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Temp changes in freezer

Is it normal for refrigerator freezer temp to go from 0 or -10 to 20-30 degrees? things in freezer bags start getting crystals forming when temp goes up.

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If the temperature fluctuations occur (at least the ones to 20-30 degrees) at intervals of 6 hours or so then you are catching it in it's defrost mode which occurs on a timer. The timer shuts off everything except lights every 6 hours for an average of 20 minutes. This usually isn't enough to thaw things but I have seen it cause some crystale. Look closely at the back inside wall of the freezer for an accumulation of frost. If you see it there then you may have a defrost problem. Usually this is accompanied by steadily rising temperature in the freezer and fresh food secions both. The temps you listed (0to10) are fine. Good luck, AJ

Posted on May 22, 2009

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Freezer motor is running temp is 30 degrees


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Many times a freezer and/or refrigerator do not work right because of a dirty condenser coil...there are also many other things that can go wrong.


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What is the normal operational pressure in lo/hi side at the compressor of commercial freezer like dispaly case, reach in cabinet or other any low temp refrigeration uses 502 or408A/404a. is there any rule...


why yes there is. Generally speaking, the head pressure should be around the "ambient +30" rule.
That is, measure the entering air temp to the condenser, say 75 degrees. Now add 30 to that and get 105 degrees. Look at a P/T chart and see what the pressure is for that temp which is about 253 for R-404-A.
The evap on a freezer leads the load so, as a general rule, the evap temp is going to be around minus 10 degrees to get a 0 degree box. Coolers are different. So, the pressure for a minus 10 evap is around 25 or so. But the unit has to be close to operating temp. If the box is warm, naturally the pressure is higher. And what influences the pressure is whether or not it's a TXV or a cap tube system.
If a TXV and no receiver, charge by subcooling. If a receiver, fill by sight glass. If Cap tube, charge by superheat.
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Have defrosted my 210 cu.ft. upright freezer v2003rw3, do not have my manual to hand . At what setting on the dial should I put it at to start it up?


Every Refrigerator has its own "personality" There is no common
setting for any one refrigerator. I would start with 3
The real solution is what I have always told my customers
Get a refrigerator thermometer and a freezer thermometer
Refrigerator temp should be about 33-37 degrees.
Freezer should be about 0-10 degrees. below 0 is overkill

If this was helpful please rate me.
Leo Ponder Appliance-Tyler,Texas
imufo2@sbcglobal.net

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1 Answer

Temp. can not reach 0 degree.


things that need checking:
refrigerant level. Super heat. Condenser clean? Compressor effeciency.
These are things that an experienced tech can check. If you have some experience and gages/ tools, I can give you some things to do but most of this requires experience.
Let me know if I can be of any further help.

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Hi,Ihave had my electrolux fridge freezer for two years now and it is sited in my garage.When it gets really cold the freezer turns off defrosting everything,just found out if it drops below 10 degrees it...


Good day,
Not really. Domestic refrigerators are designed to operate in an environment where people live.
Most all manufacturers recommend that they not be placed in an area that goes below 55 degrees.
At any temperature below that it starts to degrade.
Cold enough and it will not work at all.
The reason is once the fresh food compartment reaches it's normal temperature of 33-37 degrees, it shuts the whole machine off.
That is by design, on any refrigerator like yours that has only one compressor and cooling fan motor.

As well, there are other issues. In that situation, the machine could well stay off 12 to even 24 hours.
The compressor has an oil sump in it, and the oil becomes very thick. When it finally tries to start, it creates a very stressful situation for the compressor, and could substantialy reduce it's life.

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Norlake freezer 6x6 not freezing enough


Normally freezers are kept at zero. Most health departments will not allow the temp to be higher than plus 10. If you want to store ice cream, you need to be at minus 10 degrees to minus 15 degrees.

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Evaporator unit keeps on building ice. question what is the nornal operating pressure on low side and on the high side for truee freezer using 404 refrigerant


I'll try to give you the "Readers Digest" version.
First, make sure there is no ice build up on the evap. Light frost is O.K. as long as it does not effect air flow. (Very Important). All fans need to be running. Again, an air flow thing. There should be some product in the box but not too close to the evap. Again, an air flow thing.
The expansion device can effect your pressures to some degree i.e. Cap tube vs. TXV.
As a general rule of thumb, which I use almost everyday when it comes to pressures:
Low side is based on the temp difference between evap temp and condition space in the box. In freezers, it is almost always 10 degrees. If the box is 0 degrees then the evap needs to be at a minus 10 degrees. That is a pressure for R-404A of 24.5 psi. This only holds true when the temp in the box is approching set temp. I would say, about +10 degrees. 0 Degrees for the evap for R-404A is 33.5 psi.
High side should be ambient temp +30 degrees and then convert to a pressure for the refrigerant.
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I would look at low side first to see if it is within reason. Don't let the high side get too high. Increases the compression ratio and overworks the compressor.
Your icing problem could be a defrost issue and not a refrigerant charge issue.

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