As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ON MASTER RECALL EXTINGUISHES WHEN MASTER CAUTION SYSTEM RESET. GROUNDED - YES. ACCOMPLISHED BITE CK ON BOTH #1 + #2 ZONE TEMP CONTROLERS. FOUND RAM AIR ACT RED LIGHT, #1 CONTROLLER, ACCOMPLISHED BITE CK ON BOTH PACKS ZONE TEMP CONTROLLERS, WITH BOTH CONTROLLERS PASSING, NO HISTORY PER B737-800 AMM 21-51-00.