My Lennox is saying the primary/secondary limit switch is open. No heat

Lennox Primary Limit Switch Open. My Lennox is saying the primary/secondary limit switch is open. No heat I would HIGHLY advise you to call an experienced Lennox tech to deal with that problem The most common reasons for replacing the switch are.

The most common reasons for replacing the switch are. I think because the faults are so different, it's something else.

Limit Switch Open Lennox Furnace at Larry Thielen blog

Lennox G26 The G26 is a condensing 92% AFUE gas furnace I've changed out the filters and taken off the squirrel cage fan on the front and shook out some dust but it wasn't. Looks like a counterflow/down flow G24 which is a VERY nasty furnace to work on

I have a lennox model c2351fc1 primary/secondary limit switch open. However subsequent times when the thermostat calls for heating, the burners light off and then appear to shutdown due to Primary/Secondary limit. This video provides step-by-step instructions for replacing the safety limit switch on Lennox furnaces

Where is the limit control switch reset button on a Lennox elite c33. I think because the faults are so different, it's something else. The limit switch will trip typically when the temperature rise exceeds the range listed on the rating plate