Water heater using Gas.

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Water heater using Gas.

Post by Slaphead on Sun Dec 18, 2016 6:52 pm

We were selling at a car boot sale this morning and decided to take the motorhome in order to have comfort, toilet, heat etc. throughout the morning.

Unfortunately, the Carver gas heating refused to ignite, the red "gas" light always coming on after a few seconds.  I am sure I could hear the ignited clicking and the cooker and gas fire were working fine, so no problem with the gas supply.

Any clues as to the probable problem?

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Re: Water heater using Gas.

Post by roli on Mon Dec 19, 2016 8:43 am

There may be a rest button on the back of the fanmaster system (under wardrobe floor)

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Re: Water heater using Gas.

Post by Slaphead on Mon Dec 19, 2016 9:07 am

Sorry Roger, missed the word "Water" heating in the text although had it in the heading.  Or is the Fanmaster also involved with water heating?

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Re: Water heater using Gas.

Post by rogerblack on Mon Dec 19, 2016 10:20 am

Sorry if I'm teaching Granny to suck eggs but that sounds exactly like how our water heater behaves when I try to use it on gas and have forgotten to remove the cover from the flue on the side of the van.

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Re: Water heater using Gas.

Post by Paulmold on Mon Dec 19, 2016 10:30 am

If it's a Carver water heater then there is no flue cover but if it's actually a Truma then the flue cover was my first thought.

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Re: Water heater using Gas.

Post by meanchris on Mon Dec 19, 2016 11:11 am

On a van that age, (like ours was) it may be that either the gas jet is restricted or that the burner has rusted away and the gas is leaking out of the rusty ends.

You can buy new burners etc.

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR2.TRC0.A0.H0.Xcarver+burner.TRS0&_nkw=carver+burner&_sacat=0

It's an easy fix, if you have the required technical skills of course.

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Re: Water heater using Gas.

Post by Slaphead on Mon Dec 19, 2016 12:17 pm

Thanks for the replies, I think Meanchris is probably correct.  I was hoping it might be something simple.  I will get our local motorhome/caravan garage to have a look.  I will have a look on Youtube to see if there is a video showing work on the heater just in case it is within my skills limit.

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Re: Water heater using Gas.

Post by meanchris on Mon Dec 19, 2016 12:56 pm



EDIT:

It's very easy to look inside the Carver heater by taking the outer cover off, just 4 screws and then the inner cover which is 2 screws but has to be wiggled over the flue to remove it.

IIRC it's not sealed so there's little risk (Peter or Roli may understandably wish to interject with a disclaimer/warning) and I was able to try to light the burner with the covers removed to see what was wrong with ours.
When it's working properly it'll run quite happily with the covers removed, and it should light with the first spark once there's gas present.
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Re: Water heater using Gas.

Post by vwt4 on Mon Dec 19, 2016 1:52 pm

I have replaced two of these burner assemblies before reasonably easy to do two screws down the side of the gas valve remove those take care not to lose the small o rings and it should lift out
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Re: Water heater using Gas.

Post by Slaphead on Mon Dec 19, 2016 3:44 pm

Great video, thanks very much Meanchris, looks fairly straightforward.

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Re: Water heater using Gas.

Post by redturner37 on Mon Dec 19, 2016 7:06 pm

I was asked to check a Cascade heater out as it wasn't working. Took the outer cover off then the burner cover plate  and found the problem straight away. The asbestos shield clipped to the plate had been soaked with water, gone soggy and fallen onto the burner. Cleared all the soggy mess out and it fired up instantly. Refitted all the covers and away they went.....
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Re: Water heater using Gas.

Post by oakchipper on Wed Dec 28, 2016 8:49 pm

Hi,
I have a Medalion and had same problem.
I replaced burner 2 years ago.I think your problem could be the jet.I took mine apart ,removed the jet I used a sewing needle and gradually eased it through the hole in the jet.
now works fine with a good strong flame.

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Re: Water heater using Gas.

Post by Slaphead on Wed Dec 28, 2016 9:13 pm

Hi Pete,

I have not attempted any investigation work due to the time of year (and the weather) but intend to have a look when a bit kinder weather.  THanks for the info.

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Re: Water heater using Gas.

Post by mattpc on Mon Feb 06, 2017 12:03 am

It is very very easy to remove the burner module. This can be sent away for refurbishment and then you can refit it. I used these people

http://www.arelectronics.co.uk/contents/en-uk/d23_Carver_Cascade_Gas_Burner_Repairs.html

It's really just a case of undoing a few screws. If you are worried after you refit it, just get a gas safety check done but really it's just a case of undoing a few screws and then reinstalling them when you plug the burner unit back in. There are lots of videos and instruction lists on the internet that help you do it if you are unsure. Just remember to swtich the gas off before you start!!!
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Re: Water heater using Gas.

Post by Slaphead on Mon Feb 06, 2017 9:10 am

Thanks Mattpc, that's great information.

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Re: Water heater using Gas.

Post by Slaphead on Mon May 08, 2017 9:50 am

Just realised I did not report on the outcome of my water heater problem.

It was indeed a blocked jet and the heater is now working perfectly again.

Thanks for all the helpful advice.

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Re: Water heater using Gas.

Post by Gromit on Mon May 08, 2017 9:57 am

Well done Dave. Glad you got it fixed. up!

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