As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN TEMPERATURE GAUGE INDICATES ZERO (0) WITH APU RUNNING AND HOT AIR SELECTED. GROUNDED - YES. (RESOLVED ON W/O: 1968630 TASKCARD: N/R-00004 ) OPERATED AIR CONDITIONING AND VERIFIED CORRECT INDICATION WHEN SET TO COLD,AUTO, AND WARM REF AMM 21-61-32. NO FAULTS OR DEFECTS NOTED NO HISTORY. THIS CLEARS MEL 21-61-03B PLACARDS REMOVED SEAMC DARWIN NOTIFIED.