Originally Posted by knockando
Let me say first off that we just got back from a trip and had a great time, even if some stuff didn't work.
Model: 2010 - 3170
Issue: Started having an issue with the furnace one night where we had to shut the system off and then back to 'Furnace' and it would ignite. The second night it ran until 2 AM and then I could not get it to fire again. The fan would start up immediately but I would not hear any 'clicking' or attempt to ignite the gas. Checked the stove, started up after it seemed a little air in the line and was a good blue color. Went out and shut the gas off at the tank and turned it back on with no luck. Water heater works on gas mode too. All that being said I think the regulators are fine although I might replace mine. I read another posting that a "tripped check valve that wouldn't reset" could be my issue.
If that is the case does anyone know where the the "check value" would be on my gas line running to the furnace on a 2010 Sunseeker 3170?
Warning, stupid question: Can I change the regulator with an LP tank that is partially full? I'd imagine there is a shut off valve in front of the regulator.
Thanks! I hope to start answering questions on here instead of asking
The wall thermostat controls the operation of the furnace by reacting to room
temperature, this allows current to flow through the On/Off switch to the module board.
The module board constantly checks for a minimum 9.5 volts. If there is not 9.5 volts,
the module board will go into a stand by mode until adequate power is supplied. It will
then resume normal operation.
Upon a call from the thermostat, the module board thermostat circuit will go active. The
sail switch circuit is verified as being open. The blower output is energized. Blower
15 Seconds Purge
The module board will then verify that the sail switch circuit is closed and motor is up
to speed. If this circuit remains open for 30 seconds after the blower motor starts, the
module board will go into lock out and shut down the blower motor.
The module board checks that the gas valve relay contacts (which are located on the
module board) are open before the ignition sequence starts.
The board has a pre-purge timing circuit of (approximately 15 seconds). This allows the
chamber to purge.
7 Seconds Ignition
Cycle and Flame
The module board will energize the gas valve and enable the high voltage spark output
to the electrode for 7 seconds of ignition time.
The module board will then check for flame sense to verify successful lighting of the
main burner flame. Sparking will then be terminated and the gas valve and blower
outputs will remain energized.
If ignition is successful the module board will monitor the flame sense, sail switch and
limit switch circuits, and the thermostat inputs during the heating period.
The flame is sensed through the spark wire and electrode. Therefore, it is essential that
the electrode is properly positioned in the burner flame.
Hi I copied the above description of operation from the library. It sounds like the sail switch safety is not working and not letting the furnace gas system start. The furnace should shut down and lock out after 30 seconds with no fan proof.
Hope this helps Tim