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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a lennox elite series furnace and the blinking light

Customer Question

I have a lennox elite series furnace and the blinking light indicators are saying: primary/secondary limit switch open. It will come on and run for about 1 or 2 minutes then shut off. I went to school for hvac but its been 20 plus years. just not sure where to start. Please assist. Thanks so much. Scott
Submitted: 1 year ago.
Category: HVAC
Expert:  Kcrand36 replied 1 year ago.

Good Morning, I am Kevin, one of the techs here on JA.

I understand you are having problems with the furnace?