Mode Door Actuator Circuit
2007-2012 Nissan Altima 2.5L I4
Description
Malfunction in the HVAC mode door actuator. The mode door directs airflow to floor, dash, or defrost outlets.
Symptoms
- Air only comes from one set of vents
- Cannot switch between floor/dash/defrost
- Defrost mode not available
- Clicking behind dashboard when changing modes
Common Causes
- Faulty mode door actuator
- Mode door binding
- Stripped actuator gears
- HVAC control module fault
- Wiring damage
Diagnostic Steps
- Listen for actuator when changing mode
- Test actuator with direct power
- Check for mechanical binding
- Inspect actuator gears
- Scan HVAC module
Repair Notes
Replace mode door actuator. Ensure mode door moves freely before installing new actuator.
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
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
B0624 on Other Vehicles
Nissan 200SX
1995-1998 1.6L I4 GA16DE
Nissan 200SX SE-R
1995-1998 2.0L I4 SR20DE
Nissan 240SX
1995-1998 2.4L I4 KA24DE
Nissan 300ZX
1990-1996 3.0L V6 VG30DE
Nissan 300ZX Twin Turbo
1990-1996 3.0L Twin-Turbo V6 VG30DETT
Nissan 350Z
2003-2006 3.5L V6 VQ35DE
Nissan 350Z
2007-2009 3.5L V6 VQ35HR
Nissan 370Z
2009-2020 3.7L V6 VQ37VHR
Common Questions
What does code B0624 mean on a 2007-2012 Nissan Altima?
B0624 stands for "Mode Door Actuator Circuit". Malfunction in the HVAC mode door actuator. The mode door directs airflow to floor, dash, or defrost outlets.
What are the symptoms of B0624 on a Nissan Altima?
Common symptoms of B0624 include: Air only comes from one set of vents, Cannot switch between floor/dash/defrost, Defrost mode not available, Clicking behind dashboard when changing modes.
What causes B0624 on a 2007-2012 Nissan Altima?
Common causes of B0624 include: Faulty mode door actuator, Mode door binding, Stripped actuator gears, HVAC control module fault, Wiring damage.