Heat pump blowing cold air

LouLawrence wrote:
I have the 5 button. I have 2 different units that have heat pumps and 1 unit that has a heat strip (wish I had thought it out as I would now have 2 with heats strips as the heat pumps appears to be just somewhat above useless!). We full time so cold is a normal part of our life and that means electric heaters and Webasto diesel heat is about all that works much of the Winter.
We replaced the existing old unit with an exact replacement new unit so the installer swapped the old control board with the new control board so it would still work with the old style thermostat.
Yes this is all on our 1998 Country Coach Prevost.

Sorry, you did NOT replace with an exact. They(Penguin HP) are updated units so as I stated, you CANNOT move the control board from the old to the new. That P/n I listed is the correct control board for your 5 button. The NEW HP had a 12 button control board and the hardware on the new HP will not respond correctly to the original old style control board. Heat Strips are NOT the answer. They are 5200 BTU heat strips and all they do is take the chill out of the air. They are NOT designed to HEAT an RV. Besides, since you have the Aqua Hot(webasto) there is no reason to run the roof HP's below 40 degrees. The Aqua Hot 120 element is enough to heat your RV without running the Diesel burner. You only need the Diesel burner when you require continuous HOT water. Doug