Steve Cutchen wrote:
That's a Carrier stat. BTW, I'm trying to figure out exactly what your question is, and best I can tell you're wanting step by step instructions on how to hard wire the RV in. "Have your service tech" put O under R instead of Y, at the stat. There are no warranty issues because the system is already out of warranty. Do not attempt to rewire the old stat or any other HP stat back in yourself, as a dual fuel system requires extra controls that may or may not be installed. OTOH, you might be interested in knowing that RV noise is normal, excessive RV noise is not. You may have an indoor airflow restriction or an overcharge causing excessive head pressure in HP mode. I don't know your location, but in the Mid-South a HP is currently cheaper to run than a natural gas unit. Some people find the normal RV noise to be irritating, especially if the unit is poorly located. If this is the case, then you might keep in mind that Carrier offers a unit with a Quiet-Shift (TM) defrost board, especially for customers like you.