Defrost Thermostat Manufacturer,Supplier and Exporter in India
Product Code : EL-RACLE-12853
Jlab Export is a leading Defrost Thermostat Manufacturer,and suppliers in India
A defrost thermostat ends each defrost once the evaporator has warmed up. It is fixed to the evaporator tubing and wired in series with the defrost heater. While the coil is cold it stays closed, and once the coil has warmed past its set point it opens. This one is fused and enclosed in watertight plastic.
Specifications
| Protection | Fused |
| Housing | Enclosed in watertight plastic |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Lab Exercises on Defrost Control
The standard bench test needs only a Digital Multimeter. At room temperature the thermostat should read open. Students then chill it in a freezer, measure again and find it closed, which is the state it must be in for the heater to run.
On a bench board, the thermostat completes the defrost circuit in series with the Defrost Heater Glass Tube, switched by the Adjustable Defrost Timer. Students compare its job with that of Thermostats 3, which controls the freezing compartment temperature by switching the compressor. One ends a defrost, and the other runs the cooling.
Frequently Asked Questions
What does the fuse in this thermostat do?
It is a backup in the heater circuit. If the thermostat contacts stick closed and the heater keeps running, the fuse opens and stops it. A blown fuse cannot be reset, so the whole thermostat is replaced.
Where on the evaporator should it be fitted?
Fit it where the old part was, usually on a tube near the top or outlet of the evaporator, where frost clears last. Fix it firmly so its face touches the tube, with no gap for air.
Why is it enclosed in watertight plastic?
It sits on the evaporator, where melt water runs off during every defrost and then freezes again. The watertight case keeps that water away from the contacts and leads, which would otherwise corrode or short.
The thermostat reads open when cold. What does that mean?
It has failed open, or its fuse has blown. The heater can then never come on, so frost builds up until air no longer passes through the evaporator and the fresh-food section warms. Replace the thermostat.
Other Refrigerator Thermostats and Fans
- Thermostats 1 (refrigeration compartment)
- Thermostats 2 (beverage bottle storage)
- Evaporator Fan
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Last updated: 5 November 2026
