose is cool then you may have some blockage in the heater core. Now turn your heater fan off or to low speed and check the outlet hose again. If the temp is rising the you still have some flow through the core and may be able to flush the gunk out. I went to the hardware store and purchased a female garden hose replacement end that would fit a hose with a 5/8" ID. Take off the clamp that you would secure the hose with and just use the barb end to insert into your heater core hose. With the car off and the engine cool remove the right outlet hose from the waterpump. Then the left hose can be split at the union fitting that is about half ways to the heater core. Now you can try to flush the core. Insert the hose barb that you have purchased into the right outlet hose and move the left inlet hose away from the engine so that you don't spray water on the block or manifold. Turn the water on and flush the core. You will probably see some grey water come out of the inlet hose. Run till clear. Turn off the water. Remove the hose from the outlet hose and move to the inlet hose. Flush again with the water running in the opposite direction till the water is clear. I had to do this about 3 times till the core was clean. I did use hot water but I don't think that is a must. After you are done flushing replace the hoses and add coolant to the radiator till full. Start the engine and let it idle till the the thermostat opens. You should see the coolant rise and then fall in the radiator neck as the air is bleeding out of the system, replenish the coolant as it goes down. . While the system is bleeding you should be able to feel the outlet hose get warm. If it is you should have heat. Good luck and be careful.
