Tricks for cleaning flame sensors on high eff. furnaces

[johnt2_2002]

Carrier/Bryant units take some patients.

On Lennox units that don't have cased coils on top, most of the time I will remove the top cap of the furnace, remove burner door cover, and remove the top cap of the burner box and gain access from the top side with the flame sensor still installed.

Just be careful you don't bend it back and forth as your cleaning. I can even remove the flame sensor with the rubber tee in place using a magnetic stubby 1/4". Not too difficult, just use patients.

[rusty1217]

I cringe everytime I walk in to a pma on either of these furnaces. I don't know what the engineers were thinking or why they keep installing these furnaces. They r a service nightmare.