Automatic ignition system furnace
When an electronic ignition switch fails, the heating system will not ignite, and you’re left with a cold home. These newer furnaces do not use a pilot-light system as the older furnaces did. If you have a gas , your system likely has an electronic ignition switch.
Check disconnect switches (indoor and outdoor if you have a split system). The purpose of the ignitor, on your furnace, is to automatically light the gas for the pilot light or main burners.
Before you start any major work on a heating or cooling system, take these simple preliminary steps first:1) Is your filter dirty? An electric ignition pilot has a button that you can push to light the pilot.
On an electronic-ignition furnace, turn down the thermostat or turn the power switch off and then on again to reset the ignition control module. Hot surface igniters are the most common ignition