How do I Fix the Heat Ignitor on My Furnace?
Household furnaces use flame sensors and ignitors to produce heat. However, if the ignitor is faulty, the flame sensor will shut off and stop the supply of gas. The ignitor should first be checked, but if it is found to be faulty, it should be replaced. The ignitor itself will have a metal cover protecting the porcelain tube inside. Two wires will run from one end of the ignitor to a small wiring harness. Both checking and replacing the ignitor is a fairly simple process that takes little time or effort. Does this Spark an idea?
Things You'll Need
- Nut driver
- New ignitor
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Instructions
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Turn the power off to the furnace. Lift up the burner access door handle and pull it away from the furnace. You will see the ignitor next to the flame sensor and burner assembly.
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Press with your fingers on the wiring harness locking tabs to release the two ignitor wires from the wiring harness.
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Loosen and remove the two hex head screws that hold the ignitor in position. Use a nut driver. Then pull out the ignitor and look at the porcelain inside the metal cover. If it is badly discolored or cracked, it will need to be replaced.
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Place the new ignitor in position in the furnace and tighten the two hex head screws into place. Press the ignitor wires back into the wiring harness by hand. Then replace the burner access door and turn on the power supply to the furnace.
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Tips & Warnings
Take the ignitor to an electrical parts store to get a replacement. The ignitor will have a model number on its side. A replacement may also be purchased online.
References
- Photo Credit assorted small screws image by leafy from Fotolia.com
