Schreiber/Hygena APM6325 SX Not Cold

[hewittrl]

Hi

I have read the post with the same title as the one I have given above.

I have the same issue, i.e. my APM6325sx is not cold. It is set at 5 and occationally it works fine but is never really cold. It will run like this for a month or so and then you will go to it and fine that the milk does not feel cold anymore and stuff in the fridge as gone off (lumpy milk anyone?). I have twisted the thermostat knob and it only clicks very close to the 0 position and this click turns off the light in the fridge so I suspect this is the “one/off” part of the T/stat and not the temp control bit.

The fan comes on every now and again but does not seem to stay on very long (5/10 minutes) and then is off for a fair while (an hour).

Generally in my line of work a thermostat either works or it doesn’t and therefore the fact that this sdeems to work (although poorly) for a period of time and then does not work for a few days is making me scratch my head a bit.

My question therefore is – has anyone experienced this before?, does this sound like a faulty T/stat. Does anyone have any advise on what to do to fix this.

[Dales-Electronic]

Re: Schreiber/Hygena APM6325 SX Not Cold

I think I would change the thermostat and see how you go.

[hewittrl]

Thanks for the quick reply.

As further information I can say that the compressor is not running excessively hot (only just above blood temperature just seconds after it has turned itself off). I can hear the fan motor running when the compressor is on but there does not seem to be that much air coming out of the front grill under the door, i.e. there is not enough air to disturb the hairs on the back of my hand (but I don’t know how much air should be blowing out so unsure if this should be able to be felt or not).

I have cleaned out the drainage hole in the bottom of the fridge and for some weired reason this seems to have helped and the fridge is cooling better (I am totally bemused as to why this is).

I am tempted to do what we used to do to Gas Fridges and turn the whole thing upside down for 5 minutes and then turn it over again but I suspect this only works on gas fridges.

To me things seem now to be pointing to a weak fan leading to a thermal trip of the compressor (but this is contradicted by the apparently coolish temp of the compressor), or a lack of refridgerant rather than a stat problem.

Has anyone got any further thoughts before I go any further and start dismantling the fridge?

[helo_75]

DO NOT turn the fridge upside down, it will never work again

again, i think a thermostat would probably cure your problem

[hewittrl]

I think you are right.

I have done some further investigation and electrical testing of the stat. On initial start up there is 240v between the upper brown wire to the stat (main 240v in) and the black wire leading from the stat to the compressor. After 5 minutes the 240v feed is lost on the black wire and the compressor stops. This shows that the stat is doing the switching and doing it far too soon.

I have taken the stat out (for those reading this you need to take the fridge out, then take off the electrical connections, take off the plastic control knob by plling it forward away from the stat, then lift up the stat body to clear the front mounting point and then pull the stat forward withdrawing the thermostat “wire” out of its holding tube). The stat “wire” itself is quite cold and shows no sign of corrosion or leakage. I have also noticed that th stat has two screw on the side for manual adjustment of its operating range. Has anyone ever tried adjusting these to see if would help bring life back to a tired set of Stat bellows and if so which one sets the lower temp set point and which oe sets the higher set point?

I am writing all this so that any one in the future can read this and hopefully understand how to diagnose a sta problem and then see all the posible ways to fix it including the method for chaging and or adjusting a tired stat.

Regards

Ritchard

[hewittrl]

Stat has been ordered.

Can I please just say thank you to this site and the guys at UK Whitegoods. You have really been first rate and quick to erespond to my questions. It is very rare these days to find a company like yours.

Many thanks to you and the guys above who have taken the time to reply to my dumb questions

(PS now can I have my new stat ASAP please?! – ha ha!)

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