What was found
MFR - THERE WAS A SMOKE SMELL IN CABIN / COCKPIT, TURNED OFF PACK 2 SMOKE SUBSIDED. RT PACK WILL NOT HEAT A/C IN AUTO OR MAN MODE. DIVERTED TO MFR AND ACCOMPLISHED A UNEVENTFUL LANDING. CFR MET AIRCRAFT. CHECKED MDC AND FOUND NO AIR CONDITIONING RELATED FAULTS. REPLACED NR 2 AIR CYCLE MACHINE IAW CRJ-700 MM TASK NUMBERS 21-51-08-000-801-A01 AND 21-51-08-400-801-A01. AIR CONDITIONING TEMPERATURE CONTROL SYSTEM OPERATIONAL TEST GOOD IAW CRJ-700 MM TASK 21-60-00-710-801. NO UNUSUAL ODORS NOTED IN FLIGHT DECK OR CABIN DURING OPERATIONAL TEST. RETURNED TO SERVICE.