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 523 (REFRIGERANT SYSTEM [HVAC])REFRIGERANT CHARGE CHECK
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Refrigerant Charge Check
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Refrigerant Charge Check
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
- Install the manifold gauge set. (See MANIFOLD GAUGE SET INSTALLATION .)
- Check the refrigerant pressure reading with the engine stopped.
- Verify that the high- and low-pressure side readings of the manifold gauge are at 493-788 kPa {5.02-8.04 kgf/cm2, 72-114 psi}.
- If the pressure readings are lower than specified, recharge the refrigerant amount. (See REFRIGERANT CHARGING .)
- If the pressure readings are within the specification but there is insufficient cooling, go to the next step.
- If the pressure readings are within the specification and there are no leaks, the refrigerant amount is OK.
- Start the engine and run it at a constant 2,000 RPM.
- Turn the A/C switch on and set the fan switch at 4th.
- Set the REC/FRESH lever to REC.
- If the A/C compressor is short-cycling, note the low-pressure side reading at which the magnetic clutch kicks out.
- If the pressure is 167 kPa {1.7 kgf/cm2, 24 psi} or lower, evacuate then recharge the refrigerant system with the proper amount of refrigerant. (See REFRIGERANT CHARGING .)
- If the pressure is 206 kPa {2.1 kgf/cm2, 30 psi} or higher, inspect the thermoswitch. (See THERMOSWITCH INSPECTION .)
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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.