davanne Posted October 31, 2010 Share Posted October 31, 2010 We have a friend here in spain and his truma gas blown air won't fire. It was working fine a few weeks ago. Has anyone any ideas? B-) Link to comment Share on other sites More sharing options...
enodreven Posted October 31, 2010 Share Posted October 31, 2010 Hi, Very difficult to give any advice without seeing the appliance, but it may help someone if you can give a little more detail of what actually happens. Normally the Truma heaters make a series of noises as they go through there start up process, if you listen carefully and then let us know it may help. (Not a Joke honestly) Link to comment Share on other sites More sharing options...
Brian Kirby Posted October 31, 2010 Share Posted October 31, 2010 Which model is the Truma? There are several, some with electric heating, some without.Does this fault affect water heating, space heating, or both? What do the controls show, in terms of green/amber/lights, in what sequence, and when. I assume they have gas for other uses? I assume the gas supply to the heater is turned on? Link to comment Share on other sites More sharing options...
Derek Uzzell Posted October 31, 2010 Share Posted October 31, 2010 Unless the problem is straightforward and is specified in the Truma trouble-shooting list for the particular model of heater involved, then resolution will need specialist attention. My previous Truma C-3402 heater suddenly refused to fire-up on gas (working fine one day - not working the next). As Braunston advises, after a time users learn that the heater makes certain noises during the ignition phase and it was apparent that my heater was no longer making its usual noises. The heater was stripped down and it was discovered that the ceramic insulators on the igniters that lit the gas at the burner had both cracked preventing sparks being produced. I believe this was a not uncommon fault with older C-Series heaters. Link to comment Share on other sites More sharing options...
topfitter1 Posted October 31, 2010 Share Posted October 31, 2010 hiwhen mine stoped working i found out it wanted a new battery.it may be something as simple as that Link to comment Share on other sites More sharing options...
first5 Posted October 31, 2010 Share Posted October 31, 2010 You don't say which model it is but on the PCB on top of the system you should see a flashing red light when the system fails. It flashes like morse code, dots and dashes. Once you find the repeated sequence check on internet for diagnosis or contact Truma, they will tell you what the problem is straight away. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted November 1, 2010 Share Posted November 1, 2010 first5 - 2010-10-31 9:11 PM You don't say which model it is but on the PCB on top of the system you should see a flashing red light when the system fails. It flashes like morse code, dots and dashes. Once you find the repeated sequence check on internet for diagnosis or contact Truma, they will tell you what the problem is straight away. I don't really understand what you mean by "the PCB on top of the system", but I'm guessing that you are referring to the LEDs fitted to the control-switch of current Truma "Combi" heaters. As far as Truma appliances are concerned, to the best of my knowledge this type 'Morse Code' diagnostic arrangement is unique to the Combi. Older combination air/water heaters (like my C-6002EH heater) have a control-switch similar-looking to that of a Combi, with similar red, yellow or green LEDs on it, but red LED diagnostic read-out is limited to the LED flashing (battery voltage below 10.5V) or illuminating steadily ("There's a disabling fault!") Link to comment Share on other sites More sharing options...
Guest peter Posted November 1, 2010 Share Posted November 1, 2010 Does the water heater work? do all he burners on the cooker work all at once? If not, I would suspect the regulator, it's well know that the Gok/Truma ones are rubbish and prone to failing very early. Of course I'm assuming that there is enough gas in the cylinder. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted November 2, 2010 Share Posted November 2, 2010 If (as seems fairly likely) the Truma appliance that won't light on gas is a 'combination' air/water heater, then there's no point checking whether or not a separate water-heater works, as there won't be one. Plainly, if there's no gas reaching the heater, then the thing won't light on gas. There might be a simply reason for the lack of gas - the gas-bottle/tank being empty, the bottle/tank being turned off or a gas-valve within the motorhome being turned off. Or, as peter advises, the regulator may have failed. In all those cases, it's to be hoped that the motorhome owner, or his motorcaravanning pals, will have taken the commonsense initiative of confirming that the vehicle's other gas appliances are working normally before blaming the heater for its non-functioning. As I suggested earlier - after confirming that there's no obvious problem with gas and 12V power supplies to the heater - the next logical step should be to study the trouble-shooting guide in Truma's Operating Instructions for the appliance. These can be accessed on-line via http://dealer.truma.com/_anweisungen/Truma-Katalog/index_gb.html?&language=en_gb&dataLanguage=en_gb If the trouble-shooting guide doesn't provide a cure, then the heater will need attention. It might be possible to carry out an 'external' fix with the heater remaining in situ (eg. by replacing a fuse (cheap) or the heater's printed-circuit board(not cheap)) or, as happened with my C-3402 heater, the appliance will need to be removed from the motorhome and taken apart. Link to comment Share on other sites More sharing options...
