Truma combi 6e

BusyBuilder

BusyBuilder

Joined
Jan 31, 2016
Posts
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Location
Alness, Cromarty Firth
Funster No
41,524
MH
Hymer B534 DL (2017)
Exp
Well travelled
On way to France and truma not firing up on gas. Can hear fan then click followed by another click then shuts down, red light on control dial.
Gas to fridge and cooker okay, any ideas ?
 
not igniting by the sounds of it, either thermistor or jet issue.
 
They sometimes take a fair bit of purging the air from the gas lines. Have you tried it repeatedly?

They monitor the gas pressure more than cookers and fridges - is the pressure regulator ok on the bottle?

Have you got it on hot water and there is no water in the boiler?

I assume it works ok on 240v? Have you checked the 12v fuse?

Is there any fault codes?
 
Yep agree with that also, if mine has been parked up any length of time then it takes a few on / off twiddles to get it to ignite.

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Thanks, no able to try 240 till we get to France. Checked gas, and tap. Try switching fridge and cooker off too. Gas bottles full as just filled up.
 
Check the contacts on all the wiring and clean them if nescessary, we had a similar problem with our trumatic C (2002 vintage) it would come on, run for a while and then cut in and out and give us a flashing red light.
I disconnected all the harness plugs especially the ones on the circuit board and gave them a good spraying with contact cleaner and then pushed them on and off a few times to help clean the contacts.
This cured our problem, so maybe worth giving that a go if other suggestions don't work.
 
BusyBuilder said:
Sorted, the boiler has started now, after travelling down the road. ??? No idea why ??
Click to expand...

But next time you travel down the road it may stop working again.

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Well its stopped again
It is showing S LLLL SS L on flashing led on boiler. Any ideas ? It fires up then goes off after a minute or two, checked warm air coming from exhaust till it clicks off.
 
What control panel do u have?
 
just checking Truma fault codes for old style and found this hope it helps.
Good Luck.

121 s,l,l,l l,s,s,l combustion air motor running at incorrect speed
combustion air motor running at wrong speed /
flame unstable

check gas supply check flue system.
replace ignition plugs
– replace electronic PCB

 
BusyBuilder
Before you get any new parts try this.
On one end of the Truma is a slotted panel that clips on \ off. Opposite end from the heating outlet pipes. It's bottom right if you were looking from the end on and, maybe, around 6" x 4".
Remove this panel and you'll find the combustion air intake fan behind it.
Despite the slots the fan tends to collect dust \ hair \ etc and clog up.
Give the fan a good (careful) brush out with a dry small paint brush (1/2" - 1") and give it a manual turn. You might even have to give the spindle of the fan a light tap.
Hopefully, this will allow the fan to turn at the correct speed and clear the error message.
If this fails, you're back to KUSKUS suggestions above.
Hope it is the fan clogged up as the parts noted ain't cheap!
 
Thanks, we called in at Campingshow Vervaet at Lokeren. They checked the fault codes and said slow gas or blocked, may be because we drained the LPG tanks. We asked them to fit 2 filters to the lpg tanks, hoping it'll clear the gas pipes. Its intermittent and worked 3 times out of 5 goes at the garage. So we think they were right, we left gas/ hot water on and have driven about 85k downtown Tyne Cot cemetery bandits all working again. The fitter seemed to k ow this problem with Trumas, they only charged us for the 2 filters fitted for free.

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It's been ob and off for a few days now,the flashing changed twice giving us different codes each time. We ate in Germany now, around Bavaria so will call Truma to see if wecangeta tech to see it.
 
Others have previously reported similar intermittent problems when the issue was the gas regulator. Not experienced it myself. Filters sound like a good idea. I have a Truma filter on the regulator and have found oily liquid trapped in the filter body, if this had reached the regulator it could well have gummed it up a bit. Is it possible that your regulator got oiled up?
 
Possible, we have emailed a local Truma move service engineer so will hopefully get this sorted.
 
Truma fitter changed the gas regulator for new Truma Duo regulator and hey presto, gas pressure on cooker is up and boiler working much better now. He said regulator was bunged up with crud. Probably from gas. As we have filters on as well this shouldn't happen again.
 
Glad you got it sorted out and good to hear what the cure was, I'm sure it'll be useful to someone else in the future.
(y)

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Yes they also relieved us of €450. Don't know if that's good or not, we've noticed the cooker and grill pressure is up too. We hadn't noticed the pressure dropping over time.
 
Hi Guys I have a Truma boiler combi and it doesnt work the fan or heat on combined elec and gas the fan stops. Any ideas?
 
Any more info, like are you plugged into ehu at home or on a site, does the unit work ok on gas alone, is the boiler full of water ?
 
I am going to my motorhome to try and test it at the weekend so I will give more info then, when I was trying to put my heating on I was on site the highest setting it didnt work 1800w electric and gas the fan stopped. But when I put it on 900w elec and gas it did work but was only luke warm, although the outlet nearest to the boiler was the hottest.
 
Stevelacoste said:
I am going to my motorhome to try and test it at the weekend so I will give more info then, when I was trying to put my heating on I was on site the highest setting it didnt work 1800w electric and gas the fan stopped. But when I put it on 900w elec and gas it did work but was only luke warm, although the outlet nearest to the boiler was the hottest.
Click to expand...

I wonder if the site 240v supply did not have enough amps to run a 1800w Truma. Especially abroad some are only 6 amp supplies.

On the lower setting it would have maybe been a 1/3 of that and the output then would have been very Luke warm.

I wonder if you just have a gas problem only?

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I'm going to my motorhome later today I'm going to try different set ups to see what works best and report back. Thanks Guyss
 
If you want to test that the fan is working correctly & can run at fastest speed,
just set dial to hot water only @ 60 degrees & power source gas.

when orange light on dial goes out , water has reached temp, them move
dial all the way down to heating & hot water. The fan should run at full speed to cool the boiler, before the heating side starts.

I had a problem with the fan on mine, this was the test that Truma tech , told me to do to test the fan.

hope it helps.

Karl
 
Checked as you say and all well, thanks for the tip. Only problem I have is that some of the outlets don't blow as much air as some of the others. Think I'll try hoover up the pipe.
 
Check the security of the air trunking connections to the boiler, I have added extra fixings to prevent them coming adrift.
 

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