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Heating AC and Engine Cooling
Heating, air conditioning (AC) and engine cooling require a radiator to transfer heat. Heating a cabin requires heat to be transferred from an engine block. Engine cooling blows the heat out of the engine. AC uses refrigerants to cool air.
2,065 Questions
What would make an Intrepid heater blow cold air?
Could be low on coolant; could need a thermostat. In either case, the car is probably going to overheat if it hasn't alreasy done so.
AnswerI am having the same problem with my 2001 Intrepid. I had the thermostat replaced and it is still blowing out cold air. I was told that it could be that I need to replace my water pump. What do you think? AnswerI've noticed sometimes if the heat is blowing cold air. I set the air to cold and then after a second or two back again.. it seems that the "brain" if there is one doesnt set the vents right if you had it in heat from before. After flopping from heat to cold and then back again it starts blowing heat for me. Other then that I'd check your coolant.. could be low, could be blocked hoses, could be blocked heater core. (possibly having it flushed I could see helping if something is restricted.) The hoses could be weak and not flowing properly to the heater core. (I havent ever looked at one on a intrepid as mine hasn't given me that probelm yet) Most of the above is previous experience from other vehicles. I don't see how a water pump could be the probelm too much without the engine having overheating probelms too. Good luckHow do you bleed air from the cooling system of a 98 Acura 1.6 EL?
How do you determine a blown head gasket on a 1992 Mazda MX3?
Oil mixing with water?
Water mixing with oil? Run engine to normal operating temperature - remove dipstick and let a drop fall on hot part of engine - oil will smoke water will "sizzle" White smoke when driving down the road? Compression test - 2 adjacient cylinders have low reading
How do you remove the thermostat and put it back in the car?
follow the upper radiater hose to the top of the motor remove the housing and take out the thermostat be sure and remove all the gasket material clean and dry the housing and the area where the thermostat goes put on the new gasket and thermostat making sure not to put it in upside down good luck
What relays cover - protect the engine cooling fans on a Windstar?
Engine cooling fans are protected by relays in the engine compartment power distribution . fuse box.
1995-1998
- Relay B - high speed
- Relay H - low speed
- Relay 301 - high speed
- Relay 303 - low speed
Look under the hood near the battery for the fuse box. The relay should be a large relay near the front of the car. Usually numbered 301 or 303 (One is for low speed fan and the other is for high speed cooling fan) Check your owner's manual. My 2000 Taurus manual lists the location of all the relays and fuses in the under hood power box.
A short to ground means there is very little or no resistance between some electrical device and ground. A "dead short" would be no resistance at all. This causes very high current which blows fuses and causes overload protection devices to trip out.
The intake gasket have anything to do with the car overhearing?
ya, especially if you are leaking antifreeze internally or externally. if intake manifold gasket leaks usually have vacuum problem result in "rough engine idle" look for external antifreeze leak at manifold gasket first. then check oil for "milky color" - if antifreeze runs low due to leak = Yes - engine overheat. Dont drive it - you can do a lot more damage if you do.
Low coolant light keeps coming on.?
maybe your just low on anti freeze I would take i tto your mechanic to check it out because if there is an underlying problem it could cost you your engine
May I add:
If you're not losing fluid because of a faulty gasket or leak to the exterior, read the following:
Often an overlooked sensor (the Low Fluid Sensor in the Radiator Coolant Overflow Tank) is the culprit. If you are not continually losing coolant, it's safe to say that you don't have any form of leakage. Unlike the sensory switch located at the rear of the radiator, fixing an issue attributed to a clogged "Low Fluid Sensor" can be quick and painless.
You might not need to remove and clean this particular sensor --- simply repositioning and cleaning the sensor by GENTLY turning it back and forth a few times (while it remains in the reservoir tank) and making sure that the reservoir coolant level is correct will resolve the problem. If you find that the light stops coming on, you've isolated the issue. Now, drain the old antifreeze and replace the antifreeze with new antifreeze. Oh and while you're at it, remove and clean the interior of the coolant reservoir and remount it before you replace the antifreeze.
Done. Happy motoring.
How do you remove the air conditioner evaporator on a 98 S-10 Blazer?
Actually, it was just the Blazer in 1998... the "S10" designation was dropped in 1994, when the full sized model became the Tahoe.
As for removing the evaporator, it's located in the HVAC compartment behind the dash on the passenger side. For the sake of brevity, get the Chilton repair manual for instruction of how to remove the dash to access this.
Before removing the evaporator, you'll need to have the refrigerant recovered. This requires equipment you won't have, and must be done by a certified shop. Trying to remove the evaporator without first having the refrigerant recovered is very dangerous.
