It is not a pump, but the water fault light. It indicates proper function of the propane part of the water heater, and has nothing to do with the AC electrical heating element.
It should light briefly when the switch is turned on. Ons should be able to hear the burner click and ignite, then the light should go dark.
If the lamp stays on, the burner has failed to light and/or stay lit.
Are you out of propane?
Regards,
JD
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Jeff & Cindy
'09 27FB Flying Cloud;'82 31 International
'91 350 LE MH; '21 Interstate 24GT
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