A friend asked me to take a look at their oil burning furnace. I have worked on exactly 2 of these in the past ten years, as our furnaces around here are all LP, Natural, of electric.
I was wondering if someone could share the basic checks a person should do as a pre-season checkup.
I would guess the burner orifice may need cleaned, as well as a check/cleaning of the flame proving device. How about the carbon monoxide reading? What should I normally read in the flue?
It hasn't been looked at in over 10 years, so I will be checking for any heat exchanger issues.
Any help would be appreciated.