B3A19

A/C Refrigerant Distribution Valve D Actuator Control Circuit Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Uneven interior cooling
Increased noise from the air conditioner
Air conditioning system failure

Causes

Open or short circuit in wiring harness
Solenoid valve malfunction
Problems with the air conditioning control unit
Mechanical valve jamming

How to Fix

Check wiring harness for damage
Check the resistance of the solenoid valve
Check valve operation using diagnostic equipment
Replace faulty valve or wiring harness

Related codes

B3A18 B3A20 B3A21