• Please note, some of the links on our site are affiliate links (Learn More)

KitchenAid KRSC503ESS01 Side by Side Refrigerator - evap coil freezing solid on refrigerator side

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
A little, I’ll clean it up.
E3968E1F-8166-4F32-8761-CA419614D0E1.jpeg

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
Yes, it sure seems that way. Is there anything I need to watch out for when replacing the control board? I'll get one ordered.

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
I also measured temps on test 04 in service mode. I got the following:

Test Freezer Refrigerator evap coil
01- Home the valve 1.9 33
02- Close RC/FC valve 6.2 33
03- Compressor ON 6.2 32
04- Valve to RC pos+RC fan -0.7 38
05- Valve to FC pos+FC fan 5 22

Do these values appear correct? Or could this also be a control board issue?

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
For test 4, I used an infrared thermometer and for segment 01 where the valve is initialized I got 1.9 degrees in the freezer and 33 degrees at the fridge evap coils that you can see at the bottom.
For segment 02 and 03 no real temp change, I got 6 degrees in the freezer and 33 degrees at the fridge coil.
For segment 04, I got a decrease in the freezer down to -0.7 degrees and a rise in the refrigerator coil to 38 degrees
For segment 05, The freezer was at 5 degrees and the refrigerator coil was at 22 degrees.

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
Because I was opening the doors to measure temp with the IR thermometer, I repeated the test with a thermistor probe in the refrigerator evap coil and kept the door closed so as not to let warm air in skewing results and I got the following for test 4:

Step 01 - 33 degrees
Step 02 - 33 degrees
Step 03 - 33 degrees
Step 04 - started at 33 degrees, then dropped to 27 degrees
Step 05 - started at 27 degrees and kept dropping down to 18 degrees
After getting out of Test 4, temp came back up to 33 degrees.

Step 05 is the only one that I thought was strange, as the fridge evap coil kept dropping in temp until I ended the test.

JSS
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
43,611
Location
Murray, Utah 84107, United States
Oh OK, I got it. Kind of like Test 4A (Optional).... lol. So what did that tell you that you didn't already know? I can see where it's a double check step. That's cool!
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
I'm not sure how to interpret the readings I got. It appeared to function like it should steps 1-4 but it was strange on step 5, where the refrigerator evap coil temp kept dropping. Either there was some residual pressure getting through the expansion valve and dropping the coil temp since the fan stopped running on the fridge side (as per the test), or the valve keeps sending refrigerant to the fridge side when it is supposed to be going to the freezer only. I just want to be sure that replacing the control board will fix my problem.

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
Well, it froze back up. Not sure what to check next. The dual evap valve? I will also have to double check the door seal.

JSS
 

JSS22

Premium Member
Joined
Jul 7, 2021
Messages
20
Location
Northwest Florida
It began frosting on day 3, and then ice bridged across the fins after about 7-10 days and the fridge compartment temp rose.

JSS
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
43,611
Location
Murray, Utah 84107, United States
And that's with the cover installed, correct? I think we covered just about everything. You'll probably need to call Whirlpool and have them take a look at it.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
Wait, stop the presses!

I just located a service bulletin on this issue, but we need the serial number of yours.

SERIAL NUMBERS: Prior to HRX40

POSSIBLE CONCERNS:
In certain circumstances, consumers may experience warmer than usual temperatures in the refrigerator section, due to ice accumulation on the evaporator.
POTENTIAL CAUSES:
This concern can result from multiple possible causes including:
● Failed or restricted evaporator fan motor
● Faulty or mislocated defrost thermistor
● Poor door gasket sealing
● RC door not closing properly
● Air leaks within the air duct, and evaporator cover assembly.
● Evaporator fan not running long enough to clear frost.

Correction:

● Verify Proper operation of evaporator fan motor
● Verify proper placement of defrost thermistor
● Correct any door sealing issues
● Ensure there are no obstructions preventing the RC door from closing properly
● Verify Proper door alignment
● Install the evaporator cover correctly
If you have checked and ruled out the other possibilities listed above, then follow the steps below to correct the issue.
Inspect assembly of airflow parts, and correct as needed.
NOTE: If the evaporator cover is difficult to reassemble, this may indicate that airflow parts are not properly aligned and not sealing properly. Realign the evaporator cover for proper installation.
Refer to the table below and replace the HMI/User interface accordingly.
The new HMI/UI extends the run time of the evaporator fan to assist with the prevention of excessive frost build up.

For your model this is it:

Jake
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
Anytime Rick!

Jake
 
Top