The freezer defrosts sensor-also known as the defrost bi-metal or defrost termination thermostat-is next to the evaporator. It trips when the evaporator temperature gets too high, to protect the evaporator from overheating. When it trips, the defrost bi-metal shuts off the defrost heater. A defective defrost bi-metal prevents the defrost heater from working, causing frost to build upon the evaporator, causing a warmer freezer interior. Replace the defrost sensor if it prevents the defrost heater from working.
ltem NO | ELTH-008 16254 |
Use | Defrost/Temperature control/Protection |
Appliance | Refrigerators, Freezer |
Reset type | Automatic |
Basic material | Bakelite, Epoxy Resin, PA |
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 current, which is nearly sine wave, for one minute as bearing test. Resulted no breakdown, no flashover. |
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 | F12.7mm(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 |
What happens when defrost thermostat fails?
If the thermostat is defective it may not be able to sense the temperature of coils and then won't turn on the defrost heater. If the defrost heater doesn't turn on, the refrigerator will never start the defrost cycle and will eventually stop cooling.
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