The furnace came on briefly today It is not putting out any hot nouns .Though it did for about 3 minutes a black square next to a two inside it is flashing on the digital thermostat
Answers: get the instruction book for you thermostat if you cannot find it google the brand and get it online
The thermostat is flashing an error code... If you own the instruction manual for the thermostat it will inform you what went wrong... If I'm not mistaking it's an error code for fiasco to ignite... But it can't be sure...
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