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.
Service valves
- The service valve for draining, vacuum pumping and filling with refrigerant
- Service valve for draining and vacuum pumping.
The service valves are used to:
- check the system through manometer connections
- drain the system of refrigerant
- vacuum pumping
- filling with refrigerant, high-pressure side only (1).
Filling with refrigerant must only be carried out on the high-pressure side to prevent the risk of liquid refrigerant in the compressor.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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