B3A0B

A/C Refrigerant Expansion Valve Actuator Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Air conditioner doesn't work
Reduced cooling efficiency
Unstable operation of the air conditioning system

Causes

Expansion valve control circuit open
Expansion valve malfunction
Wiring harness damage
Problems with the air conditioning control unit

How to Fix

Check valve control circuit integrity
Inspect the wiring harness for damage
Check expansion valve resistance
Replace expansion valve if necessary
Check the operation of the air conditioning control unit

Related codes

B3A0A B3A0C B3A0D