Truma combi not working on elec (1 Viewer)

May 7, 2016
7,187
11,610
West Sussex
Funster No
42,951
MH
Carthago Compactline
Exp
Since 2003
Thanks I've gone for 10 'Fuse 5x20mm Slow Blow CERAMIC BODY Multi-Variation Listings' from eBay with type 'T10AH250V' for princely sum of £3.31. So not too costly a mistake if not right.
I think you have the correct fuse.
 

PennyBenimar

Free Member
Mar 30, 2020
5
2
Funster No
69,706
MH
C Class
Exp
Newbie
Fuse replaced and clears error code. Now to see how long it lasts. I could take advice above about start heating on gas and then switch to EL 2. Some other site suggested run off EL 1 instead of EL 2. I'm currently connected to UK mains. In this case is there any difference between using EL 1 and EL 2?
 
May 7, 2016
7,187
11,610
West Sussex
Funster No
42,951
MH
Carthago Compactline
Exp
Since 2003
EL 1 = 900W, EL 2 = 1800W. However the 10A fuse should be able to cope with either, 1800W / 230V = 7.32A.

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L&J

Dec 1, 2014
8
3
Mullion, Cornwall
Funster No
34,403
MH
C Class
Exp
Since 2016
I got quite excited when I first saw this thread, as I have a very similar problem with my Truma 4e. Everything works fine on gas, but nothing on 230V. I managed to get at the hidden fuse and..........it was fine, not blown :-(
There is no error indication, no error code flashing so the Truma is happy and thinks it is doing a great job. On the remote control panel everything looks as it should, with no fault indication. But still no water or space heating on 230V. Has anyone come across this?
 
Feb 4, 2009
61
84
Vale Of Glamorgan
Funster No
5,556
MH
Autotrail F70
Exp
2005
I got quite excited when I first saw this thread, as I have a very similar problem with my Truma 4e. Everything works fine on gas, but nothing on 230V. I managed to get at the hidden fuse and..........it was fine, not blown :-(
There is no error indication, no error code flashing so the Truma is happy and thinks it is doing a great job. On the remote control panel everything looks as it should, with no fault indication. But still no water or space heating on 230V. Has anyone come across this?
Hi yes I had the same problem the fuses looked ok but it would not work. So I decided to change both fuses on the boiler anyway, and it's been working ok since.
Peter.
 

MikeD

Free Member
Dec 21, 2011
3,936
3,697
London
Funster No
19,230
MH
IH PVC
Exp
Since 2012
Is there not a red reset button at the upper area of the boiler?
Have u tried this?

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Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
I have the same problem. 2012 Burstner T620G Travel Van. Have checked the conductivity of both fuses and pressed the reset button but still no mains function. The green light behind the temperature dial flashes a few times when I switch off but nothing else. I’m beginning to believe the electric isn’t supposed to work as I was told it is gas only heating when I bought it privately.
 

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Feb 9, 2008
4,086
5,902
SW Scotland
Funster No
1,453
MH
LP Coachbuilt
Exp
Since 2008 after caravanning for 20 years
The label shows it is gas and electric, (900/1800w). The selector switch also show one/two elements. Most likely the two elements are blown.
 
Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Sounds plausible. Also expensive?

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Oct 10, 2018
1,959
1,098
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
Robert1351 Is the separate 240v supply (Via the EHU) to the combi switched on ? There should be a on/off switch somewhere for this and also a trip switch. The controls and lights on the combi settings display are 12v operation .
 
Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Good question. All trip switches are on. I wonder if there’s anything on the unit under the passenger seat. Can’t think of where else a switch or cut-out might be. The red button want up. Thanks I’ll snoop around tomorrow. It may be possible that both elements blew at different times. The vehicle did spend a rainy fortnight in Portugal, I’m told.
 
Jun 16, 2014
655
2,440
NOTTINGHAM
Funster No
31,988
MH
Autotrail Savannah
Exp
Almost a Newbie but not quite now.
Robert1351. We woke up last year to find the electric off in the van. First thought was we had tripped the site bollard but found we had tripped our consumer unit. Reset it and all ok apart from no hot water from boiler on electric. Started it up on gas and all seemed ok. On return I checked it out and the elements had gone. In all honesty one may have been gone for some time as it took ages to warm both water and heating systems.
Over the summer I managed to change both elements and they were both u/s. Took a day and a half to strip/rebuild but all working now. This is on a 10 year old van and as previously posted,, they are designed for around 10 years of motorhoming use.

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Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Ah. Thanks Bertiebasset. That could be useful. I’ve also noticed that I’ve set the controls wrongly. There is no water in the system so I can’t check that but I think I should at least try setting the source to gas or mixed but turn off the gas just to see if the fan starts working then.
 
Oct 10, 2018
1,959
1,098
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
Robert1351 I have just checked the combi controls on my van and it seems that if the orange light is on ,as yours is , at the power source control , then 240v is getting to the combi unit so it seems the problem may be , as you thought , the elements (or the PCB in the unit) and not a 240v supply switch not being on as I thought it could be.
I do not know if you are aware but there is a , How to replace a Truma Combi heating element article , put on by Abacist , in the Resources section on the top line of this page , (Motorhome technical articles) which may help if you decide to replace them.
 
