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Turn thermostat on let furnace lockout. Check diagnostic LED located in blower compartment. Count flashes and check diagnostic chart for problem area. Get back with me and I can go from there. Rus
flash is continuous.
Chart is labeled as "Ignition System Diagnostic Indicator"
The first line reads: Bright - Dim - Normal Operation "Heart Beat"
This looks like what I see "heart beat"
It was the air filter...back to normal temp!
Do you feel like I should contribute $9?