
The function of the defrost bi-metal thermostat is to clip onto the evaporator and protect your evaporator from overheating during the defrost cycle. If your refrigerator does not defrost properly you can test both the thermostat and the heater to figure out which part is at fault. For this repair, you will need a Phillips screwdriver, a 1/4 inch nut driver, a flat blade screwdriver, a pair of wire strippers, a roll of electrical tape, and a few butt splice connectors.


ltem NO | PL004 16124 |
Use | Defrost/Temperature control/Protection |
Appliance | Refrigerators, Freezer |
Reset type | Automatic |
Basic material | Bakelite |
Electric rating | 250V 10A |
Action temperature range | -30°C~90°C |
Differential | According to the requirement |
Insulation resistance | ≥100MΩ |
Tolerance | Refer to the regulation |
Life cycle | 100,000 times |
Contact material | Silver |
Dielectric Strength | Parts between electriferous components and non-electriferous ones can bear 2000V (3750V for Reinforced insulation type) 50Hz AC |
Insulation Resistance | With a DC 500V megger, borne DC 500V, the tested value is over 10MW. |
Resistance Between Terminals | Below 50mW |
Temperature characteristics | Normal close, Normal open |
Maximum Ambient Temperature | 90°C |
Diameter of Bimetal Disc | F12.8mm(1/2″) |
Wire Leads | Color: Red Length: customized |
Terminal type | Customized (Refer to our specification) |
Cover/Bracket | Customized (Refer to our specification) |
Sample Price | Free sample USD 50 freight charge, refund after mass order |




How does a bimetal defrost thermostat work?
A defrost bimetal thermostat works separately from the refrigerator or freezer. The defrost bimetal thermostat does this by activating a hot gas valve or an electrical heating element that raises the temperature near the evaporator, which then melts the frost that has formed.

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