To remove the evaporator from the refrigerant lines, you'll need a set of fuel line separators. NAPA will certainly have these, or you might find them at Auto Zone, O'Reilly's, Advanced Auto Parts, et. al. You disconnect the refrigerant lines, and the rest is pretty simple. Bear in mind also that, whenever you open the AC system up and expose it to the ambient air, the desiccant in the accumulator will become fully saturated within five minutes, and the accumulator will also need to be replaced.
could be the temperature sending unit
Why does my 2002 Dodge Intrepid overheat and the heater blows only cold air?
the air conditioner is separate from your cooling system. intrepids are prone to overheating, and i think it is because the radiator is too small to properly vent heat.
AnswerCooling system should also be bled of air by the bleed screw on the water outlet located on the top of the motor.Air pockets are common.To go out about 5min. early and turn the car on and heater so that the car can be warm when you leave.
Is there a coolant sensor that controls the cooling fan on a 1.9 SEFI Ford engine?
yes but i found out if you tap into the wires on the cooling fan it keeps you running cooler and keeps your car running smooth
2000 Chevy Malibu overheating?
Uh, yes. A 10 year old car will overheat for many reasons. The thermostat can fail, there could be a leak in the cooling system, the coolant can be old. Please provide more details. If there is oil in the coolant, you may have the dreaded Lower Intake Manifold condition. Oh, and good luck!
no coolant or you have a bad thermostat and or bad water pump .
Coolant could be low. Thermostat could be broken. Water pump or fan may not be working.
I had a 2002 Vauxhall Corsa which was running hot and it turned out to be the water pump which needed replacing.
Causes for an overheat: low coolant, failed water pump, plugged radiator, failed headgasket, inoperative radiator fan, stuck thermostat, missing belt, etc
First confirm that the engine IS actually overheating - steam, no heat to the interior etc. Sometimes a temperature sensor will fail and give a misleading 'overheat' reading on gauge. For that matter sometimes the gauge can fail and give the same misleading reading. Check that the cooling fan comes on when the engine temperature starts to rise above 'normal'. If not check (in order) fan fuse, fan relay, fan sensor, fan. Real overheating is caused by a lack of coolant AND/OR lack of coolant flow. Modern cooling systems are 'closed'. In other words there should be little or no loss of coolant. If the level is significantly low you have a leak....either external or internal. With the coolant topped up to the correct level and the radiator cap on, run the engine and look for visible leaks...hoses, valves, radiator etc. Internal leaks, eg. head gasket will usually be accompanied by white exhaust smoke (steam), hard starting, rough running and bubbles in the expansion tank. Sometimes, though NOT always, you will find the engine oil has a milky look and/or engine oil will be mixed in with the coolant. == == Lack of coolant flow can be caused by anything in the system that causes an obstruction......in order of common occurance......thermostat stuck closed, radiator blockage, heater core blockage, water pump failure. One last point. because of design considerations many vehicles have the radiator mounted at a different level than the uppermost coolant passages in the engine thus trapping air in the coolant passages. In short the system must be bled of air in order to properly fill with coolant. Such systems will incorporate bleed screws usually in either the top/side of the radiator, the top hose, the thermostat housing and sometimes in all of these points. To bleed out the air do NOT run the engine as you fill the radiator. Instead, open all bleed screws. As you fill the radiator coolant will run out of one or more bleed points. Close this bleed point(s). Continue to fill until coolant escapes from the next bleed point then close that one. Proceed until coolant has escaped from ALL bleed points then continue to fill to the correct level. The expansion tank will have minimum and maximum level markings. Fill only to the minimum level mark with the engine cold. Explaining how to check each of the individual components would take up more space than I have so if the above doesn't help email me at seahog@btinternet.com.
Check the oil level add as needed. Check the water (and antifreez) add as needed Check the rediator cap. re-place if it's old or missing the seal gasket Check the thermostat. replace if old or not working See that the belt to the water pump is adjusted properly Check to see if the water pump is working. Check the radiator. Make sure it isn't clogged
It's a good idea to visually check the oil, water, belts and hoses everytime you fill up. It takes less than 2 minuites and could save you large amounts of money and headaches.
Answermake shure that the seal on the cap are not cracked Answer1 insufficient coolant in the system. 2 water pump drivebelt defective or not adjusted properly. 3 radiator core blocked or radiator grille dirty and restricted. 4 thermostat faulty. 5 fan blades broken or cracked. 6 radiator cap not maintaining proper pressure, have the cap presure tested. AnswerCheck fuses for the electronic fan. AnswerOne other thing to add o this good information. If after changing coolant or any time you have worked on the system, you must bleed all air out of the cooling system. Trapped air can cause an air pocket which will cause a hot spot and overheating. Some cars have bleeder screws and some don't. Check your owner's manual. If there is no bleeder valves and you suspect trapped air, park the car uphill or jack up the front, start the engine with the radiator cap removed and run until it reaches operating temp. This will allow trapped air to escape. Also make sure when replacing the thermostat and radiator cap you install the correct ones. AnswerLot of good answers here. I have found evaporating cooling fluid to be a problem when everything else is working correctly. Common cause for this is too much water, not enough antifreeze. Evaporation is called "boil over". Adding antifreeze to water increases its boiling point. Since water boils at 212 degrees, and (my car) optimal operating temperature is 190 degrees - there is a thin line from running normal to "boiling over". Solution - the mix in the radiator should be 50% antifreeze and 50% water. To get the correct ratio antifreeze to water, buy a coolant test kit or buy your coolant in pre-mixed bottle. a different situationwhat if the electric fans are not coming on? AnswerIn that case, (Fans not running), it may be a blown fuse, bad fan motor, or a bad thermal sensor.
