ok EDIT - shit sorry, im thinking gas furnace not water heater, never mind!~
is it lighting the burner at all? as in, does it light and then go out?
or just it just continually try to cycle without the gas valve ever opening? ( if there is a pilot light, it will light the gas burner when 24Vac is put to the gas valve)
it is the control modules job, to open the gas valve for usually 4 seconds, then wait for the flame sensor
flames sensed, gas valve stays open until thermostat is satisfied.
no flame sensed, gas valve closed, and cycle starts over
usually 3 cycles ( attempts to light) , with a 30-40 seconds purge ( fan on) in between until a lockout occurs.
after lockout, you will have to remove power from the control board for 45 seconds or so to reset it.
In dog beers, I've only had one.
Charter member: T.O. club.
mouthfulloflake screwed with this post 01-06-2013 at 03:11 PM