As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PROPELLER HEAT CONTINUES TO FAIL IN FLIGHT. EN ROUTE LAX DIVERTED TO PSP. INSPECTED LEFT AND RIGHT PROPELLER DEICE LEADS, LOOKED OK. CHECKED RIGHT PROPELLER HEAT RCCB. INSPECTED WIRING AT SWITCH AND RELAYS. FOUND POWER AT A2 OF RCCB 226 DROPS TO BELOW 1 VOLT. WHEN PROPELLER DEICE ACTIVATED POWER AT A1 REMAINS 28 VOLTS. REMOVED AND REPLACED RCCB 226. OPS CHECK GOOD OF RIGHT PROPELLER DEICE SYSTEM.