I recently added some A/C Pro refrigerant to my 2000 Jeep and now every time I turn on the a/c in my Jeep the check gauges light comes on and my Jeep starts running hot. When I turn off the a/c the light goes off and the Jeep runs normally. With it being 100 degrees plus here in Arkansas this week I’d like to be able to run my A/c. I had the radiator replaced a couple of years ago so I wouldn’t think that would be the problem. I would really appreciate some info on why this is happening only when I turn on the A/C and only after I added the AC Pro refrigerant to it so any help would be appreciated.
A/C pro recharge problem
- Thread starter FirstJeep
- Start date
Does the check engine come on immediately or when she gets to the point of overheating.
It doesn’t come on immediately, after I drive it for maybe 30 minutes then it comes on. Before I added that refrigerant it didn’t do this.
What was your low side pressure? Did you overcharge it?
Is the condenser in front of the grill packed full of bugs? What condition is the cooling system in? Ac adds heat to the system. A neglected cooling stack will overheat
Check gauges tells you something on one of your gauges needs attention - in this case obviously the temperature gauge.
The condenser dumps its heat into the radiator, and an AC system with more charge will dump more heat. So, either
A. your cooling system needs work and can't handle the extra heat from the now properly functioning AC
or
B. your cooling system is fine but can't handle the extra heat from the now overcharged AC
or some combination between A and B.
The condenser dumps its heat into the radiator, and an AC system with more charge will dump more heat. So, either
A. your cooling system needs work and can't handle the extra heat from the now properly functioning AC
or
B. your cooling system is fine but can't handle the extra heat from the now overcharged AC
or some combination between A and B.
Your cooling system could be riding the edge of overheating and the condenser heat is just enough to nudge it. As mentioned check the rad and condenser for any debris and a hose flush never hurts. Is you radiator cowl in place and coolant in reasonable condition.
KennethS
TJ Expert
I was wondering the same thing. Overcharged AC may make the compressor hard to spin, so the engine may be overworked and overheats due to the added load of attempting to turn the compressor.
I appreciate the replies but if I did accidentally overcharge it what can I do to get it working correctl? Is there any way to bleed that extra charge out some way?
If it was seriously overcharged their is a relief that will make a loud sharp pop as it releases refrigerant.
Really no way to tell without a set of gauges to see if the pressures are in range with ambient temps, as shown on the press/temp chart in the Shop manual. You can download it from the Resource Section.
Last edited:
TNHEADDUCK
TJ Enthusiast
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