I am new to this forum, but I will do my best to answer any questions I can (I am a general contractor with a background in engineering and residential construction and machine design)
so, here is my very first question:
how many times should a regular residential gas furnace (not a high efficiency furnace) attempt to light the burners? mine is cycling through the start process (pre-light, ignitor energize, combustion, and burn for a few moments but then go out) four or five times before its achieving stable constant gas burn. the ignitor works fine (new last year), the temperature probe is clean and must be working (as it can actually achieve steady burn), and I am not getting any error lights or codes on the control board. interior of the gas chamber and everything in general is clean and in good repair. and yes, the power is on and the filter is clean.
its never been a problem, I always have heat, but it seems like it should light and maintain on the first cycle. otherwise, you are decreasing lifetime of all the ignition parts.
anybody have any ideas why its doing this or whether or not its normal?
thanks in advance