Truma Ultrastore sequence to check
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Motorhome Facts -> LPG / Gas

Author: leenuts

Location: Herts

PostPosted: Mon Nov 29, 2010 10:18 pm    Post subject:  Truma Ultrastore sequence to check

2008 CI
Truma Ultrastore
10L Gas only

Does not spark when switched on.

Water tank pretty full,
water pulled through hot tap,
new-ish gas bottle,
cooker burner flames running ok,
rubber high pressure hoses, but only two years old and majority of hose below regulator input level
drain valve closed
(oh and flue over off when checked!!)

I know theres potentially a few reasons for it to stop working, but in what order would you check it bearing in mind the very cold weather and i only get an hour or so when I get in from work!!! (don't want to keep filling/emptying the tank, running the pump in this weather as bound to forget something!!) Wanna spend as little as possible with taking it to Truma specialist being the last option (although presume it may be covered under warranty?)

As I say I've seen most f the various solutions mentioned on here, but I wondered if theres an order you would do it in if times limited?



Author: hayixer

Location: Surrey

PostPosted: Tue Nov 30, 2010 6:05 am    Post subject:  

First things first, you need a spark, no spark no flame game over !!

Author: Techno100

Location: Leeds up North

PostPosted: Tue Nov 30, 2010 6:28 am    Post subject:  

How about 12 volts? no volts no sparkl Wink

Author: trevorf

Location: Cheshire

PostPosted: Tue Nov 30, 2010 11:46 am    Post subject:  

Also listen for a "Clunk" (gas valve opening to let gas though) before a fast clicking (ignitor)

As already said, check 12V supply to control PCB, gas valve and ignitor.


Author: Jezport

Location: Leeds, West Yorkshire

PostPosted: Tue Nov 30, 2010 12:08 pm    Post subject:  

I have a spare burner assembly for one if you need it.

Author: ezzy66

Location: bridport

PostPosted: Sun Dec 05, 2010 1:24 am    Post subject:  

dunno if this is too late or even it will help but when we had the same problem it was our room thermostat the cooker worked fine and all the above systems checked like you but the boiler failed to ignite and it was sending an error thus shutting down the ignition system - i had inadvertantly knocked the cable to the room thermostat in one of the cupboards ( in a silly place and very short cable prone to being pulled!) for safety the boiler will not work until this is reconnected

hope whatever it is you can sort it and quickly brr

good luck

Author: JohnGun PostPosted: Sun Dec 05, 2010 8:46 am    Post subject:  

do you have the window open ,the one above the flue? as i believe there is a sensor on the window that when opened will not allow the boiler to fire

Author: sqeek

Location: Staithes. N.Yorkshire

PostPosted: Sun Dec 05, 2010 9:03 am    Post subject:  

have 09 Pilote - Truma would work on electric but not gas

Turns out Truma had a bad batch 08/09 - whole boiler replaced FOC by Truma

apparently they know which batch numbers are faulty

Author: kandsservices

Location: Worcestershire

PostPosted: Sun Dec 05, 2010 2:34 pm    Post subject:  

Contact truma to see if your is a faulty unit as per previous post.Have you got 12v on the pcb and the gas isolation valve hasn't been turned off by mistake (had that one a few times) does the red or green warning light come on your control dial?Do you hear a clunk as the gas valve opens?

Author: leenuts

Location: Herts

PostPosted: Sun Jan 23, 2011 2:16 pm    Post subject:  


Thought I had this topic subscribed and thought that nobody had replied!! My bad. Should have remembered how helpful everyone is on here!! Thanks guys.

Now the weathers , warmed up a bit have done a few things.
The PCB has been out of the unit for a while in a nice warm house (as suggested by Truma).
I had drained the system down and made sure the MH didn't get too cold anyway with a frostguard radiator.

Off to the Alps in 4 weeks so tried again now:

Reconnected PCB
Put 40l of water in
Drain valve closed
"Pumped" water to boiler
New propane bottle, cooker gas working nice and clear
Exhaust cover off
Switch on boiler

Exhaust/gas valve opens
Ignition sparks
Shortly after exhaust/gas valve closes
Red light on boiler switch

Its a gas only water heater and not heating connected and not sure the room thermostat us relevant?
Wheres the gas isolation valve though?

Jezport, not sure I'll need it but do you still have that spare burner??

Thanks very much again

Motorhome Facts -> LPG / Gas

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