As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL, FWD CABIN ZONE TEMP LIGHT ILLUMINATED TEMP SHOWS 52 DEG C WAS UNABLE TO CONTROL THE TEMPERATURE OR GET LIGHT TO GO OUT WITH CHECKLIST. ACFT GROUNDED. PERFORMED BITE TEST OF BOTH CABIN/ ZONE TEMP CONTROLLERS NR 2 CONTROLLER SHOWED ZONE FAULT. RESET NR 2 CONTROLLER & PERFORMED 2 ADDITIONAL BITE TESTS, BOTH ARE GO. IAW FIM 21-62, TASK 801.