New thermostat & now "Check Engine" light
Got in late this afternoon & put in my thermostat with new gasket, & bled the air out of the system. At some point during the warm-up/bleeding, the CEL came on.
I've disconnected the battery and will reconnect in the morning to see if it stays on. I will update the thread with results in the morning.
I've replaced this t-stat 2x but this is the 1st CEL I've had. Ideas?