I posted the other day about my oil boiler not starting, as I stated I mostly heat with the wood boiler, but the oil is nice on cool days when I don't want to keep burning wood. I bought this Utica boiler brand new in 2001, I don't think it's burned more than 4 tanks of oil, so I have never had it serviced. Today I replaced the oil filter cartridge, bled it and found on the interweb you have to hold the reset button for 45 seconds, the flashing green light went out and it fired right up and ran much smoother. Another day ill run my brush I got when I bought the boiler threw the chambers.