Heat Pump problems

djedgar wrote:
Yes yellow wire was capped off (and did realize it was for med speed on the fan). The wires from our reversing valve are violet (instructions say also could be black). One is to the T4 terminal and one to the common white wires.

The cooling and heating work fine and no complaints there. I would have never realized the solenoid was energized at rest unless I happen to put my hand on it and it was fairly warm. No humming noise. Maybe this is normal but just does not make sense to me and not the way I would have designed it. I will probably end up shutting off the circuit breaker to that unit while in storage or non use.

I appreciate all your help Doug. You seem to know your stuff. I would be most interested if you can check the next time you do one of these. Easiest way is to plug into shore power and you can hear it click on, or off when disconnecting (assuming no extraneous noise covers it up).

DID you replace the included Ambient sensor also? THAT is also required. The 12 button board and the Ambient sensor on the new HP is NOT compatible with the 5 button board. The 5 button, what tells the system you have a HP is THAT Ambient Sensor. On the 12 button, you have a DIP switch that you flip to tell the system you have a HP. The Ambient sensor on the 12 button if connected to a 5 button board will cause problems. THAT 5 button ambient sensor included in the kit is the 1 BIG difference rather than just installing the OLD 5 button board on your new 12 buttom HP. So, you cannot just swap boards, you HAVE to swap the Ambient sensor also. Granted, you could purchase a 5 button Ambient sensor and install it with the OLD board and save some money. Doug