Michael N Mesa , AZ December 06, 2016 Appliance: Frigidaire Freezer FFU21F5HWB Frigidaire Freezer Ffu21f5hwb: High temperature light and door ajar light were lit on the control panel of freezer and freezer was not working. How to replace Light Switch (Door-Activated). Diagnosed the door light switch was malfunctioning. Called local appliance parts shops and was told 3-4 weeks to get switch. Found aplianceparts online. The website indicated part in stock. Ordered part and it arrived at my door in just three working days. Factory part so install was a breeze. Freezer working great again. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes