What was found
MIDWAY THRU FLIGHT, THE F/A COMPLAINED OF EXCESSIVE CABIN HEAT, HAD TO POSITION THE FWD & AFT CABIN TEMP CONTROLS TO THE FULL COLD STOP, ANYTHING ABOVE THAT WOULD CAUSE EXCESSIVE HEAT. OPS WORKING NORMAL. ACFT GROUNDED. PERFORMED A CABIN TEMP CONTROLLER BITE TEST IAW FIM 21-61, TASK 801. TEST PASSED, NO FAULT AT THIS TIME. PERFORMED AN OPS TEST OF CONTROL AND INDICATION IAW AMM 21-61-00. OPS CHECKED NORMAL. NO HISTORY FOR 30 DAYS. OVERHEAT INDICATION FOR ZONE TEMP, DID NOT ILLUMINATE.