Lennox Gas Furnace Pilot Light

The pilot light is a small flame that is either lit manually and remains burning around the clock or is lit.

Lennox gas furnace pilot light.

Push in the knob and hold it in. This is typically the problem if you can hear your furnace click on but it does not fire up. Gas furnaces in a natural gas or propane furnace a pilot light ignites the source gas igniting burners inside a combustion chamber. There are two basic types of electronic igniters in modern furnaces.

A faulty or dirty ignition or sensor is a relatively easy fix so follow these steps and you may be able to solve the problem yourself. A small match can be held with pliers if a long match is unavailable. Sometimes it s referred to as the flame sensor it s a safety mechanism that shuts the gas off should the pilot go out. The generated heat then enters a heat exchanger transferring heat to the air and raising the temperature of a space to the level set by a thermostat.

A gas furnace s standing pilot in which the flame is lit at all times is sometimes referred to as a pilot light but no matter what you call it its purpose is to serve as a small ignition flame for the gas burner. If the knob won t go in fiddle with it until it does. Step by step lighting of pilot on the lennox g12 furnace. Any gas furnace uses a pilot light to trigger the burners to heat your home.

The thermocouple is the copper rod the pilot flame directly hits. Locate the gas valve and switch it to the pilot position. After waiting for 10 minutes use the following procedure to relight the pilot light. Open the gas valve on the supply line and turn the gas control knob to pilot.

Intermittent pilots still use a pilot light however it isn t a standing pilot light that remains on all the time to ignite the burner whenever the gas turns on. If the thermocouple fails to shut off the gas all the gas flowing through the furnace could get into your home. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.