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GenoB's avatar
GenoB
Explorer
Jan 06, 2020

Suburban SW6 lights but drops out after 30+ seconds

I'm a pretty good troubleshooter but this one has me going. My 10 year old water heater has been working fine but now will only light and run for approx 30 seconds + or - a few seconds. a) Normal se...
Old-Biscuit's avatar
Old-Biscuit
Explorer III
Jan 07, 2020
GAS orifices are a metered hole/precision that allws the proper amount of gas to flow

Propane system is ONLY 0.4 psi....so proper/correct flow of gas is CRITCIAL

Orifice rusty up/rough looking and you have scraped it!!!!
REPLACE IT -----it is NO Longer a metered/precision device

And clean the burner tube also


Side Note:
Circuit board instantly drops DC to gas valve when flame is not proven/lost------INSTANTLY
Gas Valve snaps closed under spring pressure upon loss of DC to solenoids.

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