Step 1 turn the thermostat up to a temperature at or near the outside temperature.
Why wont my attic fan shut off.
Wait to see if the air conditioning unit fan eventually shuts off.
It is important to note that there are a variety of reasons that your furnace won t turn off many of which are outside of your control.
If an inside air conditioning fan unit will not shut off there are a few remedies.
Replace the thermostat and its cover.
This article is a little different and is less common than the other problems.
Indoor fan won t shut off unless i use the circuit breaker.
It s normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops but your fan shouldn t run for hours on its own.
Why your furnace won t turn off.
Here s why attic fans are seldom the most efficient way to vent an attic.
If it does the problem is not likely the thermostat.
You tried turning the thermostat to the off position nothing works.
A switch to shut it off is a good option.
The fan limit switch is responsible for turning the blower on and off at the appropriate times.
If the fan stops running the thermostat is the problem and should be replaced.
The problem is that they will pull air not only from the attic but also from your house where they ll steal air conditioned or in your case even heated air making it most costly to heat or cool your living space.
For all of you who are struggling with that question how to turn off the attic fan there are two ways to do this.
On 2019 12 28 by jamie.
You could either go up to the attic and check if the fan has a switch.
The fan switch on the thermostat is in the auto position not the on position.
Pull the cover off the thermostat then remove the mounting screws holding the thermostat to the sub plate and pull the thermostat off.
If the fan in the attic does not have a switch you will have to turn off the circuit breaker that controls the fan in the attic.
However it may be on a dedicated circuit so you can shut it off in your circuit breaker box.
The only way to get that pesky fan to stop running is to shut it off at the breaker or the emergency shut off switch.
Still if it is installed properly it should turn off by itself once the air temperature cools to an acceptable temperature.
If yes turn it off.
As for your attic fan my advice is to disconnect it.
My furnace fan in my house won t turn off when my unit is off on 2019 12 28 by mod jamie perhaps there is a defective fan limit control or fan relay control switch.
It may be a bad thermocouple but in any case the fan does not know when to shut off.
Your hvac fan should turn on and off with the rest of your heating and cooling system.
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.
Sometimes my blower fan won t shut off for a while.
If the fan continues to run make sure the wires are secure and not touching.
So your indoor fan never stops running.
