ASE G1 · Maintenance & Light Repair
Heating & A/C
Basic HVAC service: verifying system operation, identifying refrigerant and recovering and recharging, checking for leaks, condenser airflow, cabin filters, belts and evaporator drains.
- Questions on the G1 test
- 4
- Share of the test
- 7%
- GearheadPass questions
- 27
- With exhibits
- 7
What this area covers
ASE's task list for Heating & A/C on the G1 Maintenance & Light Repair test groups into these tasks. Expect diagnosis-first questions: what's the most likely cause, what should be checked next, and which technician is right.
- HVAC operation and door checks
- Refrigerant ID, recovery and recharge
- Visual A/C leak checks
- Condenser airflow
- Cabin air filter replacement
- Drive belts and evaporator drains
How to study it
- This area carries 4 of the G1 test's questions (7%). Give it study time in proportion.
- Work the free questions first, then read every explanation, including the ones you got right; the reasoning is what transfers to new questions.
- 1 of the 5 free questions here are Technician A/B items. Judge each statement on its own before you pick A only, B only, Both or Neither.
- 3 free questions use an exhibit. Read the exhibit's numbers before the answer options.
- Always confirm specifications in the vehicle manufacturer's service information. Test questions assume you would.
Free practice quiz
5 Heating & A/C questions with explanations
All 27 Heating & A/C questions are in the app
Plus a full-length G1 mock, flash cards, and English or Spanish on every question.
More G1 content areas
G1 · 9 questions on the test
Engine Systems
Routine engine service and inspection: leaks and noises, oil changes, cooling system tests and parts, belts, air and throttle body service, exhaust, spark plugs, fuel and EVAP checks, and DEF.
G1 · 4 questions on the test
Automatic Transmission
Basic automatic transmission service: road test and DTC retrieval, fluid type and condition, leaks and seals, CV and drive shaft parts, cooler lines, mounts, and fluid and filter changes.
G1 · 6 questions on the test
Manual Drive Train & Axles
Basic driveline service: hydraulic clutch bleeding, shift linkage, seals and fluid, drive shafts and CV joints, wheel bearings, rear axles, and 4WD/AWD transfer case checks.
G1 · 13 questions on the test
Suspension & Steering
The largest G1 area: power steering service, linkage and suspension inspection, struts and shocks, basic alignment measurements and adjustment, tire service and repair, and TPMS.
G1 · 11 questions on the test
Brakes
Brake inspection and service: fluid and leak checks, warning lights, bleeding, drum and disc brake service, rotor and drum machining, parking brakes, and power assist checks.
G1 · 8 questions on the test
Electrical
Basic electrical service: voltage, current and resistance checks, battery testing and charging, jump-starting, starter and alternator replacement, lighting, gauges, horn and wipers.