HAS ANYONE HAS INFO REGARDING THE REFRIGERANT LEAK ON GOODMAN A/C UNIT.I CAME ACROSS SOME GOODMAN UNIT FOUND LOW ON THE CHARGE INSTALLED WITHIN LAST 5 YEARS.I HEARD THOSE HAVE ISSUED WITH THE SERVICE VALVE CAPS?HOW TO FIX THEM?
Read the Goodman Service Valve Bulletin - Here (http://www.hvactechgroup.com/files/Goodman%20Service%20Valve%20Bulletin.pdf)
The new units come with a gasket inside the service valve caps. If there's no gasket I would leak lock the threads inside the caps.
Thx for your reply.what kind of procedure u guys follow for the leak test.we usually do pressure test with nitrogen n look for the bubbles,but I found it has some flows into it.
I use nitrogen after an install but overall I find nitrogen is a useless way to find a small leak. Once the AC has been activated the best method to find a leak is using a ultrasonic leak detector.
I used to cut the lineset at the indoor coil and weld the lineset together going to the outdoor unit. Then weld a schrader port into the liquid line at the coil and pinch and weld the suction line at the indoor coil closed. I would add 300psig to the coil then 300psig at the outdoor unit. I would come back 24hrs later to see which coil is leaking and either sell them a new indoor coil or a new AC or repair a leak in the lineset.
A service valve leak can be an intermittent leak which is hard to find. Some indoor coils have a schrader valve that the installer may not have removed before welding. It could also be a hard leak to find.
Sometimes i do the same procedure but most of the time after replacing the A-coil.but would u give info what kind of sonic detector is useful once the system is activated?
Any takers for the ultra sonic leak detector?I want to buy it for the next year?any advice?