Code Definition

C1780 — Temperature Select Failure

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

About C1780

C1780 is a manufacturer-specific chassis diagnostic trouble code recorded for Ford vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1780 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

DTC C1780 indicates a failure of the temperature select circuit in the climate control system. The temperature selector tells the control module what cabin temperature or blend setting the driver has requested, and the module uses this input to position the temperature blend door and, on hybrid Ford applications, to decide when the engine must run to supply cabin heat. The code sets when the selector input reads open, shorted, or implausible for the current control head position. When this code is set, the system may default the blend door to a fixed position, deliver air that does not match t...

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