Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2005 >> A4 Sedan (8E2) L4-1.8L Turbo (AMB) >> Repair and Diagnosis >> Heating and Air Conditioning >> Compressor HVAC >> Compressor Control Valve Assembly >> Description and Operation
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Compressor Control Valve Assembly: Description and Operation



Refrigerant Circuit Switches And Sensors And Related Connections

NOTE: Refer to vehicle-specific refrigerant circuit for switching pressures, switch removal/installation and switch layout/design Heating, air conditioning or Air conditioning.

A/C Compressor Regulator Valve N280







The regulator valve is installed in the compressor. It is actuated by the A/C Control Head E87 or the Climatronic Control Module J255. The pressure on the low pressure side is influenced by way of the regulator valve, thus regulating the temperature in the evaporator.

NOTE: The A/C Compressor Regulator Valve N280 is part of the compressor and cannot be replaced separately.
pro multis · About Operation CHARM