whirlpool freezer Whirlpool Freezer evaporator icing up

[oldmanbill]

Whirlpool freezer Mod WZF34X18DW00 freezes fine for a week or two then evaporator ices up.

Internal tests run okay. There are no error codes.

All suggestions appreciated.

[Bintiwangu]

I'm sorry I can't be of much help old man bill but I am having the same problem on a wrs325sdhz 00. We've replaced a bad thermistor, eventually the board.

On manual defrost cycle the thing gets super hot.

They're telling me to replace the bi-metal but it doesn't appear to have one.

[TXtech]

On 6/27/2019 at 9:11 AM, Bintiwangu said:

I'm sorry I can't be of much help old man bill but I am having the same problem on a wrs325sdhz 00. We've replaced a bad thermistor, eventually the board.

On manual defrost cycle the thing gets super hot.

They're telling me to replace the bi-metal but it doesn't appear to have one.

Did you ever figure this out?  I have the same problem with a WRS325SDHZ01.  Thanks!

[Mr. Appliance of Mentor]

Exact same thing I am experiencing as well. Entire freeze evaporator coil is covered with frost infact it is so much that the evap cover is also submersed in frost.

 

I checked the gasket and both Fz and fridge gasket are okay.

I checked the Fz thermostat in cold water and it tested okay.

I checked the fridge thermostat and it also tested okay.

Checked the air diffuser and tested okay. (Fridge)

Checked evap fan and tested okay.

Checked evap heating element - tested okay.

 

Now, air is coming out of air diffuser but the air can't return to the FZ since it is full packed up with frost.

 

I am attaching some pictures, please have a look and if you have any suggestions please suggest.

 

Thanks,

Dee

[Nathaniel Peterson]

On 9/4/2023 at 4:11 PM, Mr. Appliance of Mentor said:

 

Exact same thing I am experiencing as well. Entire freeze evaporator coil is covered with frost infact it is so much that the evap cover is also submersed in frost.

 

I checked the gasket and both Fz and fridge gasket are okay.

I checked the Fz thermostat in cold water and it tested okay.

I checked the fridge thermostat and it also tested okay.

Checked the air diffuser and tested okay. (Fridge)

Checked evap fan and tested okay.

Checked evap heating element - tested okay.

 

Now, air is coming out of air diffuser but the air can't return to the FZ since it is full packed up with frost.

 

I am attaching some pictures, please have a look and if you have any suggestions please suggest.

 

Thanks,

Dee

UNPLUG REFRIGERATOR Buy a steamer $40 Bissell steam shot and defrost the panel that's frosted up. After you see the 4 screws holding the panel on remove them and steam around all the sides to be able to completely release the panel. Wear gloves panel is sharp. After you remove the rectangular panel (have to lift up a little to unhook from plastic tabs towards top) COMPLETELY steam out all frost while either soaking up all water with towel and removing back panel behind refrigerator to shop vac all water that going to flood the drain pan from all the water. Then look for a brown wire that possibly came off of the defrost heater and splice wires and wire nut together (put waterproof silicone caulk in wire nut to prevent water getting in). Then reassemble everything the way you disassembled. 

[Nathaniel Peterson]

On 9/17/2023 at 4:03 PM, Nathaniel Peterson said:

UNPLUG REFRIGERATOR Buy a steamer $40 Bissell steam shot and defrost the panel that's frosted up. After you see the 4 screws holding the panel on remove them and steam around all the sides to be able to completely release the panel. Wear gloves panel is sharp. After you remove the rectangular panel (have to lift up a little to unhook from plastic tabs towards top) COMPLETELY steam out all frost while either soaking up all water with towel and removing back panel behind refrigerator to shop vac all water that going to flood the drain pan from all the water. Then look for a brown wire that possibly came off of the defrost heater and splice wires and wire nut together (put waterproof silicone caulk in wire nut to prevent water getting in). Then reassemble everything the way you disassembled. 

 

On 9/4/2023 at 4:11 PM, Mr. Appliance of Mentor said:

 

Exact same thing I am experiencing as well. Entire freeze evaporator coil is covered with frost infact it is so much that the evap cover is also submersed in frost.

 

I checked the gasket and both Fz and fridge gasket are okay.

I checked the Fz thermostat in cold water and it tested okay.

I checked the fridge thermostat and it also tested okay.

Checked the air diffuser and tested okay. (Fridge)

Checked evap fan and tested okay.

Checked evap heating element - tested okay.

 

Now, air is coming out of air diffuser but the air can't return to the FZ since it is full packed up with frost.

 

I am attaching some pictures, please have a look and if you have any suggestions please suggest.

 

Thanks,

Dee

Did you check the thermistor on the evaporator coil also? Only thing left is the dispenser board and defrost terminators but I haven't figured out how to test the terminators yet. The display board on this model reports to the main board temperatures unlike most other brand where it just controls the dispenser.