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! 🔧