Furnace Won T Light

Is your furnace ignitor not working or not glowing and the furnace is not igniting the gas.

Furnace won t light. Simply watch the furnace the next time it tries to start up. This system uses a pilot flame but the pilot lights only when there s a call for heat from the thermostat the furnace s electronic control board activates an electric igniter that uses a high voltage spark to light the. 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. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.

If i go out site and put my hand over the exhaust the furnace will light and run. In this video i show how to test check and replace a hot surface ignitor on a. This is typically the problem if you can hear your furnace click on but it does not fire up. Is it a pressure issue.

Took it to the dealer who hooked it up to a bottle on the bench and it worked fine but back installed the same issue. An intermittent pilot system uses an electronically controlled high voltage electric spark to ignite a pilot light and subsequently the main burners when the thermostat calls for heat. A hot surface ignition system uses an electronically controlled resistance heating element not unlike a light bulb filament to ignite the gas burner. One type of electronic ignition is an intermittent pilot.

I have a suburban furnace that won t light. If your furnace is an electronic model with an automatic ignition for the pilot light but it won t light there may be an issue with the ignition. If you have a newer furnace or one with an afue rating above 80 it most likely has an electronic ignition system. Can hear the sparker and fan going but will not light.

If your furnace won t turn on go to your furnace if it is accessible to you and peak in the little plastic window on the side of it most modern furnaces will have a window. You are looking for a blinking green light.