I CAME UP ON A AMMANA THUOUGH THE WALL HEAT AND COOL UNIT AND IT IS MAKING A CLICKING SOUND ON HEAT CYCLE.....THE CODE FLASHES BLOWN FUSE BUT IT WAS GOOD ......THE RELAYS AND EYERYTHING RUN THROUGH THE BOARD ......IM GUESSING BAD BOARD???????ANY OTHER POSSIBLE SOLUTIONS.....I HAVENT WORKED ON TOO MANNY OF THESE UNITS.....SOUNDS LIKE RELAY NOT HOLDING THANKS