What was found
THE FLIGHT CREW REPORTED THAT THE ACM OVERHEAT ANNUNCIATOR ILLUMINATED ON DESCENDING THROUGH 14,000 FT. THE FLIGHT CREW RUN THE QRH ABNORMAL CHECKLIST. THE WARNING WENT OUT A 6,000 FT. THE LANDING WAS NORMAL. THE MAINTENANCE VENDOR VERIFIED FOR PNEUMATIC LEAKS, NONE NOTED. ACCOMPLISHED ECS TEMP CONTROL DIAGNOSTIC SELF TEST, NO FAULT CODES. COMPLIED WITH TROUBLESHOOTING AND NOTED THE 35 DEGREE SWITCH OUT OF LIMITS. INSTALLED A NEW 35 DEGREE SWITCH. OPS CHECKS SATISFACTORY, NO LEAKS, NO FAULTS. AIRCRAFT RETURNED TO SERVICE.