Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 273 (REFRIGERANT SYSTEM [HVAC])REFRIGERANT SYSTEM PERFORMANCE TEST
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Refrigerant System Performance Test
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Refrigerant System Performance Test
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Perform refrigerant pressure check. (See
REFRIGERANT PRESSURE CHECK
.)
- If not as specified, troubleshoot refrigerant system. (See TROUBLESHOOTING INDEX .)
- If they are correct, go to next step.
- Place a dry-bulb thermometer in the driver-side center ventilator outlet.
- Open the hood.
- Warm up the engine and run it at a constant 1,500 rpm.
- Set the fan switch to 4th speed.
- Turn the A/C switch on.
- Set the RECIRCULATE mode.
- Set the temperature control to MAX COLD.
- Set the VENT mode.
- Close all the doors and all the windows.
- Wait until the center ventilator temperature stabilizes. The output temperature is stable when the A/C compressor is repeatedly turned on and off based on the A/C compressor control of evaporator temperature sensor.
- Measure the center ventilator temperature.
- Measure the ambient temperature.
- Verify that the intersection of the center ventilator temperature and the ambient temperature is in the shaded zone.
- If not as specified, troubleshoot the refrigerant system. (See TROUBLESHOOTING INDEX .)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.