The harvester thermostat will only control the
heat from setting #1 low fire to what ever the
heat setting you have it on.
It will not turn on and off.
Quote from manual,
"A thermostat option is available for the Harvester. Once installed, the thermostat option will adjust the
Harvester burn between Heat #1 (thermostat calls for no heat) and somewhere between Heat#1 and Heat #5
setting (thermostat calls for heat), depending on what homeowner has on set control board."
Hope this helps!!!
olf20