David H Austin , TX February 26, 2019 Appliance: Frigidaire Refrigerator EI23BC30KS3 Frigidaire Refrigerator Ei23bc30ks3 / : Defrost heater/thermostat issue. How to replace Defrost Heater. I had a swollen thermostat an went ahead replaced heater along with it while I was there. The plugs for both made it a snap. Easy DIY saving $300 on labor and have a super clean appliance again. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes