No Options Apply Suburban hotwater unit wont run unless door is open.

[Sparksy]

Been away for past 3 weeks, some of which was offgrid. When running the hot water on gas i have a issue where the Suburban hot water unit will only run with the door slightly ajar. If closed the sound of the flame drops from normal "roar" to a softer sound and eventually the flame fails. Door vents are clear, flame tube is clear , flame rods are bright and as far as gas pressure goes, all 3 burners look fine when running at once.
Managed to use it on gas by tying the door open about 15mm with a bit of wire between catch and door.
Has anyone encountered this before?

 

[Drover]

Yes.................. someone had a thread going not that long ago, wish I could remember the cause, Im sure we discovered why.................

 

[jazzeddie1234]

Twas me! The flame is supposed to create a small current flow across the probes that is detected by the circuit board and that holds the gas solenoid open....until the board develops a fault and is not sensitive enough. The board is expensive so I just open the door each time I use gas.

PS don't try bending the probes as they will snap....don't ask me how I know this