As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH PACKS CYCLE FROM 0 TO 110 DEGREES APPROX EVERY 30 MIN WITH PACK OPERATED INDIVIDUALLY AND BOTH SAME TIME, RESPONSE BEFORE PACK TEMP STABILIZED WERE BETWEEN 20 TO 30 MINS. REPLACED ZONE TEMP CONTROLLER. AFTER ZONE TEMP CONTROLLER CHG RAN BOTH PACKS, PACKS STABLIZED AT 61-63 DEGREES WITHIN 15 MINS AND STAYED THERE FOR 35 MINUTES WHILE IN THE AUTO MODE, AND TEMP SWITCHES AT 12 O'CLOCK.