I have just received a reply on another forum which you may, or may not find interesting.
Having tried every trick in the book, (and I mean every trick) to resurrect an old RM 6402 the experts checking it over fianally gave up.
No one could tell me why the coolant failed to circulate untill I received the following post.
If an absorption fridge is left running for a considerable length of time it may cause the ammonia to overheat turning it from liquid to gas then to solidify preventing the matrix cycle.
What do you think, true or false?
------------- The longest sentence known to man is "I do"
I repair domestic appliances and there are some which have absorption units as opposed to compressors and these are on all the time.
The thermostat switches the unit off and on. If the thermostat was to stick on then on an aborstion unit it would run continuously, as there is no thermal cut-out, in which case, like anything, it would fail
Quote: Originally posted by cliffbrown on 06/11/2011
I repair domestic appliances and there are some which have absorption units as opposed to compressors and these are on all the time.
The thermostat switches the unit off and on. If the thermostat was to stick on then on an absorption unit it would run continuously, as there is no thermal cut-out, in which case, like anything, it would fail
jumping on board.my DEM 10 dehumidifier is working as normal to the ear ie.motor running but it is producing no water in the base container after many hours of use.is it due for the bin or can it be repaired????? thanks.
Post last edited on 06/11/2011 18:39:21
------------- the only silly question is the one you do not ask.
My friend who lives in my caravan has had the same problem. Her van is a 2005 and she lives in it so its running constantly. She was advised by a local dealer recently to remove the fridge and turn it upside down to mix the gases again but this never worked. If it does solidify this would explain why.
Many thanks for the link which at last has the info I needed, but where did you get the diagram from? Iv'e trid all catagories on the link without success.
I did find something similar on another site but although it gave a working diagram there was little info regarding the cause of failure
Thanks again Logan
------------- The longest sentence known to man is "I do"
Hi Logan, Almost right, it's not the ammonia that's causing the problem, in the mix in the cooling unit is chromate which is there to prevent rust inside the cooling unit, this can crystallise and block some of the smaller bore pipes, you can sometimes clear this by turning the fridge over for a couple of minutes which can clear the blockage, but of course the particles are still in the system and can block again.If the cooling unit is u/s then you can have the cooling unit replaced on some models of Dometic/Electrolux fridges but not Thetford.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.
Topic: Leisure fridge info
