As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CABIN ZONE TEMP ON RECALL. LT GOES OUT ON MASTER CAUTION RESET. GROUNDED - YES. ACCOMPLISHED B737-800 AMM 21-61-00. PACK/ZONE TEMPERATURE CONTROLLER BITE TEST. GROUND VERIFICATION TEST PASSED. LIGHT NO LONGER DISPLAY BEFORE AND AFTER RECALL IS PRESSED. OPS CHECK GOOD. CLEARS MEL 21-21G.