A/C Unit Problem

A\C unit overheated and shut down after running for aproximately 30 min. After visual inspection from ground level maintenance was unable to pin-point trouble. A decision was made to use infrared thermography to determine the reason for overheating. After taking a thermal image of the A\C unit, it was determined that there was excessive heat build-up at the connection of the HI pressure line to the condenser. This in turn created excessive pressure in the compressor causing the overtemp switch to kick off. Visual inspection verified there was a crushed HI pressure tube at the condenser. Repair: Evacuated A\C system and replaced HI pressure line from Condenser to Compressor, recharged system with 6.50 LBS of Freon 22. Total Parts & Labor: $890

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