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.
Air conditioning system
AC installation in the car
The air conditioning used in this car is a conventional installation where a thermostat-controlled expansion valve (TEV/TXV) works as control valve.
The expansion valve controls the amount of refrigerant that passes the evaporator. The quantity depends on the temperature in the evaporator's outlet pipe. If the temperature is too low the amount is reduced slightly by closing the valve. When the temperature increases, the valve opens slightly again to let in more fluid in the evaporator. In this way, a balanced state is achieved.
The filler nipple is located against the engine compartment wall in the high-pressure line.
The AC-system is filled with environment-friendly R134a refrigerant, just like all other Volvo cars.
The system has two filler nipples. One in the high-pressure circuit for the evaporator, and one in the low-pressure after the evaporator.
Use the Manual With the Right Hardware
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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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