View Single Post
Old 01-06-2013, 02:00 PM   #19
Not afraid
mouthfulloflake's Avatar
Joined: Aug 2008
Location: N.W. Arkansas
Oddometer: 18,211
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.
Smoke em if you got em, and drink your glasses to the bottom...-Will Whitmore
Charter member: T.O. club.

mouthfulloflake screwed with this post 01-06-2013 at 02:11 PM
mouthfulloflake is online now   Reply With Quote