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 Post subject: Refrigiator problem
PostPosted: Sat Apr 01, 2017 8:04 pm 
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Hi!
Just about to take of for first trip in new (old) van!
This evening testing the fridge, it does not cool!!!
The flame is on, exhaust / funnel is slightly warm but seems to vary in temperature.
The van is currently being parker slightly inclined (Could that be a quick fix?)
There is no odd smell so the ammonia circuit should be intact. The burner was tested 1 month ago (with regards to proper emission) but not clean!
I've just bought the Van (talbot express '94) and know the fridge has not been used for a long time (perhaps years).
The fridge is a Truma RM4200. Read that cleaning the burner might be the issue. Any good guides? Should I do it myself? And more specifically how on a Talbot Express?
Thanks.
Best regards!


Last edited by JazzVan on Sat Apr 01, 2017 8:09 pm, edited 2 times in total.

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 Post subject: Re: Refrigiator problem
PostPosted: Sat Apr 01, 2017 8:07 pm 
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From my recent experience with a similar issue I found if the flame looks ok and increases as you turn it up to a higher setting the burner should be ok.

I was told on here to take the fridge out and turn it upside down for 24hrs. Haven't tried it yet as I've been so busy but many vouch for it.

As it hasn't been used for a while I reckon it is worth a go as mine hadn't been used for around 8 months when I first had the problem.

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 Post subject: Re: Refrigiator problem
PostPosted: Sat Apr 01, 2017 8:11 pm 
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Thanks for the reply, could you guide me a bit on how / where to see the flame and also how to take the fridge out?
Thanks


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 Post subject: Re: Refrigiator problem
PostPosted: Sat Apr 01, 2017 8:29 pm 
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It has to be level first, before you start taking it out.

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 Post subject: Re: Refrigiator problem
PostPosted: Sat Apr 01, 2017 8:58 pm 
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chrishart wrote:
It has to be level first, before you start taking it out.


Chris is right, i missed that part!

Even slightly off level can stop them from working.

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 Post subject: Re: Refrigiator problem
PostPosted: Sat Apr 01, 2017 9:06 pm 
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Wow, really!
Crossing my fingers as this would be a great quick fix!
Is that the same on external power (220 volt) that it need to be in level? And what about gas tank level - does it make any difference if it is about to be empty?
By the way, one month ago I asked the rv center on whether the burner should be cleaned! He mentorens that it shouldn't be necessary in case emisions are on spec! Is that so?


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 Post subject: Re: Refrigiator problem
PostPosted: Sun Apr 02, 2017 5:07 am 
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The van needs to be level for sure even on EHU.

Put the fridge on 12v and go for a drive and see if it gets cold.

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 Post subject: Re: Refrigiator problem
PostPosted: Sun Apr 02, 2017 8:23 am 
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Defo level. They can take quite a bit to get cool. Especially on gas. If we're gonna use gas or engine to run fridge I usually run on mains the day before to get it cold. Steve

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 Post subject: Re: Refrigiator problem
PostPosted: Sun Apr 02, 2017 8:43 am 
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a good test for these fridges is to connect the ehu for a couple of hours. preferably overnight as they do take time to cool.

if you remove the lower external vent you will see the burner possibly covered with a little metal box which is easily removed. Then you can see the burner flame. spiders and dust and rust dropping down the 'burner tube' (the vertical tube which eventually connects to the exhaust) can reduce the process although its a good sign that your burner actually lights.

The flame should be blue with no yellow. A yellow flame indicates a possible jet issue, if its very yellow it will smell strange. I replaced the jet on mine, its a little alloy piece which fits where the gas pipe is connected to the burner unit. On the jet will be a little indentation showing the jet size although a previous owner may have replaced the jet with the wrong part. A new jet made all the difference to my fridge operation!

The jet has a small hole in the centre which you are not supposed to attempt to clean out but ......

A good (and gas qualified) motorhome techie will be able to check all this very quickly.

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 Post subject: Re: Refrigiator problem
PostPosted: Sun Apr 02, 2017 11:04 am 
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A little further....
Moved it a bit to be in level (almost). It runs very well on main (220V) power. But on gas still no cooling. Flame keeps burning (can hear it and exhaust a bit warm, perhaps it should be warmer...?).
I have removed the outside grill so I can see the casing / house outside the burner.
I guess I need to remove this house but what should I do next? Where to blow air?

Thanks


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