As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMPARTMENT TEMP INDICATED 12 DEG C IN THE FWD CABIN AND 18 DEG C IN THE AFT CABIN WITH TEMP SELECTED TO FULL WARM. FLT DECK WAS DIFFICULT TO WARM UP. PERFORMED OPERATIONS TEST OF ZONE TEMP CONTROL SYSTEM, TEST NORMAL IAW AMM 21-61-00.