ASE A7 case studies
ASE A7 · Put your knowledge to work in context.
The ASE A7 - Automobile Heating and Air Conditioning credential is one of the automobile tests in the ASE certification series administered by the National Institute for Automotive Service Excellence. It is intended for working service technicians and for students preparing to enter the trade who want documented, third-party evidence of competence in vehicle climate control - the same area an employer relies on when a customer complains of weak cooling, a blower that only works on high, a heater that never warms up, or a cabin that fogs and never clears. The ASE A7 case studies are 5 cases and about 3,986 words.
1Dual-Zone System: One Cold Vent, One Warm Vent, Good Pressures
2019 four-door with dual-zone automatic climate control, 41,000 miles. Both zones set to 60°F (full cold), ambient 88°F, recirculation on, blower on high, engine at 1,500 rpm, doors open, compressor engaged.
686 words, about 3 min2R-134a System Cooled Poorly After a Condenser Replacement
2014 sedan, R-134a, 132,000 miles. The condenser was replaced after a collision repair.
833 words, about 4 min3Overheating at Idle and Lost A/C Performance After Collision Repair
2013 pickup, 138,000 miles, V8. Complaint: the temperature gauge climbs to 232°F in stop-and-go traffic with the A/C on, and A/C vent temperature rises from 44°F at 45 mph to 62°F after 10 minutes of idling.
875 words, about 4 min4Automatic Climate Control Drifts Warm After a Radio Installation
2018 sedan with automatic climate control, 61,000 miles. Complaint: on a 2-hour highway drive at 95°F ambient, the cabin drifts about 8°F warmer than the 72°F setpoint, yet the outlets stay cold.
813 words, about 4 min5A Topped-Off R-1234yf System That Tests as a Blend
2020 crossover, R-1234yf, 34,000 miles. A previous shop's invoice reads A/C topped off, added 12 oz R-134a.
779 words, about 4 min