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Furnace Service - Main Control Board Giving an Error Sign in Wharton, NJ



Main Control Board Giving an Error Sign in Wharton, NJ
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Upon diagnosis found Lennox unit located in attic to be steady in a 2 flash normal blinking code status even tho there was a call for heat made at thermostat. Restart power to unit and had to go thru it’s cycles, upon going thru it’s heating sequence establish flame however units main control board and giving off an error code stating low flame signal, I verify this by attaching probes between flame sensor and sensor wire for micro-amps current reading, it read below 0.2 and then flame shut off after 3-5 seconds of it staying on. Removed flame sensor and cleaned it out, once cleaned flame signal improved to 0.8 however this is still a low flame signal, strong proper flame signal is between 1.5 micro-amps DC to 3.0.