These furnaces skip steps 3 5 and instead light the burner directly.
Electronic ignition furnace won t stay lit.
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 gas valve then opens and gas flows to the pilot burner.
The hsi heats up to around 1 800 f to 2 500 f and glows red hot.
To determine this turn off the thermostat.
A flame sensor lets your furnace know that the pilot was successfully lit.
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.
Furnace is not staying lit.
The flame sensor tells the furnace that the pilot is lit.
An electronic spark ignites the pilot light.
For natural gas and propane systems an ignition system triggers the flames of the furnace to heat the air.
Furnace with a 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.
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.
Furnaces blow hot air through heating ducts.
This is typically the problem if you can hear your furnace click on but it does not fire up.
What happens is it cycles igniter lights the pilot on for about 1 2 seconds then shuts off.
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.
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.
However this is how the average furnace ignites.
The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.
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 gas valve sends gas to the main burner s which is lit by the pilot light.
If you have a direct ignition furnace you won t have a pilot light.
The furnace in my house is a york electronic ignition.
The pilot light is lit by an electronic spark.
