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My heat started coming on at 6pm every day. It continues to stay on even after pulling the t-stat off the wall. The online tech said it was the switching relay (taco sr501), but I have my suspicions. What else could cause the relay to come on the past 3 days at 6pm?
Had a HVAC tech come by and for 175 bucks, he told me everything was working fine.
Heat came back on again at about 6pm, remained on again after unplugging/pulling t stat
I temporarily disconnected the red lead from tstat to the pump switch relay but want to know where I can start trouble shooting.