"Donita Luddington" wrote in message
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On Tue, 12 Aug 2008 06:51:26 -0400, RBM wrote:

it's telling you that there is a combustion problem.

Can you tell me what the most common cause of that "combustion problem"
might be, considering it was working fine before I turned it off for my
summer vacation?

Possibly contaminant in the oil. Dirty oil filter. Electrodes out of
adjustment or worn. Clogged or worn nozzle. It's possible that it lost it's
prime, but that would probably indicate a leak in the system, which would
need to be found. I assume you have the burner cleaned and serviced
annually. If not, you're just looking for these type of problems