Why does my heater fan keep running?
You’re using the wrong thermostat fan setting. Your fan limit switch is on “manual override” There’s a shorted thermostat wire. There’s a shorted wire at the fan limit switch.
Why does my heater fan keep turning on and off?
If your blower is constantly turning on/off when the furnace isn’t heating… …you most likely have a bad fan limit switch. So if your furnace blower is turning on and off when the furnace isn’t in a heat cycle, it usually means the fan limit switch is defective.
Why is furnace fan running non stop?
If your fan limit switch is set to AUTO but the fan continues to run without ever stopping, you’ll need to call a professional. Two problems that could cause your fan to run without stopping include: A bad fan limit switch that needs to be replaced. Bad thermostat wiring.
Should a furnace fan run all the time?
Even if you have a single story home, you should still run your furnace fan. Running your furnace fan will blend the air throughout the day keeping the air in your home from having noticeable hot and cold spots.
Can a car fan still run after the engine is turned off?
Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.
Why does my car blower motor not shut off?
If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.
Why does my air conditioner fan never shut off?
Although your fan never shuts off, your heating and air conditioning still works fine. And if you have allergies, it’s better to have your fan running continuosly to filter more air anyway. And keep in mind, it really doesn’t hurt the motor or cost more money, running all the time.
What happens when you set your AC fan to auto?
When your fan is set to AUTO on your thermostat, it will only run when the cooling component of your AC is running (when your AC system has conditioned air to blow throughout your home). However, if your fan is set to ON instead of AUTO, it will continuously blow, regardless of whether the cooling component of your AC is on or not.