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B2375

Read the instructions below then start the fault diagnostic procedure.

Symptom: Perceived temperature in cabin too high or too low compared to the set temperature.

B2375


Heat Exchanger Solenoid. Short to B+

Heat Exchanger Solenoid. Open Circuit / Short to Ground


Fault symptoms

Perceived temperature in cabin too high or too low compared to the set temperature.

Conditions

The following conditions apply:


A short to B+ is indicated when the output for the heat exchanger solenoid is activated and the voltage on pin 24 exceeds 6 V.

A short to ground is indicated when the output for the circulation pump is not activated and the voltage on pin 24 exceeds 6 V.

Measured every 440 ms and 5 consecutive measurements are required to set a diagnostic trouble code.

The diagnostic trouble code is cleared after the ignition has been turned on 20 times and the malfunction conditions have not been fulfilled.

When the diagnostic trouble code has been set the output is switched off.