Hi guys this is my first message, got some great information off you guys already, just wondering if some one could help me with this one, I have an explorer 1998 xlt the heater seems to always be on even with the airconditioning on (a/c and Max A/c) even when i put the thermistat swith to cool it still blows hot air. I had the gas filled on the a/c but did nothing still blowing hot air. Its is starting to get into the hot weather in Australia and the other day i had a 1.5 hour drive in 40C with hot seeping through the vents, nearly passed out. (damn)
Thanks for your help in advance
cheers
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H
Happy Traveler
Unfortunately, the best advice in this case is to take the vehicle to an A/C professional for diagnosis and repair. Servicing a modern A/C system requires specialized tools and knowledge. It's not rocket science, but the weekend mechanic is not likely to have either. In particular, "filling gas" won't solve much and can even be dangerous.
Having said that, you seem to have more than one problem. Please note that this is based on the US model, which may be different from yours. Here is a short list:
1) You may have the infamous blend door problem (Google for it -- it's a bitch to fix).
2) Quite possibly, your A/C system is defective and the 'filling' did not help. Check if the compressor is even engaging (the hub in the center of its pulley should be rotating). If it is, touch the accummulator/dryer (the big cylinder hanging right next to the firewall) or the tubes connected to it. All should be cold.
3) There is a valve that's supposed to stop the coolant from circulating through the heater core in Max A/C position. If it's actually heating in this position, and not just circulating air, that valve is not working. This is an easy fix, but by itself won't solve your problem.
A
Alan Moorman
This is probably the famous "blend door" problem -- the door has broken and is stuck in HOT mode.
Google for the fix...........
Alan
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It's not that I think stupidity should be punishable by death. I just think we should take the warning labels off of everything and let the problem take care of itself.