How Do I Fix an Ignition Problem on a Bryant Furnace?


With the right tools and a little knowledge, you can troubleshoot and correct ignition problems on a Bryant gas home furnace yourself.

Things You'll Need

  • Transformer
  • Voltage tester
  • Turn your thermostat to a high heat setting. This will show whether or not the gas is flowing, and the burner is working.

  • Verify that electricity is reaching the furnace. Go to the circuit breaker and see if the breakers are set normally. If there is no electrical problem, continue investigating.

  • Verify that your Switch Supervisory Unit (SSU) is on the "On" position. The switch is on a box connected to the furnace. If the switch is on the "Off" position, then the ignition will not spark.

  • Examine the filters on your furnace. Ignitions tend to turn off if the filters are blocked. Bryant suggests changing one-inch filters monthly, and two-inch filters six times a year. If your filter is dirty, change it immediately.

  • Check the air grill on the furnace. Like the filters, a blocked air grill also may cause the ignition to turn off. Simply open the air grills, so that the air can escape the furnace.

  • Investigate the voltage level of your furnace. Most Bryant furnaces operate between 110 volts and 125 volts. Test the voltage of your circuit breaker with a voltage tester. If your home is below or above those voltage levels, you should install a transformer near your furnace to control the flow of electricity. Unless you are qualified in that area, consult an electrician.

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