Universal Refrigerator Defrost Thermostat, AP3674272, L45-20F, ML45

❄️ Refrigerator Defrost Thermostat | Universal | Replaces ML45

Brand new Universal Refrigerator Defrost Thermostat replacing ML45‑style thermostats. This L45‑20F thermostat opens at 45°F and closes at 20–25°F, regulating defrost cycles to prevent frost buildup on the evaporator coil.

Rated 10A at 120V and 5A at 240V with 12-inch leads for flexible installation. Ideal replacement for worn, stuck, or failed defrost thermostats causing cooling issues or excessive frost.

Specifications

• Temperature Rating: L45‑20F (opens at 45°F, closes at 20–25°F)
• Electrical Rating: 10A @ 120V, 5A @ 240V
• Lead Length: 12 inches
• Universal ML45‑style replacement

Replaces Part Numbers

WR50X45 PS303514 AP5642246 32745 ERML45 ML45 SL45 AP2071240 304873 AH303514 EA303514 PS303514 SWR50X105 SWR50X45 WR50X0006 WR50X0016 WR50X0025 WR50X0045 WR50X0109 WR50X109 WR50X16 WR50X25 WR50X5003 WR50X5007 WR50X5014 WR50X5016 WR50X5018 WR50X5020 WR50X5023 WR50X5024 WR50X5029 WR50X5030 WR50X5031 WR50X6

Compatible Models

ZISB48DYB ZISW42DYB ZISB42DYB ZISS48NCASS ZISB48DCA BIS42CKC ZISW42DYA ZISB42DYA ZISW48DYB ZISB42DCA ZISB42DSC BISW42ELE ZISB48DYA ZISS48DAASS ZISW42DSB ZISS42DAASS ZISW42DCA ZISW48DCA ZIS42NYB ZIS48NYB ZISB36DYB ZISS48DCASS BISB42ELD BISW42EKC ZISS42DCASS ZISW42EMC TBF18EAB ZISB42EMB ZIS42NSB ZIS48NCA ZISB42EMC ZISW42DSC BIS42CKB ZIS42NCA ZISB36DCA ZISB42DSE ZISW48DSB ZIS36NCA ZIS42CMC ZIS48NSE ZISB48DCB ZISS36DCASS ZISS42NAASS ZISW42DSE ZISW42DWA ZISW42DXA ZISW48DYA BIS42AJB BISW42ELB BISW42ELD CTF16CAB CTF16CAD ZIS36NRB ZIS42CMB ZIS42NWA ZIS42NXA ZIS42NYA ZISB42DSB ZISS42DYASS ZISS42NCASS ZISW36DTB ZISW36DYB ZISW42EMB 363.868441 363.868448 BCS42ELB BCS42ELC BCS42ELD BCS42UJB BIS42AJC BIS42AJD BISB42EKB BISB42EKC BISB42ELB BISB42ELC BISB42ELE BISW42EKB BISW42ELC CTF14APB CTF15CMC CTF15CPB CTF15CPC CTF15DMB CTF15DMC CTF15DRN CTF15EPC CTF16CAC CTF16CRB CTF16CRC CTF16CRN CTF16CRP CTF16CRS CTF16CTB CTF16CTC CTF16CVB CTF16CVC CTF16CVD CTF16CVF CTF16CVH CTF16CVJ CTF16CVK CTF16CVL CTF16CVM CTF16CWB CTF16CWC CTF16CWD CTF16CYB CTF16CYC CTF16EAB CTF16ERB CTF16ERN CTF16ERP CTF16ERR CTF16ETB CTF16EVB CTF16EVC CTF16EVD CTF16EVF CTF16EWC CTF16EYB CTF16EYC CTF16FRP CTF18AAB CTF18AVB CTF18AVC CTF18AWB CTF18AWC CTF18AWD CTF18AYC CTF18CAB CTF18CBC CTF18CBY CTF18CMP CTF18CPB CTF18CPF CTF18CRC CTF18CRN CTF18CRP CTF18CRR CTF18CRS CTF18CTB CTF18CTC CTF18CVB CTF18CVC CTF18CWB CTF18CYB CTF18EAB CTF18ERC CTF18ERN CTF18ERR CTF18ERS CTF18ETB CTF18ETC CTF18EVB CTF18EVC CTF18EVD CTF18EVF CTF18EWB CTF18EWC CTF18GAB CTF18GYB CTF18GYC CTF18HVC CTF18HWB CTF18HYB CTF21CRD CTF21CRN CTF21CRP CTF21CRR CTF21ERD CTF21ERN CTF21ERP CTF21ERR CTF21ETB CTF21GTB CTF21GTC ZIS36NCB ZIS36NRC ZIS36NTB ZIS36NTC ZIS36NTE ZIS36NWA ZIS36NXA ZIS36NYA ZIS36NYB ZIS42NCB ZIS42NSC ZIS42NSE ZIS48NCB ZIS48NSB ZIS48NSC ZIS48NWA ZIS48NXA ZIS48NYA ZISB36DCB ZISB36DRB ZISB36DSB ZISB36DSC ZISB36DTB ZISB36DTC ZISB36DTE ZISB36DWA ZISB36DXA ZISB36DYA ZISB42DCB ZISB42DWA ZISB42DXA ZISB48DRB ZISB48DSB ZISB48DSC ZISB48DSE ZISB48DWA ZISB48DXA ZISS36DCBSS ZISS36NCASS ZISS36NCBSS ZISS42DCBSS ZISS42NCBSS ZISS48DCBSS ZISS48DYASS ZISS48NAASS ZISS48NCBSS ZISW36DCA ZISW36DCB ZISW36DRB ZISW36DSB ZISW36DSC ZISW36DTC ZISW36DTE ZISW36DWA ZISW36DXA ZISW36DYA ZISW42DCB ZISW48DCB ZISW48DRB ZISW48DSC ZISW48DSE ZISW48DWA ZISW48DXA

️ What This Defrost Thermostat Does

• Monitors evaporator coil temperature
• Opens and closes to regulate defrost cycles
• Prevents frost buildup and airflow blockages
• Restores proper cooling performance

⚠️ Common Symptoms This Part Fixes

• Excessive frost on evaporator coil
• Refrigerator too warm or not cooling
• Freezer cold but fridge warm
• Unit runs constantly or short cycles

Installation Notes

• Disconnect power before servicing
• Located on evaporator coil or tubing
• Cut and splice using proper connectors or heat‑shrink
• Ensure thermostat is firmly clipped to evaporator tubing
• Allow several hours for system to stabilize after replacement

Restore proper defrost operation and cooling performance with this universal ML45‑style defrost thermostat.