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Lennox Heater Light flashing

2K views 1 reply 2 participants last post by  hvactech126 
#1 ·
My thermostat is clicking when I turn the temp up, but the heat is not coming on. I pulled the panel off and there are two green lights. The light on the left is flasing, but when the thermostat kicks on, both lights stay on. Any ideas before I have to call a HVAC company out on a Saturday?
 
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