Miswired T-stat or Bad Heater Relay??
In March I installed a barely used, older matched Rudd split system in my Florida Mobile Home, that I have had in storage for 10 years. My nephew , in the business, wired my t-stat, and supplied the freon. Another friend, whom I had been paying for 3 years to anually add freon to my recently replaced split-system, realized that the electric heater was engaged while system was calling for cooling...He stated that it was his opinion that a heater relay was defective...We disconnected the three black leads going to heat coils and enjoyed a trouble free summer of cooling. Now the weather is beginning to cool and I will be in need of heat soon. I am looking for troubleshooting techniques to determine which relay may be defective, or is my t-stat miswired, or could it be a heat limiter bad(whatever that is).