Electronic Ignition Furnace Won T Light

This system uses a pilot flame but the flame lights only when there s a call for heat from the thermostat.

Electronic ignition furnace won t light.

Never attempt to light a furnace by a flame manually especially if the furnace has an electronic igniter. Because an electric ignition does not need constant power the way a pilot light does it contributes to energy savings. The furnace s control board might not be supplying the voltage to the ignitor. When the thermostat calls for heat 24 volts are sent to the electronic ignition control module which energizes the furnace blower and other systems and sends 120 volts to the hsi.

When your furnace fails to ignite the first place to look is the pilot light. If your furnace lights and the gas stays on for 8 to 10 seconds then shuts right back off then you can try to clean your flame sensor with light sand paper emery cloth or steel wool. The hsi heats up to around 1 800 f to 2 500 f and glows red hot. Since there are many different types of gas furnaces it is difficult to cover every single possible gas furnace problem that can occur with a gas furnace in one article.

A furnace equipped with an electronic igniter cannot be lit manually. The standing pilot light was the regular way to ignite gas powered furnaces for almost as long as these heating systems have existed. 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. To determine this turn off the thermostat.

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. But now an electric ignition system have started to replace pilot lights. Electronic ignition gas furnace problems troubleshooting gas furnaces are a prevalent form of heat for homes and businesses and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace. One type of electronic ignition is an intermittent pilot.

If you have a newer furnace or one with an afue rating above 80 it most likely has an electronic ignition system. Please click here to see our furnace control boards page. This is typically the problem if you can hear your furnace click on but it does not fire up.