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Re: heat /ac fan doesn't work properly
Check the relay for the blower. it may be locked . tap it lightly or jiggle the relay or check with a known good relay.this two circuits may be interconnected. check the light relays as well and fuses.
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All these problems do sound as electrical of course but ecerything that you have mentioned is all on separate circuits which is odd. More than likely the blower motor situation is the resister. The window problem could be a number of things but I can tell you that all the wiring goes through the main drivers swtich so it could be just that switch but of course you would need to test before you just go out and but one but it is a common problem. The lights could be several things as we;; but would check the ambient light sensor which is located up in the center dash near the light that flashes for you security. You car didn't happen to get wet on the inside ? In any case I hope this helps.
If the compressor is working, a mechanic would check the low and high gauge pressure. The freon has to flow thru the system to work, and the cooling fan draws air thru the condenser to get rid of the heat from inside the car. If the ac clutch is working but the gauges show equal pressure, the compressor may be faulty.
I have a 2000 pontiac grand prix with a digital climate control system.
The heat quit working, it doesn't blow out any heat. Now that it is warm
outside the air stopped blowing out any air. The digital temperature on
the climate control is not correct. When it states that it is below 30
degrees on the ext and it is warm outside the air wont be cold. Once it
starts going above 30 degrees the air gets colder. Today the blower stop
working all together. Was told it maybe the climate control unit was
bad. You can hear the door opening/shutting when you switch the temp
from cold to hot. But there was no heat blowing out whatsoever in the
winter time. Could you please give me your opinion on whether or not it
is the climate control unit or something else?
i have been having that same exact problem with my 2002 grand prix for over a year now, and when my ac is on the lower setting the it doesnt work plus the headlights and lights on my dash go out. On Max everything works. i changed the blower resistor(about $35), still doesnt work. i changed all relays and fuses related to the ac, still doesnt work. i changed out the actual ac control switch in the dash, still doesnt work. i have changed everything but the blower motor and have asked every mechanic and auto parts retailer i come across and no one knows the answer. The best answer i got is that it is probably a wiring problem like a short somewhere.