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prg281 · 06-20-2024

Hi everybody,There is no yellow wire coming out of the exchange unit and I couldn't find 24V on any of these wires.The current (dump) thermostat has a yellow wire connected to the yellow of the outdoor AC unit.The air exchange unit black wire is conn...

prg281 · 06-29-2024

Hi @Patrick_Caezza, here is some additional info:- the fuse appears fine (0.1ohm)- there is a label on the air exchange about the transformer (see attached); could the transformer be bad even though the system is functioning correctly with a dumb the...

prg281 · 06-21-2024

Thanks @Patrick_Caezza.Here are the wiring pictures.Thermostat yellow is connected to AC (not AX); AX black is connected to the second AC wire.So AX to thermostat is only G, W, R.I'll check the fuse but both heat and cool modes are functioning; could...

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no yellow wire from air exchange (and no 24v)

Re: no yellow wire from air exchange (and no 24v)

Re: no yellow wire from air exchange (and no 24v)