As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TEMP SOURCE SELECTOR KNOB WHEN WIGGLED WILL SHOW TEMPS JUMPING FROM 20 TO 100C ON WHATEVER IS SELECTED. SOMETIMES IT STICKS AT 100C UNTIL TOUCHED AGAIN. ZONE TEMP SELECTORS APPEAR TO BE WORKING PROPERLY-NO CALLS CAUSES TEMP INDICATION TO SO CRAZY. GROUNDED - YES. REMOVED & REPLACED TEMP CONTROL MODULE OP CHECK GOOD IAW AMM 21-61-00. NO TEMP FLUCTUATION NOTED. NO FURTHER ACTION REQUIRED.