Why does the fan on my oil furnace keep running?
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.
Why is my fan running when my thermostat is off?
If the fan is the only thing running when the AC unit isn’t, there may be a faulty relay switch prohibiting the settings on the thermostat from being communicated to the fan. Another cause could be a wiring issue or a short circuit preventing the system from recognizing the on and off signals.
Why does my blower fan keep running?
Faulty Thermostat: If both the fan and either the cooling or heating system are running unexpectedly, you may have a faulty thermostat. Broken Relay Switch or Short Circuit: If only the fan is running, there may be a broken relay switch preventing the settings you enter on the thermostat from being sent to the fan.
How do you stop a furnace fan from running?
Set your thermostat to a temperature that’s lower than the current room temperature. This shuts the furnace down and prevents your thermostat from calling for more heat. If the furnace was in the middle of a heating cycle, wait 3 to 4 minutes for the blower fan to stop running.
Why won’t my furnace shut off?
If your furnace won’t shut off, you likely have one of the following issues: Thermostat issue. Dirty air filter. Faulty blower.
How do you reset a furnace fan?
How to Find and Reset your Furnace Motor Blower
- Step 1: Turn off the power to the furnace. …
- Step 2: Remove the blower compartment cover. …
- Step 3: Make sure the blower is completely cooled off. …
- Step 4: Locate the reset button. …
- Step 5: Press the button in (assuming that this is your issue and that the button has popped).
Why doesn’t my furnace shut off?
If your furnace won’t shut off, you likely have one of the following problems: Incorrect setting on thermostat. Dirty air filter. Broken blower fan motor.
How do you fix a fan that won’t turn off?
Steps To Fix a Ceiling Fan That Won’t Turn Off
- Step 1: Rule Out the Remote Control First. …
- Step 2: Try the Switch in the Room. …
- Step 3: Take a Look at the Chain. …
- Step 4: Disconnect the Power to the Room. …
- Step 5: Analyze the Internal Components of the Fan.
Where is furnace fan limit switch?
Quote from the video:
Right behind the electrical gas valve. And it's located in the heat exchanger area.
How do you know if a fan relay is stuck?
Quote from the video:
If you want to you can do a resistance check of the coil. But that's really not going to be necessary we've got 24 volts to it and it's not pulling the contacts.
Why is my furnace constantly running?
A dirty furnace filter is the number one reason we’ve found that furnaces run constantly. The air filter captures dust, pet hair, and debris that could damage the furnace and keeps it from getting to the heat exchanger. If the filter is dirty, it restricts airflow across the heat exchanger, which causes it to overheat!
Why does my heating unit keep running?
When your furnace keeps running after the temperature has been reached: Check the blower motor – Your forced air heating system includes a furnace, whose burner heats air for your home, and a blower motor, which pushes that air through your ducts and into your living space via vents.
What do you do when your heat won’t stop running?
Sometimes having the heat turn off is as easy as changing a wrong thermostat setting.
- Ensure Your Thermostat is Set to “Auto” …
- Check Your Temperature Setting. …
- Put in Fresh Batteries. …
- Fan Limit Switch Needs Replacing. …
- Faulty Thermostat. …
- Air Ducts Are Leaking.
Why does my heater keep running when the desired temperature is met?
When your furnace keeps running after the temperature has been reached: Check the blower motor – Your forced air heating system uses a blower to push air through ducts and into your living space; sometimes, the blower runs at the same time that your furnace is heating the air, but sometimes it runs on its own.
