As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 636 21-60 1938091 29MAR19 PWM CLOSE PACK 2 AUTO TEMP CONTROL UNRESPONSIVE TO PILOT CONTR OLS. MANUAL DOES NOT PROPERLY CONTROL TEMP. MANUAL O NLY EFFECTIVE AT 9 OCLOCK OR LESS POSITION. FACT 30MAR19 11:19 PHL R&R DUAL TEMP CONTROL VALVE IAW AMM 21-60-01 OPS CHE CK GOOD CLEAR MEL 21-15-3