B3A01

A/C Refrigerant Distribution Valve Actuator C Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Reduced air conditioner efficiency
Uneven cooling of different areas of the cabin
Flashing climate control system indicator
Noise during operation of the air conditioning system

Causes

Broken wires in the valve control circuit
Oxidation of contacts in the valve connector
Refrigerant distribution solenoid valve malfunction
Problems with the climate control unit
Short circuit in wiring harness

How to Fix

Check the integrity of the wiring harness to the valve
Clean the contacts in the valve connector
Check the valve winding resistance (should be between 10-30 Ohms)
Check the control signal from the control unit
If necessary, replace the refrigerant distribution valve
Flash the climate control unit (if required)

Related codes

B3A00 B3A02 B3A03 U1000