MRT21GNBY0 Uni Refrigerator - Instructions

thanks to all of the people who had the same problems I was able to make a quick fix on my fridge. I pulled the back cover off and found the compressor not kicking on so I replaced the start cap. and im back in bussiness.

I followed the procedure online and found the thermostat was ok, it had continuity when cold, and the heater coil was also ok, it too had continuity, therefore the problem was a bad defrost timer. the refrigerator works great, thanks parts select!

Unplugged the frig. Removed temp control module from frig, 1 screw with nut driver. Activated defrost timer by rotating adjustment until 2 clicks are heard. Removed two timer mounting screws, unpluged timer, plugged in the new timer, mounted it to the control module with 2 mounting screws. Replaced control module with the 1 mounting screw. Closed door and plugged it up.

pulled down the thermostat cover and unpluged the timer control and replaced it with the new part. total time to repair was about 15 min. there was a vidio on how to replace the new part that just informed me that I did it right!!!!very easy site to find what you are looking for!!!!

Just followed the online instruction video .It was very easy.

You guys at Partselect are the best!!! Went to your site, typed in my appliance symptoms, and received possible fixes. Ordered the suggested parts (under $50) on a Sunday night and got em Tuesday am. Installed the easiest one first and Voila!!!! Frig is working great. Thanks Bob S

Remove 4 screws that hold up overhead controls, this is also the part that holds the light. Unplug the timer and replace. Super simple and runs great now. After you plug it in it may take a few minutes to kick on the compressor but it will. Also I was pleased it was a factory Frigidare part. Price was right.

Diagnosis: used wiring diagram attached to frig and determined cause could be wiring, heater element, thermostat or timer. After completely defrosting the frig (turned it off) I removed the rear cover in the freezer and looked for an obvious problem. None seen. Removed temperature select pod from the frig box and looked for obvious problems. None seen but defrost timer appeared poorly made. Repair: Since I had no practical way of checking the defrost cycle in operation, I checked probable failures on the Part Select website and saw defrost timer as most probable. I ordered the timer. Installed it. Waited a few days to make sure the frig went through a few defrost cycles then removed the freezer rear cover. There was no excessive frost buildup so I'm reasonably sure the repair was successful.

I first thought the defroster heater broke - took the back wall of the freezer off and cooling fins were fine. Then took the defroster timer out and opened it up. The contacts were badly burnt so the compressor and fan ran during only part of the cooling cycle. Replacing the timer took less than 5 minutes - turn off the power, remove one screw to take out the control box, cut the ground wire (new timer housing is plastic and does not have a ground connection), remove two screws to unmount the timer, unplug the old timer, plug in the new timer, fasten with two screws, put the control unit in and fasten with one screw, turn power back on.

real easy with the help of the video , made the difference

Looked up troubleshooting info on your web site. Decided to replace the defrost timer. Ordered it using Paypal. Received the Shipment in about 1.5 days in Rural NC. Watched Your Video, cut off power to the fridge, removed the top self and unbolted the panel, removed the defective defrost timer, installed the new one and re-installed the panel and top shelf. Set the timer to defrost to check the operation (looked inside the freezer to see that the defroster was glowing red - it was) waited about twenty minutes to ensure that the fridge started cooling again. Fixed!

Turned off Refrigerator by thermostat switch in Freezer Compartment,(allowing for light to work in freezer). Then removed all food from freezer side,then all shelves & basket drawer. Next, unplugged refrigerator from electrical source. Removed back of inside of the freezer. Located the Thermostat for defrosting cooling coil. Removed and replaced with new part.(Tip-unplugged the wires for the original thermostat, remove from freezer and cut off and splice with connectors provided with new part, it's easier because you're not trying to do this in the narrow space of the freezer). Then attach the thermostat with new bracket and plug thermostat wires back in, replace back panel, shelves, plug in power supply, turn thermostat switch in Freezer to normal setting. Wait for Freezer to cool and replace food. It's currently working like new. BTW I thought I need a defrost time as well...however after I ordered that part and received it, I turned the existing defroster timer manually with a straight ended screwdriver very slowly and it cycled and the defrost rods glowed/functioned just fine. Therefore I didn't replace defrost timer. I'll save the new timer for future repair if needed. All in all it was fairly easy, and I didn't have to buy another fridge. I was really pleased with the service of this website...and the parts arrived very quickly via Fedex. Thanks www.partselect.com ! KJ

I needed to determine if the heating coil was ok. I bypassed the thermostat, rotated the defrost timer manually with a flat screwdriver until it clicked. The coil heated up and turned a glowing red. So the coil was ok. After looking at the wiring diagram located on the back, the only parts in line was the timer and the thermostat. So I ordered both, replaced them, and everything is working fine. I went online about noon on Thursday, placed the order. The shipping indicated 2-3 business days. To my surprise, they were delivered to my home on Friday, mid morning. Great service from Part Select.

I original tried to repair the motor but was not able to. I remove the screws on the back plate and removed the the back plate. Removed the shroud for the motor and screws, unplug the power connection and removed the fan motor. Installed the new fan motor and reassembled everything. The refrigerator 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.