B3A15

A/C Refrigerant Distribution Valve B Actuator Control Circuit Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Insufficient interior cooling
Uneven distribution of cold air
Increased noise from the air conditioning system
Flashing AC light on instrument panel

Causes

Refrigerant distribution solenoid valve B malfunction
Open or short circuit in valve wiring harness
Poor contact in control circuit connectors
Malfunction of the air conditioning control unit
Low refrigerant level in the system

How to Fix

Check the refrigerant level in the system
Visually inspect the wiring harness and valve connectors for damage.
Check the resistance and operation of the valve with a multimeter
Scan the control unit for additional errors
If necessary, replace the valve or repair the wiring harness
Reset the air conditioning system after repair

Related codes

B3A14 B3A16 B3935