Peugeot 405 Manual

Air conditioning refrigerant check (18000 Mile (30 000 km) / 18 Month Service)
Routine maintenance and servicing / Air conditioning refrigerant check (18000 Mile (30 000 km) / 18 Month Service)


Note: On models from 1994, the maker’s specified interval for this procedure is 18 000 miles (30 000 km).

Warning: Do not attempt to open the refrigerant circuit.

Refer to the precautions given in Chapter 3.

1 In order to check the condition of the refrigerant, a humidity indicator and a sight glass are provided on top of the drier bottle, located in the front, left-hand corner of the engine compartment (see illustration).

19.1 Air conditioning system drier bottle sight glass (1) and humidity
19.1 Air conditioning system drier bottle sight glass (1) and humidity indicator (2)

Refrigerant humidity check 2 Check the colour of the humidity indicator.

Blue indicates that the condition of the refrigerant is satisfactory. Pink indicates that the refrigerant is saturated with humidity. If the indicator shows red, the system should be drained and recharged, and a new drier bottle should be fitted. Note: The system should be drained and recharged only by a Peugeot dealer or air conditioning specialist. Do not attempt to carry out the work yourself, as the refrigerant is a highly-dangerous substance (refer to Chapter 3).

Refrigerant flow check
3 Run the engine, and switch on the air conditioning.

4 After a few minutes, inspect the sight glass, and check the fluid flow. Clear fluid should be visible - if not, the following will help to diagnose the problem:
a) Clear fluid flow - the system is functioning correctly.

b) No fluid flow - have the system checked for leaks by a Peugeot dealer or air conditioning specialist.

c) Continuous stream of clear air bubbles in fluid - refrigerant level low - have the system recharged by a Peugeot dealer or air conditioning specialist.

d) Milky air bubbles visible - high humidity (see paragraph 2).


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