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I have a Bosch upright frost free freezer. The unit should be at a constant -18 but recently the tempersture keeps getting warmer. Somone said to turn it off and start it up again. That did work but we are now having to do that more often to keep it running at the required temperature

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Defrost system is faulty.

take raer panel off inside freezer and check for ice build up melt off with a hairdryer.

with a multimeter, check continuity across the defrost heater and thermal fuse in series with it.

if these are ok, points to a fault with the main module

Posted on Aug 31, 2008

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I have a Kenmore upright freezer model number 253.9287413 manufactured '00 which has been a real champ. It's gotten a little 'flakey' the past month. Side are VERY hot, occasional water...


if you had to defrost a no frost unit the guess what you have a defrost problem. . i would thaw it out and replace the terminator on top of the cold coil . also ck the heater and replace if bad. .. if needed then replace the defrost control. ( adc) .. this will correct most problem with the ice problem .. mm .. mm

Jul 10, 2011 | Refrigerators

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Food defrosted in top of upright freezer


Hello,

Sounds like a defective defrost timer

If its a frost free upright freezer and the evaporator is frosting up with a snow like frost you have a defrost problem.. defrost thermostat, heaters, or trimmer



Dirty condenser coils are not the problem. It's most likely the defrost timer or defrost heater. The heater should come on about 3 times per day to melt the ice on the evaporator coils. If the defrost timer is not turning on the heater or the heater is burnt out, the coils will freeze up

Hope this helpout and Good luck

Jul 28, 2010 | LG LRTP1231W Top Freezer Refrigerator

1 Answer

Losing cold in both main and freezer sections. Constant "clicking" like a relay switch going off about every twenty seconds.


This sounds like your compressor start relay.
Located on the compressor usualy covered by a box.

Unplug the unit befor you start to explore.

Jan 07, 2010 | Whirlpool 24 7 cu ft Frost Free Upright...

1 Answer

Freezer compartment has frost buildup


This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 24, 2009 | Whirlpool GS5SHAXN Side by Side...

1 Answer

MAYTAG MZD2766GE SIDE BY SIDE


The freezer on top unit was keeping everything up top nice and cold, but the customer began to notice things in the fresh food section getting a little to warm. When the temperature selectors were adjusted to a colder setting, it seemed to help for a day or two, but then started getting warmer again. Sounding like a defrost problem, I paid this refrigerator a visit with hairdryer in hand, and parts in the van. Frost free refrigerators use a defrost heater to periodically assist with the melting of frost that builds up on the fins of the evaporator located in the freezer section. Frost forms each time the doors are opened to the unit, and the warmer, moist air from outside gets inside and heads toward the cold surface of the evaporator. As the frost continues to collect, the air passages in and around the evaporator start to close up and begin to prevent air circulation by the evaporator fan from the freezer to the fresh food section. As the cycle continues, the temperature in and around the evaporator will be cold, but the fresh food section will get warmer because warm air is not being exchanged with the colder air from above. The defrost sections of most units will consist of the same components. Namely, the heater itself, the bi-metal terminator, and the timer or defrost control. Each one of these components need to work properly for the defrost cycle to properly keep the unit frost free. On this unit, the timer could be advanced to begin a defrost cycle, but there was no current flow to the heater. After checking all connections and doing a quick resistance check of the circuit, I determined the bi-metal terminator had failed open. These bi-metal devices are used to prevent an overheating situation in the freezer section should the heater remain on to long. Once the trip temperature is reached, the bi-metal will open up a set of electrical contacts thus opening the circuit. Then when the unit cools back down to it's reset temperature, the contacts will again close, closing the circuit for the next defrost cycle. Because this bi-metal didn't reset, the circuit remained open and no defrosting took place. After using my trusty hairdryer and warm water squirt bottle to defrost the evaporator, I wired a new defrost terminator in line with the heater. With all the frost removed, the cold air started circulating again, and now everything within the fresh food section stays properly chilled.

Have a manual and can help you. Visit my site and enter your model number and part number in search feature. Click link below

http://servicepartstec.blogspot.com/

saebreezehvac@yahoo.com Thank You, Sea Breeze


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Apr 02, 2009 | Maytag MZD2766GES Side by Side...

1 Answer

Freezer not working


same problem but electronic temperture on in fridge but keeps flashing

Jun 17, 2008 | Bosch Classixx KGV28323 Bottom Freezer...

5 Answers

Bosch Classixx fridge / freezer


Hi - experienced this myself and spent ages trying to get to the bottom of it - only found one post but it worked and was absolutely clear on the cause nb: i'm not an "expert" !

My understanding of how the Bosch f/f works is that the freezer compartment generates the cold air for the fridge which is regulared at the fridge end . At the back of my fridge there are two "vents" which feed up this cold air up from the freezer into the fridge.

Problem happened to me because I left the freezer door slightly ajar which generated a massive amount of frost (sucking in the moist air from the house I guess then freezing it) and subsequent ice froze up the cooling ducts between the freezer and the fridge. Therefore, no matter how much I turned up the fridge thermo it never got cool. Only solution was to dump my frozen at a mates house and defrost the the FREEZER for a good 24 hrs +.

Worked tho' - fridge was completely back to normal.

PS: I understand this issue may also happen if you put too much unfrozen food into the freezer at one go and in working overtime to get it frozen causing a massive frost up again.

Nov 01, 2007 | Bosch Classixx KGV28323 Bottom Freezer...

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