What was found
(CAN) DURING A ROUTINE FLIGHT, IT WAS NOTED THE PROPELLER HEAT WAS INTERMITTENT IN NORMAL MODE AND WAS UNSERVICEABLE IN STAND-BY MODE, THE FLIGHT CONTINUED WITHOUT COMPLICATIONS. MAINTENANCE FOUND A FAULTY PROPELLER HEAT CONTROL RELAY, IT WAS R & R, THE SYS GROUND FUNCTION CHECKED SERVICEABLE.