[tentcamper]

+2 rvcycleguy. Have the elec switch outside in the water heater off.

Just to add a little...

- you do need the propane on, checking at the stove is a good test as rvcycleguy mentioned

- Also you do need 12 v. I think you actually need something less around 10V at a minimum. So you need to be on shore power or have a good charge on the battery.

- Also, if you are trying to light it after the electric heater was on? It might not light because the temp has been met.

Do you hear the starker spark, does the switch under the sink light turn red when you flip it on??