MRT21NSHW2 Frigidaire Refrigerator - Instructions

We were looking for a new freezer --thinking it wouldn't be worth calling a repairman. I was trying to determine the size of the freezer and couldn't find it in the manual. So I googled the model number and stumbled upon this site. Thought it would be worth a try and $12 plus shipping to replace the thermostat. Got the thermostat a couple days later, followed the video directions to replace it--not hard! Plugged it in and it is working great!!! SOOOOO glad I stumbled on your site! You saved us $700-$800!! Thank you! Thank you! Thank you!

take 1/4 hex screws out clean out dust ,remove old fan blade replace with new install bolts .

Removed front low grill, removed the two screws that hold the element in place. I then pulled the element out about 3 inches and disconnected the wires. Reversed process to install new timer.

Just removed the two screws and unpluged it.
Then I pluged the new one in and replaced the screws. It runs like a brand new reffrigerator.
Thanks for the fast delevery. Will do busness with you in the future.

Removed broken and installed nw part.

It snapped in place.

After testing and eliminating the temperature control and the timer as the problem, I turned to the thermostat. I had to wait for the ice buildup to thaw and then could remove the rear freezer panel (this was the 3rd time: first, to discover the ice buildup causing the problem, second when it came back after a complete thaw and test the thermostat, and this time to put the Partselect thermostat back in). My thermostat was visibly damaged from water melting into ice and expanding the casing and eventually breaking one of the connections. I connected the thermostat connection wires (not recommended) to get by while ordering the part, which shipped faster than local repair places could get it from their warehouses, and at a fraction of the cost. I'm really impressed with partselect's fast service and all the knowledgable customers who have explained how they installed them. I now have an intimate knowledge of how my fridge works and saved hundreds in repair, or twice that in replacement. Thanks!

removed screws with from the back panel of the freezer; located defrost thermostat attached to coil with a metal clip; unplugged thermostat and replaced with the new one. Put every thing back together and it works perfectly.

just like the video showed...it was excellent!!!

took 4 screws out of the discharge vent on top of the refrigerator section and unpluged the wiring harness and put the section on the counter and unscrewed the timer and put the new one in and reinstalled the assembly and plugged the Jack and put the 4 screws back in, and rotated the timer and put it on defrost removed the back and check the heaters and drain .

Parts Select is an excellent source for help and parts identification. I highly recomend them.
My first option was to replace the defrost timer.
After still getting ice and frost buildup in freezer I decided to replace the defrost thermostat.
Remove all shelves. Losen icemaker if applicable. Remove light cover and bulb. Remove all screws securing rear vertical cover. Carefully move back panel, disconnect icemaker and bulb assembly. carefully remove styrofoam cover at upper left and remove defrost thermostat. I tested the thermostat and found it was defective. It would not close circuit after being placed in a working freezer. Reverse procedure to replace thermostat.
This solved the problem

Replace thermostat and show and tell made it easy.

The instructions given to me by part Select were very good.I replaced the Timer- checked the heater with oham meter it was good- checked the door weather striping it was good and replaced the thermostat with new .So at this point I may need to call a professional unless some one has another solution.

First I removed the inner door which was easy and used a drill with a hex head driver to undo all of the screws behind the gasket. Trying to fit the new gasket on was a fidely nightmare. It's not too bad to get the sides on but the corners are very difficult. At first I had left the door on the fridge after an hours worth of swearing I took the door right off and laid it flat on a table. When I finally got the gasket all on, with a couple od small tears, I hit it with a heat gun and got most but not all of the wrinkels out. When I put the door back on the fridge it wouldn't close properly - gaps in the gasket. I leaned some weights against the door and it the gasket with the heat gun again. Gradually over 2 days it fit fairley well.

Unplug freezer let stand all night to defrost. Remove the tray cover which is located on the upper back area inside the freezer.( 3 twist fittings remove it ). Remove the upper stainless steel panel which is secured with 6 screws. This will drop down exposing the condenser. Note all the wires and fan will stay attached to the stainless steel panel, this panel will drop down no need to unplug anything. On the left upper side next to the condenser you will see the thermostat. Two color coded wires. Remove the thermostat and install the new one at the same location.