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1

I finally figured this out, and wanted to let others know in case they encounter such issues. The air handler (Rheem RHLLHM6024JA) has an adjustable blower motor, controlled by wire taps. According to the specs (conveniently written on the outside of the air handler unit), the motor should be tap'd at T4 for low speed, and T5 for high speed. It was tapped at ...


2

Nice chart. This looks like abnormally frequent triggering of the defrost cycle. Typically this will occur if the unit is severely low on charge or when the outdoor thermostatic expansion valve (TEV) has failed and is restricting flow of refrigerant through the outdoor coil so severely that the coil freezes in an abnormally short period of time, triggering ...



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