Code Definition

B10AC — Blend Door Control Circuit Open

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B10AC

B10AC is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B10AC is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B10AC is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The blend door controls the mix of cold air from the evaporator and warm air from the heater core to achieve the cabin temperature requested by the driver or by automatic climate control. DTC B10AC is set by the HVAC Control Module when it detects an open circuit on the blend door actuator control line, meaning the module cannot see the actuator respond to commanded position changes or cannot supply drive voltage through the circuit. The fault is typically stored after a defined monitoring period with no feedback or current flow, and is most often caused by a broken wire, a disconnected plug, ...

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