Recent Feedback
My oil Furnace wont fire up. I changed oil filter, nozzle and had a tech adjust electrodes. The furnace worked for week with no problems. Now won't fire, but a light colored smoke is visable near inspection door after I pushed reset button. Please advise to possible problem.
Optional Information: Make : Williamson Model : T-164 Already Tried: Nothing past what is stated in question
Welcome to Just Answer, I will do my best to help you solve your problem
That "smoke" is probably the fuel mist coming from the nozzle. The most likely culprit would be a faulty ignition transformer since you seem to have covered the other bases
a weak transformer is still my prime suspect
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Experience: 40+ years experience licensed oil & gas tech