Nest learning thermostat will not turn heat off. Its on farenheight,
with new signal cable, new burner control unit. Was set to 62 (outside
temp. 25 - 30 f). Had house up to 85 - 90 f.
After installing nest learning thermostat (used for heat) it worked well
for 9 weeks. Then it just kept the heat on. Thermostat was set at 62 and
house temperature was 90. The outside was 20 degrees to 30 degrees. Is
this common?
After removing the thermostat, the heat turns off and stops circulating
hot water. The burner continues to fire to maintain water temperature in
boiler. I have already swapped out burner control unit with a new one
and the system still runs constantl...
