A/C button produces heat and heat button produces cold air
This summer we had no problem with the A/C, since the cold weather if I put the heat to the max on any position it produces cold air but if I put it on A/C the air is kinda warm. Is there something I can do to fix that problem?
Re: A/C button produces heat and heat button produces...
Sounds like the blend door in the HVAC unit is malfunctioning. there is a servo motor that switches a door from the cold side to the heater core side for hot air. sounds like thats what it is. hope this is helpfull
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Put a piece of cardboard in front of the radiator. Only if it's cold out though, Usually in really cold weather, the cooling affect of the cold air circulating around the radiator keeps the fluid from getting hot enough to produce heat unless your running in park.
Bad news ,nothiong worse than a cold car so iam assuming this is a 16v job and the thermostat is behind the timing belt which is a summers day type job ,so as a temporary fix put a sheet of cardboard in front of the rad till the weather warms up this will make the engine run hotter and the cars internel heater radiator will be all the cooling it needs in the cold weather
I am guessing you have not changed your thermostat from a summer one to a winter one. If this is the case you need to put a 195 degree thermostat in to replace the 165 degree summer one. Let me know. Thanks.
Just had this happen today to my 2007 silverado heat on the right side cold air on the left side. After engine was off 15 minutes and restarted heat was on both sides. I'm guessing a relay failed to open door to allow the heat to flow thus blowing cold air.will monitor diligently for a while.
The compressor on the air conditioner in my 2000 GMC Yukon XL went out last summer. Had it and the whole line replaced at a local air conditioning shop last fall. Used it little before cold weather. Warm weather this spring and no cold air. We could hear the compressor trying to kick in. The shop told us that the control console was bad and had to be replaced. They told us the part was on back order and did not know if they would be abel to get one any time soon. We took the Yukon into the local GM dealership. They told us that the high side fitting was bad and that the freon was very low and that they would have to deal with that first to check the system. Called back to the air conditioning shop and they said they had a console come in and they would put it in and check the high side fitting. I now have cold air and questions. Bought Yukon in 2005 used, had always had problem of not switching to cold air once the heater has been used. We were told changing the console should fix that. It has not changed. I feel like the console angle was a scam, that the system was just low on freon. Each shop was blaming the other for trying to scam me. And what can fix the heat to cold issue? If anyone has answers I would sure appreciate the knowledge.
You might want to flush and re-fill slave cylinder and bleed the system.Use only the recomended fluid,sounds like either air in system or too light weight fluid in cylinder.when hyd. fluid gets hot it get thin when its cold it stays thicker.Is there a heat sheild missing? Hope this helps.
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if you have put stop leak in the car it can clog your heater core.
check your thermostat
check your engine oil if it looks milky you have a head gasket problem aslo check your coolant if there is oil in your coolant you have a head gasket problem
we had this problem in our shop the other day and there was water in the air lines so we put air line deicer in the lines when the truck was warm in the shop and cycled the suppension twice with a jack. you can find deicer in many truck stops and auto pat stores that sell truck parts