How to Troubleshoot & Replace Frigidaire AP2150145 / 5303918214 Defrost Thermostat Kit

Changed the thermostat and now all is well. Quick and easy. 

I called a few repair places they all wanted 100.00 or better just to show up. So I looked on line and found the appliance pros they listed a part called a defrost thermostat well that's what my fridge wasn't doing the part was only 11.00 a new fridge like mine was 1100.00 so I took a chance and ordered the part. It took about 10 minutes to put it in when it arrived the next day its been working fine ever since thanks,appliance pros 

I ordered a new defrost thermostat from appliance parts pros, although I wasn't positive that my heating element was good. (I was having trouble getting it to register continuity or impedance). I decided to gamble on the thermostat as I could not get the circuit to close even after dunking it in ice water. The part arrived in about 2 days and the install was relatively quick. As I was putting on the thermostat, I did notice that the aluminum band that hold the heating element had let go also, so I replaced them with stainless steel zip ties to keep the element in contact witht the accumulator coils. Short story long the thermostat worked like a charm and fridge and freezer have worked flawlessly since 

I noticed both freezer and fridge too warm. Per defrost thermostat repair video, I pulled the back panel off the inside of the freezer section and saw the ice completing covering the cooling coils. This prevented cool air from flowing thru the coils to keep things cool. I noticed the fan in the freezer section was working. I melted the ice covering the coils and now everything worked, so I knew I had a defrosting issue. I "hoped" the thermostat was the issue since others had seen the same thing on this Frigidaire model. There are ways to test the thermostat but since the part was inexpensive I took the gamble and ordered it. I replaced the defrost thermostat and now the freezer section defrosts and both freezer and fridge work great. 

I watched the video and I did the repairs myself. 

I measured the continuity of the defrost heater element and the thermostat and they were both good. This only left the main control board. I ordered all three because it was only a matter of time before either the heating element or thermostat went bad. I only changed out the control board and now have the other parts on hand for an immediate fix in the future. Appliance pros were awesome. I paid just a little more for the faster shipping and got the parts the next day even though I expected 2 day minimum. The website is great. Plug in your model number and it will tell you part compatibility and search out for all compatible parts. Awesome feature. Put a couple of 2x4s under the refrigerator to elevate it and make it easier to get the control board out. I used a crowbar to lift the refrigerator to place the 2x4s. Defrost problem fixed ! 

I watched the video provided and replaced the part as shown in the video. The job was pretty easy after watching the video. 

Defrost control thermostat. 

I replaced the Defrost thermostat in freezer and the thermistor in refrigerator 

Used troubleshooting guide on your website. Found the evaporator encased in ice. Thawed the ice and found defrost heating element had no reading on ohmmeter. Replaced element using Simon’s video. Great guy that Simon. He deserves a raise. Fridge now works like new.