Answer. If fans are not coming on, check coolant temp switch. I ahd same problem with my car. I had my cooling fan direct. Had a bad coolant temp switch
Answer:
I experienced one time an engine that was overheating due to a slipping overheating transmission. Although some diagnostics can be obvious, sometimes there is a curve ball.
If the fuel economy has dropped also?
We've seen a few older cars with cracked head gaskets - the combustion stroke, gasse are 100's of PSI. And that pressure blasts into the water jacket during operation, causing the coolant to stop circulating - normally due to extreme over-pressuring.
This should show itself as bubbling through the radiator cap - but to diagnose properly, you need a small test kit to check. (Eric the carguy and Scotty Kilmer have a video about it on ewe toob) Being that I've rebuilt only three engines in my life, it's safe to say that all the answers above are more likely - especially for a japanese car, but the septic-tank-mobiles and our aussie rubbish - this is pretty comon.
Also, check to see if the fan shroud or parts of it are missing.
Bad thermostat, water pump, heater core, or radiator blockage. Usually in that order of likelihood.
Possible causes: 1) loss of coolant 2) something clogging the coolant lines or radiator 3) stuck thermostat 4) wrong thermostat installed (wrong temp rating) 5) damaged or improper radiator cap Also, forgot to mention poor coolant circulation (water pump)
thermostat?
numerous reasons...thermostat,water pump could be going bad, no anti-freeze in radiator, no water in reserve tank...this should be checked out by a professional or you could be stuck somewhere.
It depends on the engine type:
For a normal radiator cooled engine:
Lack of coolant
Punctured radiator
Radiator fins clocked with debris
Corrosion inside radiator that leads to blocked galleries in the radiator
Lack of engine oil
Lack of airflow around the engine block (contributory)
Cracked Head(s)
Head gasket failure
Warped engine block
Old coolant
Water pump failure
Oil pump failure
Blocked cooling galleries in engine block and head(s)
Thermostat failure
Cooling fan failure
Air cooled engine:
It depends on the cooling design. Mostly it's due to lack of airflow, or in some cases oil, cracked head/gasket failure.
When you drive too long.
My 1998 Plymouth voyager Cooling Fan won't stop turning after the engine has been shut off. Why?
Probably because the cooling fan relay is dead. I had the same problem, removed the fuse and put it back on. The fan then stopped. Thought it was fine, that the relay got "sticky" or "reset". 2 days later, I stopped my car and waited for a friend with engine running. Shortly after, water was boiling: the cooling fan relay is likely to be dead and will change it today.
What are the disadvantages of biodiesel?
The disadvantages of biodiesel include a decrease in horsepower and a large amount of land devoted to growing the crops to create the fuel. Another disadvantage includes the fact that the fuel gels in cold weather.
Yellow picture of a engine warning light on pt cruiser what does it mean.?
After numerous trips to the dealer and spending over $500 and they still couldn't find the problem, I went to an auto supply store and purchased a new gas cap and haven't seen that yellow "check engine light" since! So, if I were you, I'd spend $8.00 for a new gas cap first....Mary
How do you get the AC compressor clutch off of a 1995 Pontiac Grand Prix 3.1 L?
there is a puller you can borrow it from your local autozone
all relays are pluged into your fuse box, it may be a seperate box but the older ones use the fuse box, there the little square boxes, if you have an owners manual it will have a diagram and will show you which ones are which, the cover should have numbers to go by or sometimes it will just tell you what fuse goes to what part, butch
How can you check the cooling fan sensor on a 1996 Saturn sSC2?
Cooling fan should come on when coolant temperature exceeds 235 degrees Fahrenheit or A/C or defroster are turned on
Where is the cooling fan relay on a 1998 Lincoln Continental?
They are located in the trunk underneath the
Rear dash in the trunk compartment.
There are 2 one high speed fan relay, and one low.
How do you bleed a cooling system in a 1999 Monte Carlo Z34?
There are instructions in the manual. Take off the top cover and locate the bleeder screw, directly over the Thermostat. Loosen the screw. Add coolant to the radiator with cap off till full. Start the engine. When there is water coming from the bleeder screw, then wait a bit and tighten it . Add a little more coolant to the radiator and then put the cap back on.
