Have HVAC Questions? Ask an HVAC Expert for Answers
Most likely the flame sensor needs to be cleaned. That will require gaining access to the burners, that is a relatively difficult task, is that in your skill set?
If not tell me which direction you are from the center of the nearest city and I will get you a short list of well rated service outfits in your area.
We can go from there.
Thats a good idea.