What’s With the Furnace When It Blows Cool Air?


furnace troubleshootingYour furnace is one of those tricky contraptions that no one ever teaches homeowners about when they first move in. It’s often not until there’s an emergency that anyone takes notice. The truth is there are some basic maintenance tasks that you can do on your own to keep your furnace running in top shape. However, you should also know when to schedule professional maintenance to avoid any further damage.

A common issue some homeowners may have with their furnace is that it blows cool air, particularly during Massachusetts’ long winters. Here are a few items to look out for when your furnace is blowing cool air:

  • If your thermostat is low, it won’t heat up. Make sure your thermostat is in heat mode, then increase the temperature to your liking.
  • Your thermostat may not be working at all. Troubleshoot it by moving the thermostat up and down a few degrees to see if the air changes. You may also try cleaning the contacts in the thermostat if it’s not a digital model.
  • The circuit breaker connected to the furnace may be tripped or blown. If the circuits are tripped, try resetting them. If the fuse is blown, reset it.
  • The valve for your natural or propane gas may be closed.
  • For non-electric furnaces, the pilot light may be out. Try relighting the pilot.
  • There may be problems with the hot surface ignition or intermittent pilot.

For more information about furnace troubles, or to schedule a preventive maintenance appointment, contact the pros at Rodenhiser Plumbing, Heating & Air Conditioning. We proudly serve the Route 495/128 area of Massachusetts.

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