leecatd8209
The Fourfather
- Joined
- Jul 1, 2015
- Location
- Reading, PA
I recently picked up a clean, low mileage 240 and I'm in the process of shining it up, and making everything work. The latest project has been the AC, but it's been a struggle. I had some minor success with it earlier in the week. At one point, charged with r134-a, it worked somewhat poorly for a short time. After some reading I'm wanting to use air duster, but right now everything is screwed up. I've changed the compressor oil, receiver/drier, and added R-134a fittings. The weather here is mid 90s with 95%+ humidity every day.
Currently:
I had everything evacuated, it seems to hold pressure well, pulled a vacuum for about an hour, then let it sit. After I kill the vacuum pump it slowly creeps up to ~18psi vacuum, but then holds there indefinitely.
When I charge the system the compressor kicks on, and then never shuts off. I added the appropriate amount of refrigerant and my low side has almost no pressure, the high side is at 130lbs all the time. At rest they both equalize at ~90lbs. I've tried undercharging, overcharging, air duster, R-134a, no difference. Hot ass air out the dash.
When it's charged the the proper pressure the thermal expansion valve before the evaporator is very cold, and covered in condensation, but the evaporator is warm. I'm sure this is some of my problem, but my pressures aren't really indicating that. (unless they are, I'm pretty new at this).
Anybody have any ideas? Maybe there's an AC guru in here? If I left anything important out let me know, and I'll get you some info.
Thanks!
Currently:
I had everything evacuated, it seems to hold pressure well, pulled a vacuum for about an hour, then let it sit. After I kill the vacuum pump it slowly creeps up to ~18psi vacuum, but then holds there indefinitely.
When I charge the system the compressor kicks on, and then never shuts off. I added the appropriate amount of refrigerant and my low side has almost no pressure, the high side is at 130lbs all the time. At rest they both equalize at ~90lbs. I've tried undercharging, overcharging, air duster, R-134a, no difference. Hot ass air out the dash.
When it's charged the the proper pressure the thermal expansion valve before the evaporator is very cold, and covered in condensation, but the evaporator is warm. I'm sure this is some of my problem, but my pressures aren't really indicating that. (unless they are, I'm pretty new at this).
Anybody have any ideas? Maybe there's an AC guru in here? If I left anything important out let me know, and I'll get you some info.
Thanks!