As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROPELLER DE-ICE CAUTION LIGHT ILLUMINATES WHEN NR 1 PROPELLER IS HEATING. DIVERTED, LANDING UNEVENTFUL. CDS FAULT IS OPEN HEATER PHASE A NR 1 TMCU. R & R NR 1 BLADE DE-ICE HARNESS ON NR 1, PROP REF AMM 61-10-06-000-805, 61-10-06-400-805. OPS CHECK GOOD. RETURNED TO SERVICE.