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Re: Trane Air Handler Fan Constantly Running
so you can close the service valves to isolate the condenser then you know if the leak is in the linset or evaporator or the condenser. there is usually a gasketed connection for the txv or a connecting tube with an orifice piston at the inlet of the evaporator. usually inside the casing. do you have specs o the test pressure? if you can increase it to maybe 200 psig or so you may be able to hear it.
Trane ac air handler
I have a Trane air handler TWH039P 150C1 from ‘92 that just handles AC and the fan continuously runs but the compressor will cycle off. If I hit the relay I can get it to turn off so I think it’s just the relay and not the timer board. Problem is I can’t find this relay and would greatly appreciate some advice on what a replacement would be. I’ve attached photos of the original relay.
Thank you!

