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Air condition working fine then start blowing hot air, resolved by doing a engine restart and works, until the next time. Problem is happen atleast twice a week.
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have you had the instrument cluster programmed, if not this might be your answer. i work for iveco and e
we have to programme new instrument clusters, if it was a second hand one this also might cause the problems
You will need to know if the compressor is working when it blows hot air to proceed. It could be an electrical problem, a blend door problem, or the a/c clutch on the compressor.
I have a 2002 Lincoln LS and the air conditioning works up until it gets 95 degrees outside then it stops working and just blows hot air. Any suggestions on why this happens?
It sounds like the dual climate control valve. It is supposed to close the valves when the a/c is turned on, but they get stuck sometimes. I have already replaced 2.
What happens is the valves get stuck and the engine heat will blow over the cool air making it feel warm, even though the a/c is working fine.
If it started out on one side of the car cooling better than the other than you can almost bet this is the problem.
They will be called a heater control valve by most auto parts stores. I think the part is Motorcraft YG378.
Another way to make sure this is the problem is to find the dccv and clamp the two top black hoses with pliers or something and see if the car gets cooler. It will still not get cold but this will let you know if the dccv is the problem.
Have your boyfriend check to make sure there is enough pressure using the refill kit you got. If your kit does not have a pressure guage, get one that does. Your A/C compressor will not kick in if the pressure it too low. If the pressure is good, then it could be a number of things.
Low pressure sensor (need professional to replace)
Bad A/C relay (located in fuse box in engine compartment. Can be swapped with another relay in the box to test)
Bad A/C diode (located near A/C relay, need multimeter to test, of you can just replace)
Bad A/C compressor (apply 12 volts directly to the device to see if it engages, if not, it's bad and needs professional to replace)
With A/C, there are so many variables, but this is a good start.
Is the engine temperature at the proper point? Since the AC works, I assume the fan is blowing. This means I would look at the temperature sensors and control unit next. Try varying the temperature setting way up to see if there is a point where it starts working.
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