On Wed, 21 Jan 2009 10:28:14 -0800 (PST), "
wrote:

On Jan 21, 11:10?am, Mikepier wrote:
These are all valid suggestions for troubleshooting, but I'm still
puzzled why the blower comes on if there is no flame?

burner likely turns on, then off quickly
Either that or the controller starts the fan after a fixed delay any
time the burner is "turned on " (whether actually burning or not) as a
fail-safe to protect against a high-limit failure.