Renault Megane Quiz
Air conditioning

Fault location tree

In this manual: Air conditioning
Engine and peripherals — 141Chassis — 79Chassis — 72Renault Mégane III Driver's Manual — 87Electrical equipment — 221Engine and peripherals — 47Electrical equipment — 80Transmission — 14Air conditioning — 30Bodywork — 115Trim and upholstery — 44General vehicle information — 27Air conditioning — 59General vehicle information — 16Transmission — 38Sealing and soundproofing — 7General vehicle information — 3
~3min read
ALP 6 No heating or insufficient heating

INSTRUCTIONS

Only consult this customer complaint after a complete check with the diagnostic tool (reading of faults and verification of configurations).

Pas de chauffage ou manque de cha
Pas de chauffage ou manque de cha

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 7 Too much heating

INSTRUCTIONS

Only consult this customer complaint after a complete check with the diagnostic tool (reading of faults and verification of configurations).

Trop de chauffage
Trop de chauffage

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 8 No cooling

INSTRUCTIONS

Only carry out this conformity check after a complete check with the diagnostic tool (reading of faults and verification of configurations).

Pas de froid
Pas de froid
Pas de froid
Pas de froid
Pas de froid

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 9 Too much cooling

INSTRUCTIONS

Only consult this customer complaint after a complete check with the diagnostic tool (reading of faults and verification of configurations).

Trop de froid
Trop de froid

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 10 Insufficient rear window defrosting or demisting

INSTRUCTIONS

Only consult this customer complaint after a complete check with the diagnostic tool (reading of faults, in particular of the protection and switching unit, and verification of configurations).

Special features:

  • Check that the windows are not greasy on the inside, as this would reduce the defrosting efficiency.

NOTE: For reasons of electrical consumption, the defrost control is only enabled with the engine running.

The rear window defrost control operates in two ways:

  • A single press of the defrost button (at the bottom of the control panel) activates the rear window defroster in manual mode (with timer) and the mirror defrosting.
  • A single press of the defrost button at the top of the control panel activates the "Clear view" function: rear window defroster in automatic mode (no timer), mirror defrosting, air conditioning engagement and windscreen ventilation at high speed.
Manque d'efficacité du dégivrage ou du désembuage de la lunette arrièr
Manque d'efficacité du dégivrage ou du désembuage de la lunette arrièr
Manque d'efficacité du dégivrage ou du désembuage de la lunette arrièr

AFTER REPAIR

Carry out a full check with the diagnostic tool.

ALP 14 Compressor noises

INSTRUCTIONS

Only consult this customer complaint after a complete check with the diagnostic tool (reading of faults and verification of configurations).

Make sure that the ECUs involved in the AIR CONDITIONING function (Injection, Protection and Switching Unit, Passenger Compartment Central Unit and Air Conditioning control panel) are correctly configured.

Reconfigure if necessary (see the configurations chapter at the beginning of this manual).
Make sure that the compressor fitted to the vehicle matches the engine (see the table in the "Air conditioning function" note).

Replace the compressor if necessary.
Check that the compressor belt is in good condition and check its tension (for engines without an automatic tensioner).

Replace the belt if necessary.
Make sure that the compressor is correctly secured.

Repair if necessary.
Check the refrigerant charge of 550 g ± 25 g and check for leaks, as a significant loss of fluid can cause compressor noise.

Recharge if necessary.
If the problem persists, replace the air conditioning compressor.

AFTER REPAIR

Carry out a full check with the diagnostic tool.

Test yourself

A quick Renault Megane quiz: every answer comes with an explanation and a link to the manual page.