My guess.. and I’m no expert but had this happen to me…. The Flame sensor is dirty?
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- Thread starter DEEZUZ
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My guess.. and I’m no expert but had this happen to me…. The Flame sensor is dirty?
Signs of a bad flame sensor
As with any other component in your heating and cooling system, the flame sensor can go bad. If your furnace stops working properly, look for warning signs that your flame sensor has failed:- Furnace burners turn on but go out after a few seconds
- Soot and other debris is covering the end of the sensor (cleaning the flame sensor may fix this issue rather than a flame sensor replacement)
- Tip of flame sensor is black
- Porcelain/sensor casing is cracked
Furnace flame sensors: cost, how they work, and when to repair
A flame sensor is one of the most important safety features of your furnace. It helps avoid a dangerous gas leak or explosion.
www.hvac.com
Sounds more like a pressure switch kicking the furnace out. Flame sensors are rarely an intermittent issue.
Probably a dirty P Trap inside the furnace, water backing up into the hoses and intermittently causing pressure switch to drop the burners out
Probably a dirty P Trap inside the furnace, water backing up into the hoses and intermittently causing pressure switch to drop the burners out
Unless it’s not a high efficiency furnace, but still reads more like a pressure switch dropping out the burners than a flame sensor
They should all end up in a plastic box looking thing that is the P Trap before it leaves the furnace to drain. Pull all the hoses and run water through them. Dust and crud just tend to accumulate over time. Prob slow draining p trap.
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