What was found
ENROUTE FA'S SAID PREMIUM CLASS PASSENGERS WERE VERY WARM AND WE TRIED TO COOL CABIN. NO CHANGE WE AN CABIN HOT QRH AND TUNED TRIM AIR SWITCH OFF. CABIN COOLED BETTER. OTHER PARTS OF CABIN WERE NORMAL. GROUNDED - YES. PERFORMED B737-900 FIM 21-61 TASK 801 #2 TEMP CONTROLLER BITE "VERIFY" TEST SHOWS ON 1 #2 TEMP CONTROLLER "THIS PACK TCV "FAULT". PERFORMED VERIFY TEST TWICE WITH SAME FAULT ON COMPLETION OF TEST. REMOVED & REPLACED TCV REF B737-900 AMM 21-61-21-400-801. OPS & LEAK CKS GOOD. ACCOMPLISHED BIT TEST REF AMM 21-61-00 NO FAULTS FOUND.