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Old 06-12-2015, 10:58 AM
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Angry WJ AC/Heat Problems.

I own 2 JGCL and both have the same symptoms with the AC and heat. Both have dual temp control. There is little to no heat out of the floor vents and the AC is not cooling at peak performance. I have already had refrigerant checked and its at correct levels. I have read the posts about how to repair broken blend doors and recirculation doors. Just to make sure what I have to do I would appreciate some feedback:

2000 model displays codes 54 and 56
2001 model displays codes 56 and 42 (60th Anniversary Edition)

Any suggestions as to what parts I should buy and repair tips would be greatly appreciated.

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Old 06-12-2015, 11:21 AM
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Re: WJ AC/Heat Problems.

54 (left temp door travel too large) and 56 (right temp door travel too large) are quite common faults, which normally means that the blend door hinges are broken. You will need new blend doors for this.
42 however i didnīt see before. It means that one of 4 motor drivers had drive A shorted to ground. I would start resetting all these codes first and see if during next operation they all come back. The code 42 seems to be a shorted wire to ground.
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Old 06-12-2015, 11:36 AM
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Re: WJ AC/Heat Problems.

I need to double check that 42 code. I may have posted wrong. I plan to tear into this thing tomorrow. I'm mainly wanting to restore the AC to peak performance. It's HOT down south now. I will order the blend doors for a later installation date. Do you think closing off the recirculation door to inside air only will help the AC to cool better for now?


Correction on fault codes 46 and 52
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Old 06-12-2015, 02:01 PM
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Re: WJ AC/Heat Problems.

Putting the recirc door in cabin position will help cooling down the air, but it will re-use the same air all the time.
46 code means recirc door not responding and 52 recirc door travel range too large. This normally also means a broken recirc door. You can easily see this, by removing the blower motor (1 connector and 3 screws) and look up. You will see the recirc door above where the blower was sitting. If you can move the recirc door by hand, then the hinge is broken.
That the AC will not cool down enough, is probably due to the blend doors not closing of enough. If its really hot overthere, you could decide to cut the flow of coolant to the heater core by putting a clamp on the heater hoses. AC performance will most probably increase then, since the cold air from the evaporator will then not be mixed with (some) hot air bypassing the blend doors.
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