Electronic Ignition Furnace Won T Stay Lit

A flame sensor lets your furnace know that the pilot was successfully lit.

Electronic ignition furnace won t stay lit.

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. It won t start the burners i m used to the older standing flame thermal coupler systems i used to have one and replaced the thermocouples and i had no problems. 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. The thermostat calls for heat.

This turns the draft inducer fan on which brings fresh air to your furnace. To determine this turn off the thermostat. This is typically the problem if you can hear your furnace click on but it does not fire up. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.

For natural gas and propane systems an ignition system triggers the flames of the furnace to heat the air. Furnace is not staying lit. The gas valve sends gas to the main burner s which is lit by the pilot light. These furnaces skip steps 3 5 and instead light the burner directly.

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. The pilot light is lit by an electronic spark. Furnaces blow hot air through heating ducts. The gas valve then opens and gas flows to the pilot burner.

An electronic spark ignites the pilot light. 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. Furnace with a pilot light. If your older furnace utilizes a pilot light that won t stay lit the thermocouple may be loose or faulty the pilot orifice may be clogged the pilot s flame may be set too low or the safety cutoff valve.

If you have a direct ignition furnace you won t have a pilot light. The hsi heats up to around 1 800 f to 2 500 f and glows red hot. However this is how the average furnace ignites. 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.

What happens is it cycles igniter lights the pilot on for about 1 2 seconds then shuts off.