Gas Furnace Pilot Light On But Not Firing Up

This is why your furnace won t turn on.

Gas furnace pilot light on but not firing up.

If gas or propane flow to this pilot light is interrupted even for a moment the pilot light can go out and will need to be relit. What else could this be. This is a small flame which is constantly burning inside your furnace. Pilot lit but furnace not firing.

Is this a thermocouple issue. It s so small it does not consume much gas. If the pilot doesn t light on the first attempt wait a few minutes and repeat the procedure this time depressing the reset button for 45 to 60 seconds. A dead thermocouple reads as a pilot light blown out but will not always cause the pilot light to go out though it should but does not always particularly on older models.

The tip of the pilot light where the gas comes out and ignites is a haven for collecting soot grime and grit over the years. If there is a reset button on your furnace turn the valve to the pilot position and hold a flame to the dedicated pilot gas tube while pushing the button for about 30 seconds. The boiler never kicks on. 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.

This is typically the problem if you can hear your furnace click on but it does not fire up. The pilot light lights up when the thermostat is turned up. Typically about 75 125 labor to replace plus about 10 for the part. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.

M8480 ny i have a weil mclain gas fired two zone hot water baseboard heating system. Thanks for your help. Could be dead due to corrosion internal flaw or got kinked so it does not work. From time to time this tip can become clogged with debris that blocks.

However even many modern furnaces still run pilot lights.