Right Blend Door Actuator Performance (ATC)

What B10AF means

On a dual-zone (ATC) 300C, Charger or Magnum, the A/C-Heater control moves each side's blend-air door with a 12-volt actuator and watches the door-driver circuits during movement. B10AF is an 'actuator performance' code: it sets when the control detects a pulse-count error while trying to drive the RIGHT actuator — in other words the door isn't moving the way it was told to. It flags that something interfered with movement, but by itself it doesn't say exactly what, so further testing is needed. In practice the right side of the cabin behaves erratically or sticks at one temperature. 'Right' is the physical right of the vehicle (the driver's side on a right-hand-drive car).

Symptoms

• The right side of the cabin is erratic or stuck at one temperature
• That side sometimes responds, sometimes doesn't, as the door binds
• Possible clicking or straining from the right blend-door actuator
• B10AF stored in the A/C-Heater module, often with B10AE

Common causes

• Right blend-door actuator binding internally or physically broken
• Door linkage binding, disconnected, missing, or broken so the door can't follow the actuator
• Door-driver circuit shorted high, low, wire-to-wire, or open
• Faulty A/C-Heater control (module)

Severity & driving advice

Severity: Low — Comfort fault only — safe to drive; needs a scan tool that reaches the A/C-Heater module to diagnose.

Can I drive? Safe to drive; climate-comfort fault only.

Diagnostic approach

1. Read the HVAC codes — With a scan tool on the A/C-Heater module, note all blend-door codes and repair any Control Circuit / Performance or Control Circuit Open codes on the right door first.
2. Run the Actuator Calibration Test — Command a calibration and watch which fault reports. A door that binds or a linkage that slips will show up during the sweep.
3. Check the actuator and linkage — Verify the right door moves freely by hand about 190 degrees, and that the linkage is intact and not binding. Repair or free any mechanical problem.
4. Replace the actuator, then the control if needed — If the circuit and linkage are good but the door won't drive correctly, replace the right blend-door actuator and calibrate. If B10AF persists, suspect the A/C-Heater control module.

Estimated repair costs

Typical US repair costs (parts & labour) for the faults behind B10AF. These are national-average estimates, not a quote— your actual price varies by region, shop labour rate, and your vehicle’s make, model and year. Figures reviewed 2026.

Make & model notes

Chrysler / Dodge / Jeep: B10AF is the dual-zone (ATC) RIGHT blend-door 'actuator performance' code on LX-platform cars (300 / 300C, Charger, Magnum) and related FCA models. It is set during normal door movement (not just calibration) when the control sees a pulse-count error, so it frequently appears alongside B10AE. Confirm the door swings freely and the linkage is intact before condemning the actuator; the actuator itself is a three-screw, one-connector bolt-on behind the lower-dash trim. Calibrate after any actuator or control-head replacement.

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