Question about Nor-Lake KLF7766C Commercial Freezer

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Freezer thermostat was set at 0 degrees unit went down to -30 degrees. I increased temp on thermostat 3 degrees 3 times each over a 3 day period. The thermostat is not responding. I have the thermostat set at 10 degrees and it is -14 degrees and droping. I don't see anything else is wrong with the unit. Is it the thermostat that is bad.

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  • Nor-Lake Master
  • 1,144 Answers

I would start there. If the thermostat has an off setting, turn it there and see if it goes off. If not, try turning it to it's warmest setting while the box is cold to see if it turns off. To test to see if the relay/ contactor is stuck/bad, kill power to the unit (Unplug or turn off breaker). Disconnect one wire to the thermostat. Restore power. If unit runs, bad relay/contactor. If unit does not run, I'd replace the thermostat. Make sure the sensing bulb of the thermostat is in the conditioned space of the box or in the return air (intake) side of the evap so it can sense the box temp.

Posted on Aug 21, 2010

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1 Answer

What does the temp display on the freezer tell me?


unless this is a dedicated freezer only and not a side by side or over/under , there's no way it's going to get down too 0 degrees inside a warm home , nope not gonna happen

also its not good for you to set this there as compressor wont cycle properly there and entire freezer will ice up , then believe it or not it will get warmer not colder wastes a lot of power as well

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With the time as the compressor gets old the buzzing will increased, its not a bid deal, just set the thermostat to 1 during the winter, saves you energy and give the compressor more time to rest.

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How lpw of a temp. Can this freezer reach..and and if only 0 degree could the thermostat temp control be changed out so it could reach les than 0 temperatures like negative 20 or so?


There are different models made for holding different products. Yours has a 1/3 hp compressor for above 20 degs. It may have 0 on the thermostat and may well pull down that far, but -20 would be out of it's reach. Where as it's sister model is made to freeze to below zero has a 3/4 hp compressor. Larger compressor for the lower temps.

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Is this a commercial freezer? If so, it might be because you don't have proper ventilation for it. Commercial units put off a lot more heat than residential units. Turning the thermostat up to 86 degrees will make it even more difficult for this unit to not overheat.

Sep 07, 2010 | Freezers

1 Answer

It seems that the temp more often goes up to 20-30's and that food is not as frozen when I check it. When temp goes up I check it for next couple of minutes and usually within 10 min the temp is back down...


This is normal. All commercfial freezers must defrost 3 to 5 times a day, or they will freeze over at the coil and then stop freezing. A timer in your freezer turns off the compressor and turns a heating element on for 10 to 15 minutes. During that time the coil heats and melts frost from the coil. Usually within 30 minutes the temperature will briefly rise to 20 t0 25 degrees F and then quickly drop down to 0 degrees F. The food rarely defrosts in this short period of time..

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I have a Frigidaire model GLFU206FWA upright freezer. The temperature control won't go above 10 degree F. This causes freezer burn on some foods after a period of time. Is there a way to regulate the...


Good day,
Manufacturers of freezers do not give the option of running the machine much above that temperature. Normal operating temperature for a freezer is about -2 to about 8 above F.
Otherwise people could accidentally set the temp too warm and cause a loss of food.
Some appliance parts houses carry universal thermostats that could possibly cover the temperature range your looking for, but 30 degrees is far to warm to preserve frozen food safely.

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1 Answer

Freezer defrost cycle


If the defrost timer sticks in the defrost mode,yes. Normal defrost time is 30 minutes or less depending upon which timer is installed.
If it happens again,locate the defrost timer and turn the dial manually to see if the compressor comes back on. If so,replace the timer.
It is probably on the rear near the compressor. Some are under the front behind the dust guard.

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1 Answer

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It is probably the control board and since it's new it's still under warranty so a certified Frigidaire repair man will fix it without charge. There should be a telephone number with the paperwork you received when you bought it.

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1 Answer

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the users manual does not cover this particular issue as to the temperature swing. I have seen some thermostats that are the "constant on" type that you are describing. No way of telling from the vague manual. As long as you are not storing ice cream for a long period of time, 0 degrees is usually fine for most home applications. Sorry I can not give you more info.

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