AC not cold
Thread Starter
Racer
Joined: Mar 2019
Posts: 327
Likes: 75
From: west mi. / ms. gulf coast
AC not cold
My 80 ac compressor was cycling and not getting cool inside. I checked the charge and it was at the low green limit on the gauge. Bought a recharge kit and charged the system . The compressor stays on now with the charge reading in the upper green on the gauge but it still hasn't the real cold air inside while set on max. The system is now 134a that was professionally changed over years ago. I guess my question is , should I have pumped down the system first before adding the new charge? Never did that before and had good results on a number of cars. Any advice?
Le Mans Master
Joined: Jun 2019
Posts: 7,672
Likes: 2,477
From: Indiana
Need gauges on both high and low...
make sure your hot water is shutting off to heater
totally unknown what previous person did on conversion, oil, flush, orifice, etc...cheap enough to vacuum and start over..check orifice size etc..
make sure your hot water is shutting off to heater
totally unknown what previous person did on conversion, oil, flush, orifice, etc...cheap enough to vacuum and start over..check orifice size etc..
Last edited by interpon; Jul 18, 2020 at 11:16 AM.
Le Mans Master
Joined: Jan 2001
Posts: 6,748
Likes: 1,390
If the system still had R-134a within then it's probably ok. As long as it remains pressurized then you cannot get air and non-condensible gases inleakage.
Get some gauges. Get some readings. Bypass/loop the heater core (at least for testing). Share readings.
Get some gauges. Get some readings. Bypass/loop the heater core (at least for testing). Share readings.
