rvman69 wrote:
Doug, let me ask this. How does the board remove the voltage from the reignitor but not the gas valve? Is there another wire that ends up feeding the gas valve 12v? Because the yellow wire that comes out of the board with the 12v goes to the gas valve then another yellow wire comes out of that same gas valve connector up to the reignitor. I am just trying to understand how it works. Thanks
The gas valve stays OPEN during that 3 attempt to start cycle. Once the 3 attempts are made and the Thermocoupler senses NO FLAME, the control board kills 12 volt power to the Reignitor and the Gas Valve at the same time. That is why, you sometimes hear a loud POP when the LP lighting sequence is happening. The LP accumulates and if you have a weak spark and does NOT light the first or second time, there is enough LP to POP when the 3rd time happens. Some model Dometics and ALL Norcolds, use the combo Spark electrode as the Spark AND the flame sensor. Doug
Now, some models, when no flame detected, stopped the valve and power to the reignitor. Then after a few seconds, started the 2nd and then the 3rd attempt. All controlled by the main control board.
