Blend Door Actuator Circuit - Driver Side
2003-2003 Aston Martin DB7 3.2L I6 Supercharged
The 2003 Aston Martin DB7 is equipped with a 3.2L inline-6 engine. Below you'll find detailed b0622 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the driver side blend door (temperature mix) actuator. The blend door controls the mix of hot and cold air.
Symptoms
- Driver side blows only hot or only cold air
- Temperature does not change with control adjustment
- Clicking noise from behind dashboard
- Inconsistent temperature delivery
Common Causes
- Faulty blend door actuator motor
- Blend door binding or broken
- Actuator gear stripped
- Wiring issue
- HVAC control module fault
Diagnostic Steps
- Listen for actuator operation when changing temp
- Test actuator with direct power
- Check actuator gears for stripping
- Inspect blend door for binding
- Scan HVAC module for codes
Repair Notes
Replace blend door actuator. If door is broken, dash removal may be required for door replacement.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
- B0012Driver Side Airbag Deployment Circuit Short to Ground
- B0013Driver Side Airbag Deployment Circuit Short to Battery
B0622 on Other Vehicles
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2017-2017 4.0L V8 Twin Turbo
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2018-2018 4.0L V8 Twin Turbo
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2018-2018 5.2L V12 Twin Turbo
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2019-2019 4.0L V8 Twin Turbo
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2019-2019 5.2L V12 Twin Turbo
Common Questions
What does code B0622 mean on a 2003-2003 Aston Martin DB7?
B0622 stands for "Blend Door Actuator Circuit - Driver Side". Malfunction in the driver side blend door (temperature mix) actuator. The blend door controls the mix of hot and cold air.
What are the symptoms of B0622 on a Aston Martin DB7?
Common symptoms of B0622 include: Driver side blows only hot or only cold air, Temperature does not change with control adjustment, Clicking noise from behind dashboard, Inconsistent temperature delivery.
What causes B0622 on a 2003-2003 Aston Martin DB7?
Common causes of B0622 include: Faulty blend door actuator motor, Blend door binding or broken, Actuator gear stripped, Wiring issue, HVAC control module fault.
Last updated: March 2026