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Have a good mechanic to check to see if the door of the a/c and heater and defroster is working properly. I had the same problem and one mechanic said he could fix it for $750. I got it fixed by an honest mechanic for less than $100. Good Luck!!
There is a blender that controls the air flow to go through the heater core for heat, and the evaporator for AC. It very well could be stuck.
You maybe able to try and get it to get unstuck by running the cars AC and switching from heat to AC back and forth and see if it gets unstuck. Just turn it on full blast and go from heat to cool.
If that fails, then you may need to service it. There should be a Lever Marked VENT under the dash, usually by the Brake
and other pedals on the Driver's Side. Close the VENT and that will
stop the Air from coming in and leave the A/C Blowing through the
I also read this online if you have an electronic climate control. "On
climate control press off and heat button and let go quickly. Then
press automatic. The display will start rotating eventually displaying a
code 025,125 , 024 etc. Then press defrost to stop. You may hear blend
door operating atb that time. It worked for my climate control."
REMOVE HEATER BLOWER MOTOR HOT WIRE BLOWER MOTOR IT.IF IT WORKS.YOUR AC AND HEATER CONTROL SWITCH IS FAULTY.CHECK HVAC FUSES AND CHECK BLOWER MOTOR RELAY.IF BLOWER MOTOR DONT WORK WHEN HOT WIRE REPLACE IT.IF ALL CHECK OUT GOOD.HAVE DEALERSHIP DO A DIAGNOSTIC TEST ON YOUR CLIMATE CONTROL SYSTEM.
If you have duel climate control, it sounds like the blend doors inside the heater box have broke. It is a rather large repair to do. If you don't have duel climate control, look for a broken, leaking or aged vacuum line under the battery try. Hope this helps.
its not a fuse i had the same problem on my 03 x5 it an ac resistor thats at fault it controls your fan once it goes your fan wont come on or comes on intermitently once again the faulty part is a blower motor resistor should be 100 bucs at dealer or if you shop around i got mine for 75 from local parts store (carquest)
I have the same problem... If you have the auto climate control like I do there is a resistor at the bottom of the HVAC assembly right where the passengers foot would go. Be careful playing with these wires but you can wiggle them around and sometimes it worksish. But I've seen jeeps that the entire inside has burnt out because of that wiring. It is hard to find this part without going to the dealership stores say they can order it and then call later and say they cant. But you have to replace both the wiring and the heater resistor which will be a good days worth of work.
look for Main A/C relay, look for fuses, or go to a/c shop and have gas check out, perhaps leaks, perhaps evaporator, perhaps condenser, but start for relay box on front passengers side, or fuses on same side