Gas Water Heater Problem

Could also be as simple as which direction is the RV lined up facing? Lots of wind? We had the same problem, turned out to be a spec of dirt in the orifice and then it depended on which way the wind was hitting the side of our RV. Yes, a real PITA. Keep an eye on your info panel and watch for the red LED that warn about a flame out at the DSI.

Cheers!

Mike

do you have a bug screen of some sort on the cover panel? Some won't allow enough air in for the heater to remain lit.

Not sure it's the same problem as yours, but mine would fail to light also. After a lot of diagnostic messing around, I thought it acted like a bad thermocouple but there is none. They sense the presence of a flame by the resistance change between the electrodes through the flame. Small change. I cleaned the contacts where the connector goes on the control module circuit board and problem was solved.

Gas flow being interrupted.....could just be spider webs. It's amazing how much they can cause problems.

Remove burner tube and spark electrode assembly.
Clean out burner tube....bottle brush, pull a rag thru it.
Clean up spark electrode....wire brush, emery cloth
Remove main orifice and clean with alcohol
While you have the burner tube and spark assembly out.......run a piece of wire thru combustion/exhaust 'U' tube, attach a rag to end of wire and pull back thru 'U' tube to clean it out.

Reassemble.......orifice, spark electrode, burner tube. Make sure burner tube is aligned so gas flow has a straight shot into combustion chamber. Align spark electrode so that it is engulfed in main flame and set spark gap to ground rod 1/8".
Also clean & tighten ground wires/screws....main frame and gas valve

elkrott wrote:
Sometimes my gas water heater doesn't light.
I can hear it clicking but it doesn't light.
Sometimes it lights other times it doesn't.
I cleaned contacts but that didn't help.
Any suggestions?

Be sure there's no junk in/around the burner. Could be a dirty orifice.

Lyle