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When My Furnace Starts Blowing Cool, What Should I Do?

Tuesday, February 04, 2014

Have you been doing everything you can to save on heating bills so you can stay warm without wasting energy, but now your furnace seems to have decided you don't need to stay warm at all? If your furnace starts blowing cool air, there are a number of things that might be causing it. If you're not comfortable checking your system yourself, don't be afraid to call in a professional contractor to check it for you.

Troubleshooting Tips

Here are a few things you can investigate on your own before calling in a technician to determine why your furnace is blowing cold:

  • Check the thermostat. If your thermostat is set too low or if it isn't on the right setting, you might feel air circulating that hasn't been heated. Even if your thermostat is on the correct settings, it could still be the problem. For non-digital thermostats, it can be as simple as cleaning the contacts. If a broken thermostat is the problem, it's a quick and inexpensive fix.
  • Find out if you have the right system for your home. If a previous owner chose the furnace that's currently in your home, they might not have picked the right equipment to do the job. Having a heat pump not properly sized for your home can easily cause a breakdown in your heating system.
  • Check on your system's fuel source. If your heating system runs on natural gas or propane, make sure that the supply valve is open. For electric heating systems, make sure the fuse that supplies your system hasn't blown out and the circuit breaker hasn't tripped. Fixing this problem is as simple as opening the valve, resetting the circuit breaker or replacing the blown fuse.
  • Watch your pilot light. When your pilot light is out, your furnace won't be supplying any warm air to your home at all. If you have an electric ignition on your system, it might not be starting the pilot light when it should be.

If you're having trouble with the furnace in your home, there's a West Texas contractor in your neighborhood who can help.

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