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i am working on a jeep renegade and need help 2.4 engine ac blowing warm 1234yf was in crash fans can be bidirectionaly controlled high and low but they do not come on with the ac and i believe that is why it isnt geting cold it has a charge the fan and condenser was replaced at body shop the compressor cluch works and sol comanding 90 percent but what controls the fans from coming on with ac the fan works but is not coming on why is it not comanding
The first thing I would check is if there are there any trouble codes set in any of the modules.
I would also monitor the pressure in the system with gauges and scan data, and check the commanded state of the compressor and fans with the scan tool.
I'd be looking at the A/C high side pressure sensor in the ECM scan data. It's the primary input the ECM is looking at for fan control during A/C operation. You can also monitor evaporator temperature to see if the evaporator is saturating.
Like Noah said, compare the A/C high side pressure sensor against the gauges, if you have them available.
so the compressor isnt workin enough to turn the fans on bc i have no codes its a compressor with one of the variable sol and a compressor clutch the pressure only gets to 150 psi
the compressor is on but im not really sure the logic on the fan the fan should be on with compressor the pressures are 150 high side the car only has 32k maybe when it got in a accident the body shop not charging the ac or it took a dump? id hate to just throw a compressor on it but im thinking of putting a used compressor on it
the compressor is on but im not really sure the logic on the fan the fan should be on with compressor the pressures are 150 high side the car only has 32k maybe when it got in a accident the body shop not charging the ac or it took a dump? id hate to just throw a compressor on it but im thinking of putting a used compressor on it
150 PSI is probably not enough for the ECM to turn the fans on. Most domestic makes will wait until the pressure exceeds 250 PSI, in my experience.
Was your reading of 150 PSI with a gauge at the high side port, or on scan data? Is the high side port on the discharge line or the liquid line?
The body shop recharged the A/C system? The charge may be low, but there's still a couple more tests you can do before shipping it back to them.
the body shop did not charge the sys when they put the condenser on then when i sucked the sys down it said it took ref out but i charged it and got good contact on the pulg to actuate the compressor clutch but i always thought the high side was low but the car was driven around before a recharge and im wondering if it burnt the compressor up
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