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Evaporator coils are frozen , defrost heater is cooked , should I change limit switch again. this is 2nd failure since new. its a 1999 GE TFX22ZPBWW Thanks JT Automatic Transmission Rebuilder trying to fix refrigerator

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  • transjammer Sep 11, 2010

    thanks , think I'll stick to transmissions

  • transjammer Sep 11, 2010

    Yes Have to see what happens after I put the parts in

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  • GE Master
  • 19,396 Answers

Hi JT.

If you keep getting the problem I would replace the whole defrost thermostat kit :heater harness def asm (defrost heater kit with thermostat).

There is also a defrost thermostat in the upper part of the evap:thermostat def (defrost thermostat).I am not sure but I think this is not included in the kit. If this is not included in kit, replace it along with the rest. This last is part 240 in this diagram.

Also ensure that the fan is working , if the evap fan does not come up, you get the coils freezing and you may blow the element

Ensure also that the element is not getting energized all the time because of a contact. That is not a common fault in fridges but you never know ( that is rather common in dryer and washer where vibrations and rust easily cause wiring contacts).

Here all parts and diagrams.

Posted on Sep 11, 2010

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Model GSS25SGMCBS coil freezes.heater checkedout ok service man changed the circuit board for $312.After 3 days, same problem again. Freeze temp ok but refrigirator sectio quit working after coil freezes....


Hello,
Control board is new, heaters ok, Check defrost thermostat and thermisters located on evaporator.
PC board not getting information to defrost properly.See site below

Also check the fill tube at ice maker . Iv'e seen these get loose and fill evaporator with water causing ice block

good luck




GE Refrigerator Repair Guide

Aug 16, 2011 | GE GSS25SGMBS Side by Side Refrigerator

4 Answers

Ice develops at back of fridge


hi chris
dave here hope i can help

I would test the defrost timer, defrost heater or defrost limit switch

TESTING AND REPLACING THE DEFROST TIMER
This timer activates the heater that melts frost in the evaporator for 10 to 20 minutes every 10 to 12 hours. In the process, it turns the compressor off and on. If it fails, the compressor may not run. Or the heater may not go on, eventually causing a hidden ice buildup that blocks the cold-air flow and disables the evaporator fan. An access hole lets you test the timer. If the timer isn't in the control panel, look behind the front grille or behind the rear access panel. If the compressor fails to run turn the timer until it clicks. If compressor goes on, timer is faulty. If unit isn't defrosting automatically and turning timer stops compressor or fan, timer is faulty.
Before replacing timer, spray it with electrical contact cleaner through access hole and turn it a few times. Stop just before a click and wait to see if timer advances on its own.
To replace timer, unplug the refrigerator and open control panel. Remove screws holding timer to panel and pull of leads. If wires aren't in a plug, move then one at a time to new timer.

EVAPORATOR AND DEFROST HEATER
In a frost-free unit, the evaporator coils, their fan, and the deforst heater are located behind the freezer's back wall or under its floor. The fan, which circulates cold air between the coils and the two food compartments, is controlled by the door switch, the thermostat, or both. To check the fan, open both doors, wait for the compressor to go on, and hold in the door switch. If you can't hear the fan running, test the fan(below).
The defrost heater, which melts frost on the coils, is cycled on by the defrost timer(above). If the frost melts before the end of the defrost cycle, the defrost limit switch turns the heater off. The heater may be a metal rod, a wire wrapped in foil, or a coil inside a glass tube. All are tested the same way. Test terminals for the heater are often located in the control panel or under a doorjamb; check the wiring diagram. Or test the heater leads inside the evaporator compartment.

TESTING THE EVAPORATOR FAN
To remove the evaporator fan, unplug unit; open back panel(or floor) of freezer. Then unscrew housing holding fan, and take off leads going to fan motor. With VOM(Volt-Ohm Meter) on RX1, probe motor terminals(except green ground wire terminal). Look for moderate resistance(50 to 200 ohms). Replace fan if much lower or infinity.

TESTING THE DEFROST HEATER
Open control panel. With VOM on RX1, probe test terminals. Look for 15-to 100-ohm reading. If infinity, turn defrost timer(as above); retest.

TESTING DEFROST LIMIT SWITCH
Trace and disconnect leads. With VOM on RX1, probe leads. Look for infinity reading when switch is warm, zero after 20 minutes in working freezer.

Hope this sources your problem
Thank you for using Fixya.com

Jul 20, 2008 | AEG Santo U 86000i Compact Refrigerator

1 Answer

Refereigerator Model GBE18JBRWW, bottom freezer Not cooling properly. I opened the condensor coil sections and noticed the frozen ice. Disconnected the refereigerator for few hours and the refereigerator...


You have a defrost system problem. The coils with the ice are the evaporator. If the fan is working inside either your defrost timer or defrost heater assembly has failed. you may want a tech for this

Jun 22, 2011 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

The freezer fills with water and overflows about once a week.The food is partially frozen and the ice is clear and wet. The fridge is cold and no problems but the freezer doesn't fully freeze and water...


your evaporator coil in the rear area behind the freezer back panel is frozen over with ice and the coil can no longer deliver cold air due to ice blocking the air flow from the evaporator fan,remove this rear panel,defrost it with a hair dryer,check the defrost heating coil for continuity,they go bad regularly,if not the heater coil under the evaporator coil,it may be the defrost timer in the refrigerator section of the unit that powers the defrost coil that needs replacement

Jul 25, 2010 | GE 22.3 Cu. Ft. Bottom-Mount Refrigerator...

1 Answer

GE model# TFS22PPDA side by side. Evaporator has frozen up.


no it will for about 5-7 days and it will frz up again, id say u have a defrost problem, could be your heater (can be ohmed out) or defrost thermostat (cannot be ohmed out. ) but if top of defrost thermostat is bulged up then its bad, and third is your defrost timer, one of those is bad not defrosting the icebuild uo every6-8 hrs your unit will go ina defrost. hope this helpsi

Sep 23, 2009 | GE Refrigerators

2 Answers

Top section not cooling on GE Side by Side


IF the evaporator is frozen then the defrost is not occuring. Probably the heater or the defrost thermostat.

Sep 10, 2009 | GE GSH22JFT Side by Side Refrigerator

1 Answer

GE regrigerator freezer is frosting up in back and in not keeping items frozen G E Modle GTS18DCPWUWW serial # AM549810


How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php
If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.


Sep 02, 2009 | Refrigerators

1 Answer

Freezer runs at 20 below and refrigerator runs at 60 ge profile


Most likely the defrost heater is burned out below the evaporator coil. It will be easy to spot because on the profile the defrost heater has a glass tube covering the element inside. You will need to defrost first before you will be able to see anything. If you replace the defrost heater also replace the defrost thermostat, Thanks, Sea breeze

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3 Answers

DEF appears on freezer door and freezes up.


deF error means that you need to defrost the unit. Leave the unit unplugged overnight and defrost completely.

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