Dr Cold Thumb
02-08-2011, 05:21 PM
Has anyone had an issue with the switch box valves ie suction valve, heating valve. I've replaced the suction valve, heating valve, and PMV (pulse modulation valve) as the indoor unit it fed was not cooling but all other unit were, after investigation I found the suction valve was stuck shut, the suction valve is a solinoid valve.
After replacing the valves and running the system I found I had high suction pressure (130psi) and a very warm suction line, I could also here the refrigerant passing through the heating valve, I used a magnet to operate the valve and was eventually alble to close it, however it is now doing the same thing and I suspect the heating valve will need to be replaced.
After replacing the valves and running the system I found I had high suction pressure (130psi) and a very warm suction line, I could also here the refrigerant passing through the heating valve, I used a magnet to operate the valve and was eventually alble to close it, however it is now doing the same thing and I suspect the heating valve will need to be replaced.