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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I dont know what model thermostat I have and I dont have a

Customer Question

i dont know what model thermostat I have and I dont have a user manual it is flashing
L9 what do I do
Submitted: 1 year ago.
Category: HVAC
Expert:  Eddie replied 1 year ago.

I don't know if this is your unit or if it might be of some help but see if it matches...........'sManual.pdf

what I was reading from other manuals is that L-9 is a startup issue from an outside unit (compressor) ..................this might afford a little help to you until another of my colleagues can come along with more