Why does my furnace keep on shutting off?

A flame sensor problem could be why your furnace keeps shutting off. The flame sensor is a safety device designed to turn off your furnace if no flames are detected, protecting you against dangerous gas fumes. If the flame sensor becomes corroded or covered in soot, it cannot detect flames, even when your furnace is running properly.

When does the furnace blower turn on and off?

In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. Your blower should run constantly until the heating cycle ends.

How often should a gas furnace be turned on and off?

Normally, your gas furnace should cycle on and off 3-8 times hourly, maintaining a comfortable temperature in your home. But a furnace that keeps shutting off every minute or two won’t heat your house properly. Not only that, it may be signalling a bigger problem that you need to take care of.

What should I do if my furnace keeps resetting?

When your reset button first pops up, your first reaction should be to press it. When you see it, that means that a system inside or your furnace believes that this is the best solution. Start by trying to reset your furnace once. If you run into the same problem, that means that the issue comes from something that a reset button cannot handle.

What to do before turning on your furnace?

Change Filter. You should check and change your furnace’s air filter every few months.
Set Thermostat to “Heat”.
Clean Burners.
Check and Oil Blower.
Uncover Heating Vents.
Clear Chimney and Vents.
Test Safety Monitors.
Check for Smells or Noises.
Hire a Professional.

Why is my furnace not kicking on?

There are many reasons why your furnace might not be kicking on. Some of the most common explanations include: Troubles with your thermostat. Your thermostat is responsible for telling your furnace when to turn on and off. So if your thermostat is not set or working properly,…

Why does gas furnace keep shutting off?

Sometimes a furnace keeps shutting off because the flame sensor is corroded or caked in soot. When operating normally, the flame sensor detects flames, and turns off the gas valve when there isn’t any. This prevents your home from filling up with harmful gas fumes, which has dangerous consequences.

Why is your furnace not working?

Dirty air filters are often the culprit behind an inefficiently performing furnace. That’s because air filters trap dust, dirt and debris like hair, which over time can restrict or block vital air flow, overheating the heat exchanger and preventing your furnace from working as it should.