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Subject Topic: Truma 3002 gas/electric heater concern. Post Reply Post New Topic
26/11/2012 at 10:07am
 Location: Bewdley Worcs.
 Outfit: Bailey Pegasus. Freelander 2
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Hi all. When were were away on the last half term break a few weeks ago, the gas side of the heater would not stay lit, but thankfully the electric aspect worked so were were just about ok with the at alone.

It would stay lit if I kept the 1-10 adjustment dial depressed, but as soon as I let it rise it would go out soon after. The ignition is fine and the batteries are good.

I decided it must need a clean out behind the cover, but couldn't take the cover off as I need a posi-drive screwdriver to remove a couple of screws on the front first.

Anyway, I got the front off yesterday and gave it all a good wipe down and vacuum. Replaced the front cover and turned the gas on. It seemed to fire up quickly although the pilot kept firing for a short time even after it was lit and running ok. The pilot settled down and the gas fire ran well for over an hour. So it seems that a vacuum did the trick, the I could not see what I had really done to get it going again!?

It wasn't on mains, so I should really see if the gas will continue to run once the electric is also running.

Any thoughts on the above description please? Would hate to be away in it ( as we might for New year) and not have the gas available.

Many thanks,

Nick


26/11/2012 at 12:44pm
 Location: Lancashire
 Outfit: Caravan now Sold
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possible faulty thermostat maybe.see video below it might help......

 

http://www.practicalcaravan.com/advice/how-use-truma-ultrastore-water-heater

contact gary arc systems he's our expert on fires and water heaters.

http://www.arcsystems.biz



Post last edited on 26/11/2012 12:52:26

-------------
the only silly question is the one you do not ask.


26/11/2012 at 5:34pm
 Location: West Mids
 Outfit: Swift Ace Statesman & X-Trail 2.0
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Personally, I'd suspect the thermocouple myself. This detects the pilot is burning and shuts off the supply if the pilot should go out; similar symptom to Nick's problem.

As Michael suggests above, a call to Gary would confirm or otherwise.

As for Nick's comment about being off electric hook-up, the presence of EHU is irrelevant in this instance as you're running the fire on gas only.

-------------
Paul

Every day's a school day!


26/11/2012 at 9:48pm
 Location: Bewdley Worcs.
 Outfit: Bailey Pegasus. Freelander 2
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Thank you both. I'll attempt to chat it through with Gary for an opinion and where to go from there :)

Nick


28/11/2012 at 10:15pm
 Location: None Entered
 Outfit: http: www.arcsystems.biz
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not rang me yet? still, I don't see how cleaning it did much but obviously it had some effect?

The thermocouple does seem to be at fault but this is not a fault this fires suffers from? if anything the 'cold' end where it screws into the bottom of the gas valve maybe loose?

I think the clue might be in what you say about ticking off and on now and again once you did get it lit?, perhaps a partly block jet causing a small pilot flame is at the route of the problem?

I will add and general cleaning aside, unless you know exactly what your doing, it's very possible to make things far worse by having a go yourself!


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28/11/2012 at 10:20pm
 Location: Bewdley Worcs.
 Outfit: Bailey Pegasus. Freelander 2
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Quote: Originally posted by arc systems on 28/11/2012not rang me yet? still, I don't see how cleaning it did much but obviously it had some effect?
The thermocouple does seem to be at fault but this is not a fault this fires suffers from? if anything the 'cold' end where it screws into the bottom of the gas valve maybe loose?

I think the clue might be in what you say about ticking off and on now and again once you did get it lit?, perhaps a partly block jet causing a small pilot flame is at the route of the problem?

I will add and general cleaning aside, unless you know exactly what your doing, it's very possible to make things far worse by having a go yourself!



Thanks. I have your number on my desk here, likely to call Friday or maybe tomorrow as I'm in the car a lot.

I decided very early on to leave it all well alone as it's not very serviceable to my untrained eye or experience. It really would not stay lit when we were away, but I was running it on electric so that just might have hampered it somehow? As I say it stayed lit after a bit of a splutter after the wipe and light vacuum inside the case, so maybe I did something that helped. Who knows. Itv was quite hairy as we have a dog in there (not in the fire, in the caravan).

How do we go about replacing a part and fitting it if that's what's needed? Do I find a gas dealer near me, will they be able to do it?

Thanks again, much appreciated.

Nick

Also to say that the idea of a partly blocked jet would fit in with the fires behaviour...to my untrained thinking.


29/11/2012 at 12:48am
 Location: Romford Essex
 Outfit: Swift Charisma 550 + Kia Sorento SX
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Itv was quite hairy as we have a dog in there (not in the fire, in the caravan).171717

love it.

Andy



-------------
QUECHUA Base Seconds 4.1 + Seconds Base (standard).



June/July(3 weeks) Le- Papillon, Tarn Gorge,France 2012.Aug/Sept (3 weeks)2012. Les Mathevies, Dordogne, France



30/11/2012 at 3:15pm
 Location: Bewdley Worcs.
 Outfit: Bailey Pegasus. Freelander 2
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Thanks to Gary for spending time on the phone with me going over the possible causes. The gas fire seems to have settled down after a clean out and I'll test it again this weekend a couple of times to ensure it really is sorted! If not Gary's phone will be ringing again ;)


02/12/2012 at 4:50pm
 Location: None Entered
 Outfit: Coachman Pastiche
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I'd agree with the thermocouple. I have come across thermocouples in the past that seem to spring back to life for a short period if they get a tap so the cleaning may have done the same. You can get universal thermocouples from heating suppliers for a couple of quid.

A weak pilot light could also cause this though as could the thermocouple being out of position so the flame is not heating it properly.


02/12/2012 at 6:26pm
 Location: Bewdley Worcs.
 Outfit: Bailey Pegasus. Freelander 2
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Just been out to the 'van for another play with the first to see if it started and ran well or otherwise.

Here's what I found:

With a new gas cylinder fitted, the pilot ignition sparked up promptly when I pressed down and turned the left hand dial on the fire marked 0-10.

I lifted the dial once it fired up and the pilot ignition flicked a few more times in a random manner. The fire lit up pretty well and I turned the fan on feeling happy enough only for the fire to go out after about a minute:(

So, I have a definite issue that can be repeated. Where do I go from here folks? If it's a DIY job I'll give it a go, bit the unit looked pretty well closed up to me when I took the front off. The 'van has not been serviced for a couple of years so can they address this sort of thing?

Also, are domestic gas engineers usually trained and equipped to sort it?

Thanks for the ongoing help folks!

Nick



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