Heater and air conditioner systems

Evaporator temperature sensor inspection

~1min read

1. Turn the AUTO switch on.

2. Set the temperature control at MAX COLD (Turn the left).

3. Turn the A/C switch.

4. Set the RECIRCULATE mode.

5. Close all doors and windows.

6. Wait for 5 minutes.

7. Remove the glove compartment.


8. Disconnect the evaporator temperature sensor.

9. Measure the temperature at the blower inlet.

10.Measure the resistance between terminals of the evaporator temperature sensor.

  • If the resistance is not as shown in the graph, replace the evaporator temperature sensor.

Test yourself

A quick Mazda 6 quiz: every answer comes with an explanation and a link to the manual page.