Newly converted R12 to 134a system
Posted: Tue Jul 11, 2017 1:14 pm
Hi All,
I just converted my 92 Miata to 134a from R12. I replaced the compressor and drier but not the expansion valve. I didnt go the valve yet because it is very hard to get too. I evacuated the system and it does not appear to leak. I used ester oil in the compressor and drier. I installed 22 oz of 134 and the system cools somewhat but does not get cold. The refrigerant seems to be circulating but the clutch does not cycle it runs all the time. When I got about 20 oz in the system the froth in the sight glass went away and there are no bubbles now but still no real cold air. Do you suspect a bad expansion valve? low side pressure is 30 and I havent read the high side. It is 94 degrees here today.
Any suggestions would be appreciated.
Thanks,
Don
I just converted my 92 Miata to 134a from R12. I replaced the compressor and drier but not the expansion valve. I didnt go the valve yet because it is very hard to get too. I evacuated the system and it does not appear to leak. I used ester oil in the compressor and drier. I installed 22 oz of 134 and the system cools somewhat but does not get cold. The refrigerant seems to be circulating but the clutch does not cycle it runs all the time. When I got about 20 oz in the system the froth in the sight glass went away and there are no bubbles now but still no real cold air. Do you suspect a bad expansion valve? low side pressure is 30 and I havent read the high side. It is 94 degrees here today.
Any suggestions would be appreciated.
Thanks,
Don