KitchenAid KRFC704FPS00 cooling problem


KitchenAid KRFC704FPS00 cooling problem

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Zandergray1
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Model:
KRFC704FPS00 

Brand
KitchenAid 

Age:
2ish Years

About 2 weeks ago I noticed the fridge didn't seem cool.  I checked the RC temperature and it was right around 55 degrees. FC temperature around 20. Ice maker production has been slow for several months with big clumpy cubes.

After searching the site I found technical service pointer #:W11033419B which seemed to apply. I checked the RC and FC coils and both were frozen, the RC coil much more so.  I thawed everything out and followed the instructions in the service pointer.  I verified the position of the thermistor, and looked for signs of cracks. It looks good.  Gaskets are in good condition and appear to be the ones in the pictures.  I replaced the main board with w11333076.  I have ordered an new ice maker and dual water valve per the service pointer.  The ice maker and valve have not yet arrived.

After installing the new board the fridge was resarted and left to cool for 24 hours.  Temperatures settled at 35 in RC and 0 in FC.  Both compartments partially full.  After a trip to the grocery store to restock both compartments were about 75% full with plenty of circulation space.  RC temps went up to around 50  and remained there for 3 days. FC stayed around 5 to 10.  I took everything out to look at the RC evaporator expecting to see ice, but none.  I reloaded the fridge and put in several ice blocks from a different freezer.  Temps came down to hover around 40 in RC and 2 in FC.  (set to 33 RC and -6 FC)

We are being very careful about opening the doors and some ice blocks remain in the RC. 

Can I get some advice or ideas on why this unit isn't cooling better?

Oh and I checked and cleaned all coils behind unit, dust is not an issue. Fans are all spinning.

As I said earlier ice maker and valve are on order and should arrive this week, but obviously not causing this cooling issue.



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Hello,
A couple of things regarding the icemaker. The freezer temp needs to be at 10 degrees or colder for the icemaker to function properly. This is likely why you are having little or no ice being made.
As for the not cooling issue, this could be a sealed system issue which only a certified technician can diagnose because they have to access the system to inspect the high and low side pressures to determine if the compressor is the issue or if the unit has lost freon caused by a leak. I won't be able to assist you on this one.





Zandergray1
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Thanks for your reply.

Is there any way for me to check the pressures with the right tools? Any other diagnosis I can do?


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You would need a set of refrigeration gauges . this is really something only a certified appliance tech should do. In many states you need a license to do this because you are working with refrigerant.





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Are there any other tests or checks I can perform before calling a service tech?  
Is the temp thermostat part of the main board?  Temps are now holding steady around 40 without ice added
Could the start capcitor be intermittently working?
Should I check the thermistor continuity?

Any other thoughts before spending lots of money on a tech?



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I am just afraid to offer advice on this one because I suspect the issue may be more serious or one that cannot be detected by the average person. I see in this forum many times where the customer tries to do more complicated repairs themselves and end up dumping a lot of money in something that a tech could of diagnosed and fixed in minutes.
Especially on these new appliances, there are so many electronics and computers these days and if there aren't any error codes then a skilled tech will run through the process of elimination.





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I haven't called a tech yet, but noticed that The temps seem to have stabilized this week to a consistent 39 to 42 degrees RC and 0 to 5 in FC but are set on 33 and -6.  


The compressor and fans are not running continuously so it seems whatever controls the temperature (thermostat) is satisfied and thinks it has met the set temperature.


What might cause this?


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Hello,

I apologize, for some reason I thought we covered this.. this is the sensor that reports the temp back to the control board.. it is possible it is reporting a false or incorrect temp reading causing the compressor to shut off early when actual desired temp has not been reached https://www.appliancezone.com/w10316760-whirlpool-refrigerator-thermistor/





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Is there a way to determine if it is malfunctioning or just replace and see?



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You would need to see what ohm reading that sensor should have.. I don't have that info off hand and I am not sure if Kichenaid will reveal that info or not 





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