Truma Combi boiler/heater fault

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as David says, there is a problem.

the hot water on gas should 'roar' in the same way as the heating does and the water should be hot in 20mins...

the combi 6 has three (not user managed) gas levels, 2/4/6kw, all these are used when space heating if required.

when heating water it should use 4kw (ie two burners) which you would hear easily.

i suspect there is a PCB fault as the burners obviously work when using space heating.

persist with Truma, as my PCB 'guess' is only that...it needs a diagnostic check but something isnt right.

good luck.

While we have a caravan with no computers and just switches to manually control each aspect of the heating,  boiler , fans etc .and never had any problems ...recently bought a 2019 Autosleeper  motorhome with the Truma combi boiler . It doesnt feel like a step forward .

I now seem to get a fairly regular E 514 H error with no reset for 15 mins message .. currently only running up the systems in covid lockdown but don't want to be caught out when we can go out . The code isnt in the Truma manuals but understand it relates to 12v supply and incorrect shutdown . An eventual full INIT reset does seem to clear it but dont want to be faced with this when site setting up . 

Autosleeper  and Truma havent replied yet ( furloughed ? ) 

Has anybody seen this and understand what is happening?  There is nothing in manuals about shutdown procedures .

Rod, I'm sure someone on the Autosleeper Owners Forum will be able to help. I recommend registering on there to get full benefit.

https://www.autosleeper-ownersforum.com

My initial thought is that you may not be shutting down the control panel before disconnecting power.

 

 

 Thanks .. I have done some more research and find that while its not in  any of the manuals  you must turn the heating off  and wait for a  complete shut down ( up to 15 mins ? )  before either starting the engine or turning off the Vans  console .. effectively what you  were thinking .

Bit disappointing ..  that its  not clear in the guides and  given that its now computer controlled and the 12 v  to the system  is there it cant exercise a controlled shutdown  rather than throwing an error and locking it for the next time  you want to use it .. Hey Ho .. bet that catches quite a few people  until they work out what's happening .

Will follow up the link .

We had this error code and after googling found a fantastic video that explained it was to do with carbon build up. Tap the boiler near the fan( video will show exactly where), it starts up. Have done this three times now and then boiler works like a dream so far. 
To find video just Google Yorkshiremotoroamers error code E89H update. Good luck 

As we have just had the same error code #89 on our truma heating system also and googling the issue, this thread from however long ago had helped a lot. We appreciate posts like this 

I don't know why this old thread has suddenly reappeared - but since it has, I will add my experience.  Our caravan - a Knaus Starclass 695 is fitted with the Truma Combi 6E.  The van is coming up to 4 years old now - and until the start of this year, everything with the heating has been fine.

We are away all year round so the heating and hot water gets a lot of use but at the start of the year, the hot water suddenly stopped working.  It went back to the dealer and, at great expense, the heating elements were replaced only to fail again a couple of months later.  They were replaced again, obviously at no cost to me.  

During that period, my research brought two important things to light.  Firstly, the elements have a limited life span of a few thousand hours - which equates, with our sort of usage, to about 18 months use. Secondly, if the elements are replaced without crimping the cooling fins around them, they will fail in a very short space of time.  Presumably this is what happened to ours.

It is interesting that Truma have now discontinued selling the elements alone and can only be bought with the fins already attached as part of a complete repair kit.  Obviously at even greater expense but this also means stripping the boiler down completely to fit them and it's hardly a diy job unless you have relevant experience.

I am told by my dealer - and I don't know how true this is - that Truma are discontinuing the Combi 6E and it is to be replaced with something totally new.  One can only assume that this is due to its inherent unreliability.

The elements failed a third time a couple of months ago which transpired to be nothing more serious than a loose wire coming from the 240v consumer unit and was easily fixed and not the fault of Truma.  However, when this happened at the start of a week's holiday, we were able to heat the water on gas and contrary to some of the experiences above, I found that the water was heated much more quickly - 20 mins max instead of the 40 mins or so on electricity.

When working, the Truma system is every bit as good - if not better - than our previous Alde system, but in terms of reliability, I doubt I would ever buy a van again with it fitted.

 

 

We had problems with our 2015 Swift Truma heater on our first outing the dealer fitted a new PCB but it still didn't work so took it back to the dealer who said it was OK ( I was told later they did not have the test equipment to check it )  in the end we rang Truma who suggested we took it to their place in Derby, the engineer plugged it into his gadget which showed all the fault codes on the heater he said it could be the combustion fan and a new one was fitted under warranty and all done in an afternoon