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My Truma Rapid Ultrastore will not work on gas. When I rotate the switch to turn the heater this is what happens:-

There is a click sound and the green light illuminates. Immediately there is a second click and the red light illuminates as well as the green.

I have purged the gas line. I have cleaned the terminals in the bottom purple box component on the pcb. I have warmed the pcb to eliminate the possibility of damp.

Even when the pcb is removed from the base connections the same click/ light sequence occurs.

Any ideas gratefully received

Thanks

Allan

give gary a ring

http://www.arcsystems.biz

Quote: Originally posted by discoverytdi on 20/2/2010

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There is a drain pipe located at the bottom right hand side of the flu, it can get clogged up. It is a condensation drain for the burner, I've found it clogged on quite a few vans I service

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Gary,

There doesn't seem to be a clunk from the gas valve. There is no sound of sparking. If the rotary knob is turned very slowly there are the two separate clicks and lights as described above but if is turned at "normal" speed then the clicks sound as one and both lights appear instantaneously. Where would the best place be to source a replacement control board ?

Thanks

Allan

I know where there is an identical caravan that's very near me. I wonder if I can convince them to let me borrow their pcb. We'll see.

Thanks for help so far.

Allan

Well after trying various electrical checks. (Thanks Peter) I removed the circuit board and put it on a radiator for 2-3 days to thoroughly dry it out. I 've reassembled the heater and guess what?  It's working again. So if it keeps on working this has been a simple fix to a potentially expensive problem. It must be worth a go if you have have problems with your water heater. But why does it have to be so relaint on the electronics? It's only a kettle after all!

Allan