Hotpoint HM315NI Fridge Freezer (Non Auto Defrost)

[John Carroll]

I defrost the above every 4 weeks even though its not iced up. Normally, (via a plug in Energy monitor), when it cuts in the power demand is 90W to 100W and just before cut out,  is 83W, this cut out at a indicated 83W is very consistent but after a defrost the compressor will still run for hours (normally, 45mins) even though the power demand is down to 73W/75W and the fridge&freezer are both ~ 3C/5C colder, this is with the same stat setting which I keep at minimum, otherwise both would bee too cold, question is, why doesn't the stat open and shut off the compressor at its normal 83W which should pretty accurately reflect that the sensing capillary should open the contacts and should definitely open them at a power demand of 75W?.

I also noticed that if I switch off the power supply while its running constantly at 75W and then restore it that the stat  has apparently opened and will stay open then for ~ 30/45 mins and restart with a indicated power of ~ 95W. If I then leave it run for say 20 minutes or so and kill the power and then restore it, then, as expected, the compressor will immediately restart.

[SteamyTea]

I am not sure, but the refrigerant return temperature, back to the compressor, may be different, this may be cause the compressor to work less hard.

 

Is this a freezer or a fridge, and does the amount of 'stuff' in it vary i.e. you defrost it when it is empty.

I often defrost the fridges and freezers at work, but have only just started to monitor the temperatures properly, but I notice the two large chest freezers are a couple of K lover after a defrost (assuming the morons at work make sure the probe is placed correctly, don't leave the lid open and don't put hot food in them, but what do I know compared to a chef that thinks thermodynamics has nothing to do with cooking).