With proper maintenance, your furnace should give you many years of trouble-free service. Sooner or later, though, you will notice that your furnace is not coming on or it is just not heating your house as well as you think it should. You may need to call a heating pro to get your system back up and running, but there are several furnace troubleshooting steps you can take first that might save you the expense of a service call. Here are five things to look for:

  • Check your thermostat. Be sure the thermostat is set in heating mode and that the set temperature is high enough to make the furnace come on. If your thermostat is not hard-wired into your home’s electrical system, be sure the batteries don’t need to be replaced.
  • Change your filter. You should change your filter often enough to keep dust from clogging it to the point that it is noticeably restricting airflow. Unobstructed airflow is critical to effective operation of your heating system.
  • Check the gas supply. Be sure the valve supplying gas to the burner is turned on.
  • Check the pilot light. Furnaces built before the early 1990s have standing pilot lights that burn continuously. If yours is not lit, try relighting it following the instructions on the furnace panel. If it will not stay lit, it may need cleaning or it may be indication that you need to replace the thermocouple, which senses heat and automatically shuts the gas supply off if there is no flame.
  • Check the power supply. If your thermostat has a “fan only” setting, try switching it on. If the blower comes on, you have power to your system. If the blower will not come on, check that the power switch located near the furnace is on, then check the circuit breaker or fuse. Repeated breaker tripping or fuse burnouts may indicate a burned out motor or other electrical problem.

Give us a call at JD’s A/C for furnace troubleshooting in your Longview area. home. We will help you keep your home comfortable and energy efficient all year round.

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