Workshop Manuals Factory service & repair Aston Martin
Aston Martin DB9 Factory Workshop Manual (Issue 2, 2005)13 · 12 Climate control
13 · Heating & A/C

A/C Unit

Make
Aston Martin
Model
DB9 Factory Workshop Manual
Year
Issue 2, 2005
Section
Air Conditioning (A/C) System › A/C Unit
12 Climate controlA/C Unit
Diagram of the expansion valve located on the A/C unit

The expansion valve is located on the outside of the A/C unit and comprises of a diaphragm, connected by a capillary tube to a temperature sensing bulb, which regulates the valve according to temperature variations at the evaporator outlet pipe. This component is not serviceable.

A/C Unit

Diagram of the A/C unit showing the expansion valve, power transistor, and evaporator temperature sensor
Diagram of the A/C unit showing air outlets, air inlet, A/C module, actuators, condensate drain, and coolant pipes

The A/C unit houses the evaporator, heater matrix and air flow flaps.

The unit also incorporates two servo motor operated air distribution flaps.

  1. Regulates airflow to the cabin vents.
  2. Regulates airflow to the defrost / demist air ducting.

When the cabin air flap is open, air is ducted to the cabin via face and foot level air vents.

Condensate (water) which forms on the evaporator fins is drained out of the unit case through a drain hose, located at underneath / rear of the evaporator.

Parts & tools for this job For 2005 Aston Martin DB9

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