Should the fan be on when the heater is on?
Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.
What happens to the fan when the thermostat is turned on?
The fan will not blow air unless there is a call from the system. This is the normal setting for a system fan. The On position will turn the fan on to run continuously, regardless of whether the heating or cooling system is turned on by the thermostat or not.
What happens when the thermostat is set to auto?
The Auto position will allow the system fan to operate whenever the heating or cooling system is turned on by the thermostat. The fan will not blow air unless there is a call from the system. This is the normal setting for a system fan.
What to do when your thermostat won’t turn on?
Change the thermostat setting up or down. For heating: if the heating system won’t turn ON, that is NO heat (or cooling) is being delivered when you want it, set the thermostat to its highest temperature setting and wait three to five minutes.
Why does my hot water heater keep running after the thermostat turns off?
Watch out: for warm air heat blower units behave differently than hot water or steam heat systems: to avoid damage to the heat exchanger the air handler or blower unit will normally keep running for a minute or even a few minutes after the thermostat has stopped calling for heat.
Why does my furnace turn on when the thermostat is set to heat?
It’s set to heat, fan on auto. There is a switch on the furnace which also seems to be to turn the blower fan on and off. It seems to override the thermostat because if I have the switch “on”, the fan will blow regardless of what the thermostat is set to.
When does the fan still run when the thermostat is on?
The fan still runs when there is a heat demand and the toggle switch is off (ie when the burner is active). The toggle does not kill the 115V. There is a seperate wall switch for that. There is no auto/auto setting. Only auto / on and cool/off/heat
When do you turn off the Furnace Fan?
So, when the switch is working correctly, your furnace fan should turn on several minutes after thermostat calls for heat and turn off several minutes after the heat cycle ends. But if the furnace fan runs continuously, regardless of whether the furnace is heating or not, your furnace fan limit switch is either:
Why does my furnace blower fan keep running?
Well, if your furnace blower fan won’t stop running, you could have any of the following problems: 1 You’re using the wrong thermostat fan setting 2 Your fan limit switch is on “manual override” 3 There’s a shorted thermostat wire 4 There’s a shorted wire at the fan limit switch
