Tag Info

Hot answers tagged

2

Looks like you have a gas furnace. If so the furnace will fire and preheat the chamber before the fan engages. This help dissipate any cold air in the ductwork before it blows into the conditioned space. On page 22, Note #12 of your schematics there is a 25 second delay for heating. For cooling there is only two seconds delay. For heating, this would be CPU ...


2

You've asked several questions here. Checking if it's 24V AC First of all, by far the vast majority of furnaces use 24VAC for control wiring. However, it's always better to be sure rather than make assumptions, so there are several ways to do this: Look at the spec sheet or manual for your model Look for labels on the control board, probably where the ...


1

FAN ON When the FAN switch on the thermostat is switched to the ON position, the thermostat energizes the G terminal. This tells the furnace to turn the blower motor on. If the furnace is equipped with a multi-speed motor, the motor will typically be in HIGH speed when the G terminal is energized. FAN AUTO When the FAN switch on the thermostat is set to ...


1

Probably. You'd have to inquire of the furnace maker if it is or is not. Speculating, since we have no information about what make or model furnace you have, it probably runs the burner until the heat exchanger is too hot, shuts off the burner until it's too cold, and starts it again. Very few furnaces have any ability to modulate the flame, so it's either ...



Only top voted, non community-wiki answers of a minimum length are eligible