As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ON RECALL. GROUNDED - YES. PERFORMED B737-900 FIM 21-62 TASK 801 PACK TEMP CTL BITE TEST. NO FAULTS FOUND. GREEN "GO" LIGHT CAME ON AFTER PUSHING "VERIFY" SWITCH. CONT CAB "ZONE TEMP" LIGHT WENT OFF AND STAYED OFF AFTER RUNNING PACKS.