I have a Prestige fridge/freezer model prt325ffcs, 18months old, and the problem is that the freezer compartment is not remaining cold , the super freeze function works reducing the temp. to -25 , but as soon as this is turned off the temp in the freezer rises , the freezer temp is set at - 18 ,but the temp rises until it alarms at -10 at which point I turn the super freeze function back on.the fridge is working normally , and the freezer is not making any abnormal noises. Any help would be great.

Many residential refrigerator / freezers are designed to work at temperature considerably above above freezing. Most modern refrigerator / freezer have a single electric thermostat - located in the fresh food compartment. This lone thermostat will control the compressor to keep the fridge (fresh food) section at the desired temperature (usually between 34 - 38 degrees F). The freezer will get colder regardless of how cold it is already whenever the fridge thermostat turns the compressor on.

Now that you see how the thermostat works, let's look at what happens when the fridge is placed in an unheated space - like a garage. In winter time, the temperature can drop considerably below 38 degrees. If the outdoor temperature remains cold enough, for long enough - it will affect the thermostat in the fridge. The temperature inside the fridge could drop below 38 degrees, preventing the thermostat from telling the compressor to turn on. Meanwhile, the temperature in the freezer compartment slowly rises from the normal -10 to 0 F degrees. It will continue to rise until it is the same temperature as the fresh food compartment or until the thermostat in the fresh food compartment tells the compressor to turn on again. This means the freezer contents will thaw.

If the temperature in the garage is even in the 40 to 50 degree range, the loss of cold in the fridge may not happen often enough to keep the compressor coming on often enough to keep some freezer items frozen solid - such as ice cream. Remember, water freezes at 32 degrees F, other products may require lower temperatures to remain frozen, and could thaw at 28 or other temperature.

Good luck!

First thing to check would be the fan in the freezer compartment, it circulates the cold air up to the refrigerator compartment

Classic symptom of: the connection passageway between the freezer and the fridge compartment
has closed off - usually due to ice buildup - or something clogging/blocking the passageway.
Your Refrigerator works by releasing cold air into only the freezer, then this cold air passes thru
a passageway into the fridge compartment to cold (but not freeze) the fridge compartment contents.
If this passageway is blocked, then just the freezer works, and cold air never makes it into the
fridge compartment. In the old days, you'd be told to defrost your freezer, since the blockage
was ALWAYS caused by frost buildup. Today, we have frost-free freezers, and your freezer may
simply have too much stuff inside - there has to be some room to allow some air flow around
items in the freezer, and whichever item is blocking the air passage to the fridge compartment -
just move it away from the passageway opening.

Hi,

Check out these tips...they can help you figure out whats going wrong with yourrefrigerator and why it is not cooling

Refrigerator not Cooling or Fridge not Cooling

How to Defrost Refrigerator Defrost Timer Problem

Water Running in refrigerator from Freezer

Refrigerator or Freezer not Cooling or Getting Cold
heatman101.

Hi,
There are a few reasons why the refrigerator part will not cool...here are a couple of tips that will help you to figure out why the refrigerantor is not cooling...

Refrigerator not Cooling or Fridge not Cooling
http://www.fixya.com/support/r3662945-refrigerator_not_cooling_or_fridge_not

How to Defrost Refrigerator Defrost Timer Problem
http://www.fixya.com/support/r3771673-defrost_refrigerator_defrost_timer

heatman101

HI!!

The little fan inside the freezer is the one in charge of blowing cold air into the fridge area, the freezer control (thermostat), regulates how cold it should get, and the Refrigerator control regulates how much of this cold air goes to the fridge compartment. It is important to keep the door gasket clean at all times in order to have a good thight seal.

Check:

1.- That the freezer and fridge controls are set correctly, acording to manufacturers specs. (a common problem arises when by accident, the temp. controls are moved out of preset adjusment.

2.- That the fan is working and sounds strong, (If you keep the freezer door open for a couple of minutes, you should hear and see the motor kiking in.)

3.- Find the vent(s) in the fridge compartment and feel if cold air is coming thru when fan is working. If fan is working and blows no air, Take the freezer's back panel off, (4 hexhead screws) just enough to see inside and check if the evaporator (radiator looking component) is covered with ice, blocking the flow of air towards the fridge compartment, if it is, your defrost thermostat and-or timer are defective.

Your temp control for the fridge when you first start it, should be a bit higher than the one for the freezer. (the freezer should be in the low-middle range.) This control is nothing but a actuator for a door that controls the flow of air from the freezer. The bigger the number, the wider the door opens, and the colder the fridge gets.

Once the system is stable, let's say the next day, you can re-adjust your controls, (don't expect an inmediate change right away, change one digit a the time and check again next day) If you set your fridge too high and the freezer too low, the freezer may loose coldness and the problem would invert.

Good Luck!!!

http://www.continentalrefrigerator.com/operations.html
Start with this web site. Has lots of manuals.
Hope this helps.

It sounds like the condenser coil might be freezing up. This happened to me on my bottom freezer. The cooling part of your fridge is only in the back of the freezer compartment. The cold air from the freezer blows up through a vent in the back to the fridge and comes out at the top. If the coils do not defrost (which is what happened with mine) the air flow is blocked by the ice and can't get to the fridge compartment. Your freezer will still be cold but your fridge won't. If you pull the plug on it and time things right you can defrost the coils but this will only postpone the problem. Both will work for awhile again until the coils ice up again. You can also pull out the freezer drawere and try to defrost the coil with a blow dryer. You have to disconnect the icemaker and pull out the back panel behind the freezer to get to it though.

Re. Zanussi ZK87/46EFS Fridge Freezer

The same symptom occurred in our fridge freezer. The fridge compartment warmed up whilst the freezer compartment continued to keep temperature.

The cause of our problem was diagnosed as a frozen sensor that controls a flap, that controls the flow of cold air from the freezer compartment up into the fridge compartment. We were advised to power off the fridge freezer (removing all food and trays from the freezer unit first), and to leave it to defrost for 24hrs. We needed to place a few towels on the floor of the freezer compartment to soak up the melt water. After 24hrs we followed the power up instructions in the manual (versions are available online if you have lost yours). Within a few minutes it was obvious that the fridge compartment was being cooled – Problem solved :)