terryW Posted November 2, 2010 Share Posted November 2, 2010 The best think your friend can do is phone Truma direct, even from abroad they are very helpful and will tell him how the access the fault codes and what the fault indicated is. One word of caution, I experienced a situation on a Combi 4 where the code varied between tests and some dealers don't have all the codes in their book. In my case the PCB was diagnosed as faulty and replaced it worked for two tests and promptly failed again. At that point Truma gave me a replacement boiler my engineer a replacement board and three hours labour. I gladly paid him the other three hours he spent on the blessed thing! In short get them to talk to the guys at Truma I give them 12/10 for the support I got.>>>>> ******Service and Technical Tel: 01283 586020***** Wish them luck Terry Link to comment Share on other sites More sharing options...
Guest peter Posted November 2, 2010 Share Posted November 2, 2010 Derek Uzzell - 2010-11-02 8:59 AM If (as seems fairly likely) the Truma appliance that won't light on gas is a 'combination' air/water heater, then there's no point checking whether or not a separate water-heater works, as there won't be one. Plainly, if there's no gas reaching the heater, then the thing won't light on gas. There might be a simply reason for the lack of gas - the gas-bottle/tank being empty, the bottle/tank being turned off or a gas-valve within the motorhome being turned off. Or, as peter advises, the regulator may have failed. In all those cases, it's to be hoped that the motorhome owner, or his motorcaravanning pals, will have taken the commonsense initiative of confirming that the vehicle's other gas appliances are working normally before blaming the heater for its non-functioning. My apologies Derek, for stating what might seem obvious to many, but not everybody. In future I'l keep my view to myself. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted November 3, 2010 Share Posted November 3, 2010 peter - 2010-11-02 10:28 PM Derek Uzzell - 2010-11-02 8:59 AM If (as seems fairly likely) the Truma appliance that won't light on gas is a 'combination' air/water heater, then there's no point checking whether or not a separate water-heater works, as there won't be one. Plainly, if there's no gas reaching the heater, then the thing won't light on gas. There might be a simply reason for the lack of gas - the gas-bottle/tank being empty, the bottle/tank being turned off or a gas-valve within the motorhome being turned off. Or, as peter advises, the regulator may have failed. In all those cases, it's to be hoped that the motorhome owner, or his motorcaravanning pals, will have taken the commonsense initiative of confirming that the vehicle's other gas appliances are working normally before blaming the heater for its non-functioning. My apologies Derek, for stating what might seem obvious to many, but not everybody. In future I'l keep my view to myself. You can be so touchy! The basic difficulty trying to answer this inquiry has always been that no useful details have been provided (originally or subsequently) about the problematic Truma heater itself. Brian Kirby, towards the start of the thread, said "I assume they have gas for other uses? I assume the gas supply to the heater is turned on?" So that's the 'Is there a functioning gas supply?' issue adequately covered. If the faulty heater were an "S"- or "E"-Series appliance, then there could well be the separate gas-fuelled water heater that you mentioned, but the OP's reference to a "truma gas blown air" suggests that the appliance is a combination air/water heater. The reasoning behind that assumption is that, if the appliance were an S-Series convector-heater with the blown-air option then the OP would probably have used different wording (eg. "Truma fire"). The heater could be an E-Series model, but relatively few motorhomes have these so it's statistically unlikely. If the heater is indeed a 'combination' appliance, then (again statistically) it's more likely to be a C-Series model than the current "Combi". And, if it's a C-Series heater, then the the Combi's flashing-LED diagnostic codes that have now been brought up twice won't be relevant. If the owner of the heater has a Truma Operating Instructions leaflet for it, then the obvious starting-point is to read the trouble-shooting section to see if that helps. If he/she has no Operating Instructions leaflet, then they are viewable/downloadable from Truma's website. If the advice in the Instructions' trouble-shooting section does not solve the problem, then specialist assistance will need to be sought. Such assistance might be obtained by contacting Truma(UK) as terryW suggests (and the Truma(UK) technicians would certainly require more details of which Truma appliance is involved than a "gas blown air"), or by using local expertise. Link to comment Share on other sites More sharing options...
davanne Posted November 6, 2010 Author Share Posted November 6, 2010 Thanks for all replies it is now working. It was a faulty switch. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted November 7, 2010 Share Posted November 7, 2010 davanne - 2010-11-06 1:40 PM Thanks for all replies it is now working. It was a faulty switch. Just out of idle curiosity - do you know what model of heater was involved, please? Link to comment Share on other sites More sharing options...
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