Wednesday, 5 January 2022

Lennox error codes

I found 3 flashes error on a Lennox ML180uh070 today. That code is for pressure switch. Changed pressure switch and unit ran for about an hour then locked out on same code. Anyone know what might be causing this?? I cleaned hose port out.


source https://hvac-talk.com/vbb/threads/2235281-Lennox-error-codes?goto=newpost

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