The main in my breaker box went bad and the power was cut off. When it was cut back on with a new breaker, the hermostat did not come back on. So, I need to know how to reset it.

Hi. This is Aaron Moratalla from White Rodgers. 1879 does not return to any result. Pur thermostats usually starts with 1F like 1F79-xxx. Please call our tech line at 800-284-2925 for better assistance.