There are no lit numbers on the temp control panel of my PFSS5NFXBSS French Door. Frig and freezer are both cool not cold. Can/should the control unit be replaced?

SOURCE: maytag french door frig - Freezer works, frig warm

sounds like the freezer fan motor is worn out

SOURCE: GE French Door Frig control panel blinking temp #s

I had a very similar problem with our GE refrigerator. The main control board looked to be the culprit. I took out the board and did a visual inspection. Upon inspection I discovered that the (2) 470 micro farad capacitors were blown. I checked the power diode near these and it was still ok. I went to Radio Shack and picked up two 470 micro farad - 35V capacitors for and grand total of $2.60 and resoldered them myself. The refrigerator has been running great since. If you want to know more details email me and I will be happy to let you know what I know. I didn't want to pay $100 for a GE guy to replace a board either!

SOURCE: New french door GE fridge that won't stay cold

If " new " is less than 1 year , you will need to call GE factory service , for a warranty repair . If any one else works on it , this will void your complete warranty , and they will charge you for a service call + parts + labor .

SOURCE: GE profile refrig cooling and freezing problem.

NOTE: This
is a multi-solution answer since I don't have all the tech from your question to pinpoint your problem
But the solution is in here generically, if you read and study the solutions very,very carefully.
First I would check cold control. Thats where you turn it off, if your temp is not warm. it can
be defective and not shutting off. If your temp is warm proceed with the following.
I would check the fan in the freezer. Listen to see if it is running
It moves air to the ref from the freezer
Then check to see if FREEZER CONTROL is turned WARMER WHICH MAKES THE REF COLDER AND VICE-VERSA. SEE?
The ref. temp should be about 33-35
The Freezer temp should be 0 to 10 Any thing below these temps is overkill and a waste of elect
The higher the number you turn it up to is the coldest
But is probably a common defrost problem The ice build up
is not being melted by the defrost system.The fan can't blow through the coils into the fridge.
Take out back panel of freezer to check for ice buildup. The coils should be clean.
There are three components to a defrost system- a heater,heater thermostat, and a timer unless you have a defrost electronic card.
Its best handled by a Technician but you could possibly do it by taking your model number to the nearest appliance parts store and asking for the parts. They are mostly located in freezer ,behind back panel on freezer coils.except the card which is usually located in ref The parts store will have info
Also check fan undernearh Ref in the rear
Clean condenser coils underneath
Make sure back cover is on the fridge. Some take them off and throw them away.
make one out of cardboard if its gone, using the holes of the old one.
.I'm including my article on Refrigerator Repair for your help and convenience.;
Please click or copy and paste into browser for Article

http://www.fixya.com/support/r5816737-fix_refrigerator_psychologically

If you need more help go here:

http://www.applianceaid.com/procedures.html

MORE TIPS AND TRICKS:
-----------------------------------------------------------------------------------------------------
STOP PAYING FOR EXPENSIVE WATER FILTERS FOR YOUR REF. DO THIS====
http://www.fixya.com/support/r9962087-stop_paying_high_price_refrigerator
-------------------------------------------------------------------------------------------------------
WATER SPLASHING IN FREEZER AT ICEMAKER
THE FILL TUBE IN BACK OF REFRIGERATOR CAN SLIP
AGAINST THE FILL RESERVOIR CAUSING A PARTIAL BLOCKAGE
OR BECOME CLOGGED WITH ICE.
REMOVE THE ICEMAKER AND INSPECT THE FILL TUBE.
RUN WATER IN TUBE TO ELININATE BLOCKAGE AND CHECK
TEMP IN FREEZER. IF TEMP IS BELOW 0 DEGREES, THATS
OVERKILL AND USUALLY A WASTE OF ELECTRICITY TO KEEP IT THAT COLD, NOT TO MENTION THE FILL TUBE FREEZING UP
----------------------------------------------------------------------------------------------------------------------
Thanks for using fixya
Leo Ponder
imufo2
Please VOTE FOR ME AND GIVE ME YOUR TESTIMONIAL IF POSSIBLE, IF THIS WAS HELPFUL
ITWILL BE MUCH APPRECIATED.