status light 4 blinks

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  1. R

    Harman PF120 issue with 4 blinks using thermostat

    I have the furnace for 2 yrs now and always been on an Honeywell T5 thermostat and worked like a charm, but for the last 3 days, my status light blinks 4 times and then the stove does not shutoff, but goes on until it runs out of pellets... did not change anything, any ideas what is going on? Tks