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Gas Furnace Troubleshooting

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Many residents in Maryland and Washington, DC depend on gas furnaces to keep their homes heated throughout the winter season.  Gas furnaces heat homes by taking the cold air from inside the home and cleaning it through air filters.  The clean air is then heated by a gas burner and distributed by a blower throughout the home’s duct work, keeping you and your family warm and cozy.

Furnace Troubleshooting Guide

If the temperature inside your home in Maryland or Washington, DC begins to feel more like the winter temperatures outside your home, your furnace may be broken.  Before you call an HVAC repairman,  take the following steps to see if you can troubleshoot the problem or repair your gas furnace by yourself:

  • Check the Thermostat. The first step you should take if you think your furnace is not working is checking your thermostat.  Make sure your thermostat is on and set to the heating mode.
  • Make Sure the Pilot Light is Lit. A gas standing pilot is an ignition flame for the gas furnace.  The ignition flame keeps the gas burner on, which heats air on a consistent basis. If the pilot light is out, you will have to relight the gas standing pilot or hire a furnace professional to relight the flame.
  • Check to See If the Gas Valve is closed.  If the gas valve is closed, there is no fuel for the gas burner to work.
  • Examine the Circuit Breaker.  Check all the connections to the gas furnace and if there appears to be no power, then you should reset the circuit breaker.  If the fuse looks damaged, replace the fuse immediately.
  • Check the Blower.  The furnace blower distributes the heated air through the ductwork to the rest of the house.  If the blower fan is not working, the hot air will not heat the home.
  • Clean or Replace the Furnace Air Filters. If everything seems to be working correctly – the fan, circuits, pilot lights and thermostat – but it still feels cold in your home, consider cleaning or replacing your air filters.  Over time, air filters collect large amounts of dust and debris, which can block the warm air from being redistributed back into your home.

If you followed the furnace troubleshooting guide above, but you still do not have heat in your home, then consider calling a professional furnace repairman.  For a reliable, professional HVAC company to repair or replace your gas furnace in MD or DC, call Michael Bonsby Heating & Air Conditioning today!

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