Cooper and Hunter F codes: a sensing family shared across the range

What Does Error F-series Mean?

Cooper and Hunter groups its sensing faults into an F-series, where the letter marks a temperature sensing problem and the digit identifies which sensor position the control was reading. Every entry in the family shares the same meaning at the level of the letter: a reading the control will not act on. Applies to: Cooper and Hunter ductless mini-split systems documented in the Cooper and Hunter support library Cooper and Hunter sells several ductless ranges and publishes documentation per range rather than as one list. The digit following the F identifies a sensor position within the model's own scheme, so the support document for your series is what maps it. Ranges from other suppliers using similar lettering are unrelated. Owner-safe checks: Photograph the display showing the complete code, letter and digit together, before power is interrupted. | Compare the temperature the indoor unit reports against a separate thermometer and note both figures. | Record which indoor unit is affected and whether any others on the system are behaving oddly. Qualified technician: Sensing elements, their connectors, and the harnesses linking them to the board sit inside casings that also carry mains supply, so access is qualified work. | An outdoor sensing fault can accompany water ingress into the enclosure, which needs assessing beyond the sensing element itself.