Philip F New River , AZ August 02, 2015 Appliance: Magic Chef Freezer MCUF88W Magic Chef Freezer Mcuf88w: Older magic chef freezer quit freezing. How to replace Dufm320 Ptc. Checked several web sites for this freezer and came to conclusion to either buy a new freezer or replace a few parts that I could do easily for cheaper than repairman would charge just to look at the freezer. A few people had stated that either the thermostat, capacitor or ptc had been the problem with their freezer so I ordered all three for $80 total with shipping. It took me 15 minutes to replace these and now freezer is working like new. Appliance Parts Pro shipped quickly, received parts in 3 days. Will use them again and recommend to everyone. 15 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes