Gas Furnace Pilot Light Won T Stay Lit

The flame sensor tells the furnace that the pilot is lit.

Gas furnace pilot light won t stay lit.

The gas valve sends gas to the main burner s which is lit by the pilot light. Furnaces of various kinds are gas powered and use a pilot light to supply heat to the unit including standard home furnaces and floor furnaces. These furnaces skip steps 3 5 and instead light the burner directly. What to do if a gas furnace pilot light won t stay lit written by doityourself staff.

If you have a direct ignition furnace you won t have a pilot light. If the pilot comes on but it won t stay lit the thermocouple may be bad and that s probably the reason the pilot went out in the first place. Attempts to re light the pilot light are futile. If your furnace s pilot light won t stay on the furnace won t work.

To ensure our content is always up to date with current information best practices and professional advice articles are routinely reviewed by industry experts with years of hands on experience. The gas valve then opens and gas flows to the pilot burner. The thermocouple detects the pilot light via sensors. This pilot light may not always stay lit due to a variety of issues that may affect the gas supply or ignitor.

A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. Maybe the pilot stays on for a moment and the furnace attempts to fire but almost immediately shuts down. Before conceding the cost of emergency repairs and calling an hvac professional read ahead for some of the most common reasons why your furnace pilot. Some common causes include issues with the thermocouple and pilot tube.

It won t stay on. When my pilot light wouldn t stay lit on my furnace i asked a few plumber buddies about the symptoms and they both said it was the thermo couple. Why does this happen. An operational pilot light in your furnace means safety from the possibility of a gas leak.

Servicing the pilot on modern gas furnaces modern furnaces tend to have an electronic igniter or a hot surface igniter and the pilot compartment is sealed so you couldn t light the pilot with a match. Your furnace will still have a flame sensor but it will be over the burner s flame. They skip steps 3 4 and 5 and light the. On mar 08 2010.

The pilot light in your gas furnace supplies heat to your home. Direct ignition furnaces do not have a pilot light.