Jul 1, 2010
3,191
32,323
SW Northumberland
Funster No
12,394
MH
Hymer B 588 DL
Exp
Since September 2010
5 year old van Combi 6E elements failed purchased these elements on advice from a fb group £160 from Truma they are twice the price and come with a full gasket set which are not needed. I had my local Caravan Service centre fit them the old ones can distort over time and are difficult to remove as they are a very snug fit in the heat transfer fins.

<Broken link removed>

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Apr 22, 2018
6,779
12,489
Herts.
Funster No
53,503
MH
Adria Coral lowline
My boiler does the same as you describe Robert1351, and for me it is due to failure of the electrical elements. I just now use boiler via gas. The boiler actually works better, and quicker via gas anyway, I'm also not overly bothered by gas usage as I've got refillable cylinders. The cost of the elements and possibly their fitting will buy a lot of gas, and remember they are only used when on site with hookup anyway.
 
Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Thanks Andy and Stewart. I have reluctantly arrived at the same conclusion. I was aware of the problem when I bought the van but thought it was because it had a gas only heater/boiler. I’ve only had it a couple of days and thought it would be worth asking around and checking the fuses when I saw which boiler it actually is. With the price of Calor being what it is it might have been worth it but, alas, I think not.

Another reason to not use expensive sites. There is an oil filled radiator aboard, with an extra one in the wardrobe so we’ll probably survive overall. If my mobile service man says he can fit them I might be tempted by the reasonably priced ones Stewart suggested.
 
Apr 22, 2018
6,779
12,489
Herts.
Funster No
53,503
MH
Adria Coral lowline
It may be worth checking when you’ve got water in the boiler as the heater via electric elements is really poor anyway. You may have only one of the two blown. You could possibly check them simply by using a clamp meter.

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Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Thanks Andy. The clamp meter idea sounds interesting but I might go economy and wait for ages once there is water on board. If the electric water heating function is a bit weak anyway I’m leaning towards using gas to heat water when required for the time being. (The greater priority at present is the timing belt.) Time will tell.
 
May 7, 2016
7,187
11,610
West Sussex
Funster No
42,951
MH
Carthago Compactline
Exp
Since 2003
Robert1351 when you say you have checked both fuses I assume you mean the 12V one at the top of the circuit board and the very awkward 230V one lower down the board under the lower cover.
 
Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Yes, that’s right. Took the front cover off for the 230v slow blow one.

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DuncanRowe

Free Member
Aug 10, 2022
6
1
Funster No
90,504
MH
Fiat Ducato Chausson
I seem to have a similar fault. Heater works on gas but not electricity. Just tested both fuses but both good and 240 vac at reset switch is good. Any ideas. Is it likely to be the element and if so what error code would I get
 
Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
Don’t know about error codes but I’m presuming it’s the element. Saw a replacement about £160 on eBay but a lot of hassle to change. I’m not bothering. Convector heater and warm bedding if on hook up. Gas if not. Gas for shower if required. I’ve read that electric water heating can be slow. I’ll think again when the weather gets cooler, now that gas is more expensive.
 

DuncanRowe

Free Member
Aug 10, 2022
6
1
Funster No
90,504
MH
Fiat Ducato Chausson
Thanks for reply. Just doing final checks before I decide to repair. No fault codes and doesn’t draw any power when on electric. Going to try and measure heater element resistance

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DuncanRowe

Free Member
Aug 10, 2022
6
1
Funster No
90,504
MH
Fiat Ducato Chausson
Removed 240V power only. Measured the resistance between live and neutral wires. Remain very high when system switched on (12V) for both single and 2 electric only settings. If internal switches operating correctly I think I would expect to see resistance fall to about 60 ohms. That is the resistance of the heating elements. So looks more like element failure to me. Unfortunately next move is to take whole system out to get access to elements as it is all a tight squeeze.
 

DuncanRowe

Free Member
Aug 10, 2022
6
1
Funster No
90,504
MH
Fiat Ducato Chausson
Took heater out of bay.biggest issue was removing push fit water connections. removed covers and wires from end of heater elements. High resistance as expected, so trying to remove.
This is proving hard work. They moved a few inches but are firmly gripped in. Didn’t show that on video. So any hints accepted? Will keep working on it

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Sep 11, 2021
86
41
Shropshire
Funster No
84,102
MH
Burstner Travel Van
Exp
25 yrs tugger, new to MH-ing
I’m sorry I can’t help you with that. The video I watched seemed quite involved in removing the elements. I wish you well.
 
Jan 28, 2008
10,104
18,259
Dovercourt, Harwich, UK
Funster No
1,353
MH
Renalt burstner
Exp
7 years campers before that
on another thread here someone decided t was the fins not holding the elements tight that caused them to fail and crimped them together on the elements to make a better seal
 

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