Heats above set temperature
Lennox HP32 Unit. Experiencing heating problems. Unit continues to heat above temperature setting on thermostat. When shutting unit off pump will continue to run more than a few min's. So I switch off unit at breaker panel. I'll wait about an hr.when temp drops to 69 degrees and restart with thermostat set @ 70 degrees. The same problem will occur again. ?????? This unit is 10 yrs old.