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How to Diagnose and Replace a Bad Flame Sensor

Posted by James Clark on Jan 9th 2023

How to Diagnose and Replace a Bad Flame Sensor
If you have noticed your furnace kicks on an off or fails to start up at all, one of your first diagnostic steps is to check the furnace flame sensor. This is one of the simplest furnace repairs; Oftentimes, a simple cleaning of the flame sensor will get you up and running again, however, there’s much more to flame sensors than that, and while a cleaning will get you through …
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Before calling a service company out, here are some basic furnace troubleshooting tips that you can easily run through yourself and save $$$.1. Check Thermostat BatteriesRemove and replace batteries. The thermostat signals the furnace to come on based on the internal temperature sensor. Failing or dead batteries can cause loss of communication with the furnace and cause it not …
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