Search found 269 matches

by DetroitAC
Fri Aug 05, 2022 8:25 am
Forum: Automotive Air Conditioning Forum
Topic: '99 Pathfinder, Replaced AC System, Comp. Clutch Won't Engage
Replies: 15
Views: 4945

Re: '99 Pathfinder, Replaced AC System, Comp. Clutch Won't Engage

I think you've left disconnected a sensor or switch during these repairs, or as you've suggested it's broken or the wiring is broken. There is also a chance that your ECM or BCM (control module) has determined that the AC system has failed and has disabled it, disconnect battery wait 10 minutes, rec...
by DetroitAC
Fri Aug 05, 2022 5:01 am
Forum: Automotive Air Conditioning Forum
Topic: 1993 Jeep Cherokee A/C Performance Issues
Replies: 14
Views: 6004

Re: 1993 Jeep Cherokee A/C Performance Issues

Evaps normally burst above 275 psig, I've seen some deform at pressures lower than that. It's normal duty for them to see maybe 170-180 psig in Arizona or gulf coast countries, that's 134a saturation pressure at 120F. R12 is going to be about 155 psig at that temperature. I leak check at 150 psig, n...
by DetroitAC
Tue Aug 02, 2022 5:12 am
Forum: Automotive Air Conditioning Forum
Topic: AC compressor problem
Replies: 1
Views: 983

Re: AC compressor problem

We don't know you, can't tell if you are doing it correctly. What do you mean "tried to fill"? Can you provide more explanation?
by DetroitAC
Sun Jul 31, 2022 6:02 pm
Forum: Automotive Air Conditioning Forum
Topic: High low pressure
Replies: 24
Views: 7843

Re: High low pressure

Your information doesn't make sense. The low side pressure is NOT 125 psig if you are feeling cold pipes and it is cooling somewhat. I suspect you didn't engage the service coupler and screw down the knob or something, this pressure not physically possible with those temperature observations. You sa...
by DetroitAC
Sat Jul 30, 2022 4:31 am
Forum: Automotive Air Conditioning Forum
Topic: Tried Midas. Seeking a 2nd opinion.
Replies: 32
Views: 9732

Re: Tried Midas. Seeking a 2nd opinion.

For your reported condenser pressure of 400 psig +, yes it seems right, as in that is what your liquid line temperature should be for that much pressure. No, it's not right that you have that much pressure. The condenser has it's own separate fan, it's on it's highest speed and running like hell whe...
by DetroitAC
Thu Jul 28, 2022 9:44 am
Forum: Automotive Air Conditioning Forum
Topic: Installing Aftermarket AC in a Dodge Van
Replies: 104
Views: 47374

Re: Installing Aftermarket AC in a Dodge Van

A second service port is a great idea to confirm I believe your subcool measurement. I think more charge will just raise condenser pressures. Based on what I know, I don't think there is anything wrong with the TXV, it's controlling your low side pressure consistently, and we have no idea the real s...
by DetroitAC
Thu Jul 28, 2022 3:29 am
Forum: Automotive Air Conditioning Forum
Topic: Installing Aftermarket AC in a Dodge Van
Replies: 104
Views: 47374

Re: Installing Aftermarket AC in a Dodge Van

OK, I think the TXV is not the problem, I think it's actually overfeeding now. I think the evap exit superheat is not 32, more like 0 to maybe 4. The reason is pressure and temperature not measured at the same location and big pressure drop in between locations. My best clue is the evap inlet pipe t...
by DetroitAC
Wed Jul 27, 2022 7:09 pm
Forum: Automotive Air Conditioning Forum
Topic: Installing Aftermarket AC in a Dodge Van
Replies: 104
Views: 47374

Re: Installing Aftermarket AC in a Dodge Van

OK, but you measured those temps where I'm pointing in this picture, correct? 76F after the TXV, before the evaporator? Please confirm

I don't think adjusting the TXV was good advice based on this,
by DetroitAC
Wed Jul 27, 2022 4:26 pm
Forum: Automotive Air Conditioning Forum
Topic: Installing Aftermarket AC in a Dodge Van
Replies: 104
Views: 47374

Re: Installing Aftermarket AC in a Dodge Van

Man, this makes no sense, something is wrong. When you say you are measuring the pipes coming out of the evaporator, do you mean the inlet pipe (going from TXV to evap) and the outlet pipe (going from evap outlet, has bulb attached, goes to the compressor)? When you calculate suction superheat are y...
by DetroitAC
Wed Jul 27, 2022 12:13 pm
Forum: Automotive Air Conditioning Forum
Topic: Tried Midas. Seeking a 2nd opinion.
Replies: 32
Views: 9732

Re: Tried Midas. Seeking a 2nd opinion.

Thanks Tim David, I also think you have a bad blend door, but it's a separate issue from your AC issues. Could be broken wiring, broken actuator, broken door, stuck door. I'm assuming you have a dual zone HVAC? Driver and passenger have their own temp controls? I was assuming when you typed retarded...