MRT21PNBW3 Frigidaire Refrigerator - Instructions

Part Select suggested probable causes and supplied videos of how to make the repair of a 25 yr.old refrigerator along with the specific parts to order. I was about to trash the old refrigerator but after replacing the parts for a total of about $40 and 1 hour of time it works fine now.

with patience

Ordered new parts, removed old parts, put in new parts. Done.

bottom left cornerof fridge defrost timer replaced two bolts and a wire

According to the information from the parts select website the thermostat and the defrost timer where ranked number 1&2 as likely to fail and cause the condition experienced. To replace the Defrost thermostat just remove the freezer bins and the lower panel covering the evaporator. Remove the old thermostat, measure the wire lengths and install the provided crimp splices. Note: the heat shrink tubing is WAY over-sized and will not shrink to the size needed. You will need another means of sealing the wire connection. Install the thermostat and replace the panel and shelves. The timer is real easy. On my model it is located under the freezer door under the kick panel on the front. Simply remove 2 Phillips head screws, unplug the old unit and install the new one. Be sure to cycle the thermostat past the defrost cycle on the timer (rotate until an audible click is heard once for the beginning of the cycle and one at the end) so that the unit will start up when power is reconnected. This resolved my problem and the unit is working great!

One of the three top comments from other replys had similar problems, so I took their advice, since the prices were resonable, I went and replaced two parts instead of just the defrost timer. If I had to do it a second time I could probably do it all in about 20 mins.

dismantled the top rear panel of the freezer and found I had the wrong part. Hand started the fan motor and it has been working fine since.

Emptied freezer, removed fan motor cover (2 screws), removed fan and motor (2 screws), removed old motor from bracket and reassembled with new motor, transferred fan blade from old motor to new), re-installed new fan/motor (2 screws) and reinstalled cover...

1 went with maj 69% said defrost timer. NO. 2 went with second choice run cap NO. 3 went with my thought, ( PTC Starter ) why not, most exp part. Fixed the problem.

After reading other posts, I decided to change the defrost thermostat, so I watched the videos, and did that. It got better, but the problem persisted, and the ice was still building up in the freezer section. So I decided that the problem was with the defrost heater. I ordered a new one, that was here under 24hs (using the Fedex ground). I replaced it, measured the old one and saw that it was not passing any current at all (so it was really burnt). Now the fridge is good as new, maintaining the proper temperatures both at Freezer and Fridge sections. Thank you Parts Select ! With $ 70 in parts I was able to get back my appliance working !!!

first I replaced the timer control hoping thats the problem,unfortunately situation the same ice build up on the freezer.so I replaced the defrost thermostat.right now I'll still observing the condition if still the same.may be in couple days.so far its good.and to replace the parts is not difficult and easy.

Removed screws that fastened bracket to fridge. Next, I replaced the motor and carefully lined the brackets up so the motor would rotate smoothly. Put the fan blade on the motor and screwed the brackets back on the fridge. Motor kept popping out of alignment while I was screwing the brackets back in but I kept snapping it back in till it stayed.

it was great. I ordered the capacitor for my frigidaire frig and it arrived
in 3 days. plugged in the part to the compressor and my frig has been
working ever since. I spent 3 minutes ordering the part and 30 seconds
attaching it to the frig. Easy, very easy. saved myself a 75 dollar repair
visit. thanks

replaced the defrosting timer and saved a lot of $ by doing it my self.

Followed instruction vedeo from partselect. THANKS!!!!!