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.
A/C Compressor Regulator Valve -N280
Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit SYSTEM OVERVIEW - REFRIGERANT CIRCUIT .
- The regulator valve is installed in the A/C compressor. It is activated for example by the A/C Control Module -J301-, the Front A/C Display Control Head -E87- or the Climatronic Control Module -J255- (depending on the vehicle, possibly via the data bus and an additional control module). Use the Vehicle Diagnostic Tester in the A/C system"Guided Fault Finding" function and refer to the Refrigerant Circuit (vehicle-specific Service Information).
- Pressure on the low pressure side is influenced by the regulator valve and thus regulates the temperature in the evaporator.
The A/C Compressor Regulator Valve -N280- is a component of the A/C compressor and cannot be replaced separately on all A/C compressors. Refer to the Parts Information.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.