Lennox 13H13 Thermostat
Lennox 13H13 7D 1H/1C Conv/Heat Pump Thermostat Replaces: X4146
QUESTIONS & ANSWERS
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screen is totally blank what is the matter?
It could be the power supply or the screen display itself is bad.
Lennox 13H13 7D 1H/1C Conv/Heat Pump Thermostat Replaces: X4146
screen is totally blank what is the matter?
It could be the power supply or the screen display itself is bad.