How to Test if a Temperature Switch is Working?

Here’s the English translation of the instructions for testing a temperature switch:

How to Test if a Temperature Switch is Working?

To determine whether a temperature switch is functional, test its continuity (on/off state) in response to temperature changes. Follow these steps:

Prepare Tools?:

Set a multimeter to the ?buzzer or diode test mode?^1,3,7.

For ?Normally Closed (NC)? switches (common in appliances), the contacts should conduct electricity at room temperature.

For ?Normally Open (NO)? switches, contacts should be open (no continuity) at room temperature^2,4.

Room Temperature Test?:

Measure resistance across the switch’s terminals with the multimeter.

NC switch?: If no continuity (no buzzer sound), it is faulty^1,5,8.

NO switch?: If it shows continuity unexpectedly, it is faulty^1,5,8.

Heating Test?:

Heat the switch to its ?rated temperature? (e.g., 85°C, 180°C).

NC switch?: Should ?open? (multimeter stops buzzing)^1,3,4.

NO switch?: Should ?close? (buzzer sounds)^1,3,4.

Reset Check?:

After cooling down (or manually pressing a reset button if applicable), the switch should return to its original state^3,5,6.

Important Notes?:

Confirm the switch’s specifications before testing (e.g., 10A current, 85°C rating).

Replace with a switch matching the ?same parameters?^2,4,8.

Key Terms:

Normally Closed (NC)?: Conducts at room temperature, opens when heated.

Normally Open (NO)?: Opens at room temperature, closes when heated.

Rated Temperature?: The temperature at which the switch is designed to trigger.

Let me know if you need help performing the test! ??