Despite replacing both the control board and thermistor, my Amana ABB1924BRB01 refrigerator still won't cool below 45°F, even when set to the maximum setting

Refrigerator & Freezer Repair
1

Please make sure to click on General above and select the correct appliance type first.

Brand: Amana
Model Number:ABB1924BRB01
Main Symptom: Refrigerator set to max coldness but only goes down to 45 degrees
What happens & when:

Error Code (if any):
Parts or tests already tried:
Photos / video link:

2

Have you checked the actual temperature in the freezer section and the functionality of the damper to make sure it is opening?

3

Thanks for the reply!
The freezer is working perfectly: it’s currently set to 4 out of 7 and holding at 0°F. I haven’t checked the damper control yet, but that’s next on my list. I’m also trying to locate a replacement damper control and evaporator fan motor for the ABB1924BRB01 model, but haven’t had much luck finding parts.

If anyone has tips for checking the damper, like how to access it or test whether it’s opening properly, I’d really appreciate it!

4

The damper control is AP6023300.

https://www.appliancepartspros.com/whirlpool-control-wpw10594330-ap6023300.html

The evaporator fan motor is AP6015419.

https://www.appliancepartspros.com/whirlpool-motor-evap-fan-wpw10128551-ap6015419.html

I’ve also attached a copy of the tech sheet so that you can use the diagnostics mode for testing the damper control.

tech-sheet-w11297589-revb (1).pdf (330.1 KB)

5

Thank you for the parts number and the tech sheet!

6

Hi Rory,

Thanks again for providing me with the tech sheet—I really appreciate it.

I wanted to give you a quick update. I ran the damper control test in service mode. I set it to the “C” position and waited a minute, then switched it to the “0” setting and waited another minute. Unfortunately, the damper never opened.

Since then, I’ve manually pried and propped the damper open, and I could immediately feel cold air coming through. I’ve ordered a replacement damper control and will install it once it arrives.

Thanks again for your help!

7

Hi Rory,

Just wanted to share a new update. The damper door ended up closing, along with the item I had wedged in there. I removed the wedge and ran the damper control test again, and now it opens when set to “0” and closes when set to “C”—so the control seems to be responding correctly.

However, with the refrigerator temperature at 49°F, it appears to want to keep the damper closed.

UPDATE: I waited about five minutes and peeked inside, and the door had reopened, allowing cold air to flow in.

Let me know if you think this behavior is expected or if there’s anything else I should check.

Best,
Aaron

8

Hi Rory,

Quick follow-up: I waited 20 minutes and checked the refrigerator again. The temperature is now down to 44°F, but the damper door is closed. The Refrigerator setting is set on 7, its max setting.

Before posting in this thread, I’ve already replaced the control board and thermistor, and reprogrammed the new control board. Given that, I’d appreciate your thoughts on what I should check or consider replacing next.

I’ll let it run overnight and post an update on its behavior in the morning.

Thanks again for all your help so far!

Best,
Aaron

10

Let me know what it does, you may have freed it up when you pried it open.

11

Hi Rory,

The freezer is set on (4) and is showing 0°F and the refrigerator is still set to the max setting (7), but both thermometers inside the refrigerator are reading 43°F. When I first opened the door this morning, the damper was closed. After keeping the door open for about 30 seconds, the damper opened as expected letting in cold air.

I know it would cool more if the damper stayed open longer, but I’m not sure why it isn’t. Any advice would be greatly appreciated! Thank you

Best,
Aaron

12

Are the thermometers you’ve got in the fridge just set in there? And do you have anything in the fridge at the moment?

13

Hi Rory,

I’ve got one thermometer sitting on top of a Tupperware container and another placed directly on the shelf. The refrigerator is about 35% full, and the door compartments are roughly 80% full.

Best,
Aaron

14

Ok, you might not be getting accurate temp readings that way. Set a glass or bottle of water on the middle of the middle shelf in the fridge section and let it get down to temperature, or you can use another liquid that is already in that area. Test that liquid temperature with a thermometer.

If it is still too warm you might need to adjust the fridge performance using test 7 (FF Performance Adjustment) in the service mode.

15

Hi Rory,

I started with just the glass of water on the middle shelf, but the temperature didn’t change much. So I ran the FF Performance Adjustment (Test 7) in service mode and set it to 9.

After letting it stabilize, the water temperature is now reading 40.3°F, and the freezer is showing -8°F. The current settings are Freezer: 4 and Refrigerator: 7.

Thanks again for all your help, it’s been incredibly useful throughout this process. What would you recommend as the next steps from here?

Best,
Aaron

16

Hi Rory,

Just wanted to give you a quick update the fridge is now holding steady at 37°F after I ran the FF Performance Adjustment (Test 7) in service mode and set it to “9” I let it settle for a bit, and that seems to have done the trick!

Thanks again for all your help and for providing the tech sheet and part numbers. Your guidance made the troubleshooting process much smoother, and I really appreciate it.

Best,
Aaron