ASE A7
Heating & Air Conditioning (A7)
The ASE A7 Heating & Air Conditioning test covers HVAC and engine cooling diagnosis, refrigerant handling, refrigeration system components, and electrical, vacuum and automatic climate controls. It is taken by technicians who service climate control systems and counts toward ASE Master Automobile Technician status. Note that A7 does not by itself meet EPA Section 609 refrigerant requirements.
- Questions you sit
- 60
- Scored
- 50
- Time allowed
- 75 min
- GearheadPass questions
- 117
From ASE's 2026 study guide. The test includes 10 unscored research questions you can't tell apart from the scored ones.
Content areas and weights
| Content area | Questions on the test | Share | Free practice |
|---|---|---|---|
| HVAC & Engine Cooling Diagnosis/Service | 21 | 42% | 5 questions → |
| Refrigeration System Components | 10 | 20% | 5 questions → |
| Operating Systems & Related Controls | 19 | 38% | 5 questions → |
Study each area
A7 · 21 questions on the test
HVAC & Engine Cooling Diagnosis/Service
The largest A7 area: HVAC performance and pressure diagnosis, leak testing, refrigerant recovery, evacuation and charging, refrigerant handling, and engine cooling and heater service.
A7 · 10 questions on the test
Refrigeration System Components
Diagnosing and replacing A/C refrigeration components: compressors and clutches, protection devices, condensers, evaporators, expansion valves, orifice tubes and driers.
A7 · 19 questions on the test
Operating Systems & Related Controls
Diagnosing HVAC controls: blower and compressor clutch circuits, fan controls, electric and vacuum actuators, ducts and doors, and automatic temperature control systems.
Take a full-length A7 mock in the app
60 questions in 75 minutes, weighted like the real test, scored by content area, with English or Spanish on every question.
