Schreiber Type HI 1521 Model APM 6713. Thermostat problem.

[beberex]

Hi guys.

I`ve got two of the above fridges both built into a double housing. I think that they must be quite old as they were left when the previous occupants moved out some six years ago and we know that they had lived here for about twelve years and that they refurbed the kitchen in the nineties. Not sure if they replaced the fridges or not.
They both still work well but the problem is that the compressors on both machines seem to run almost constantly and there is a slight build up of frost on the back wall of both. If I turn the stat down and then back up again to the normal temperature the compressors don`t kick in again for some time but when they do they don`t seem to stop again. Have got fridge thermometers in both which indicate a temp of around 0c – 3c on average. This seems a little cold to me.
I think that the stats are working but possibly only one way. IE not recognising that the required temperature has been reached or is it possible that it could be something as simple as faulty door seals. There is some distortion of the door seals probably due to their age so they might not be making a good contact with the body of the fridge. Like I said earlier I think they are really old but believe them to be of good quality originally.
If it could be the door seals can they still be obtained?.
By the way – by “Normal Temperature” above I meant to say Number 2 on the stat.

Thanks for looking. I don`t really want to skip them but if thats my only option then Amen.

Dave.

[cockney steve]

Re: Schreiber Type HI 1521 Model APM 6713. Thermostat proble

Hi, Dave…..bit of a shot in the dark, here, but ’till the lone ranger and tonto turn up 😆

yes, your temps do seem a little low, but remember, there’s a “differential” (the temperature difference between cut-in and cut-out ) you should aim for about 6* C as a max.

Compressor could be running almost full -time because it simply can’t get rid of the heat it pulls out of the cabinet

(I’ve seen cooling-fans under/on the back of built-ins )……clean them , also the “radiator” (usually black) that is supposed to get that airflow -usually clogged with greasy dust and a load of fluff……

You could be right about the doorseals.try slipping a piece of paper over the cabinet-edge, close the door, see if the paper is gripped or it falls out.

compressors could be getting “tired”- although the whole unit is sealed with it’s lubricant and the refrigerant, wear still takes place in bearings and valves.

finally, the refrigerant -gas can “leak”..-even metal is porous and over time, gas could diffuse through..

try cleaning first! you’ll get a real efficiency -gain and save electrickery 🙂

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