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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Our system is on lock. I can't get it unlocked. Please help

Customer Question

Our system is on lock. I can't get it unlocked. Please help
Submitted: 5 months ago.
Category: HVAC
Customer: replied 5 months ago.
Lennox PX4146 SN 4407K06622
Customer: replied 5 months ago.
Is anyone there?
Expert:  Phil replied 5 months ago.

Yes

Expert:  Phil replied 5 months ago.

So far it sounds like that unit has tripped its high temperature safety cut out switch, which in many cases has to be manually reset. Look for that at the outside unit

Expert:  Phil replied 5 months ago.

If that is not the problem, most likely there is a defect in the the printed circuit board for that system.

Tell me a lot about your technical electronics skill sets in that case, we can go from there