Remove

Disconnect the wires from the battery terminals, starting with the negative terminal.

Remove the relay socket to access the passenger compartment blower control ECU.

Remove the air supply duct to the front left of the passenger compartment.

Disconnecting the accelerator harness connector

Disconnect the accelerator pedal position sensor connector (fig. 1).

Removing the brake light switch

Remove the brake light switch by turning it a quarter of a turn (fig. 2).

Replacing heating ECU Renault Megane 2

Disconnect the connector of the passenger compartment electric fan ECU (Fig. 3)

Replacing heating ECU Renault Megane 2

Inspecting the connector for burnt contacts

Replacing heating ECU Renault Megane 2

Remove the two screws securing the passenger compartment fan control ECU

Replacing heating ECU Renault Megane 2

Removing the electric fan ECU

Replacing heating ECU Renault Megane 2

We press the latch and remove the block of wires from the passenger compartment electric fan

Replacing heating ECU Renault Megane 2

This is how the ECU of the electric heater fan looks like, a car without climate control (Fig. 8).

Replacing heating ECU Renault Megane 2

If the car is equipped with climate control, then the ECU is of the type shown in Figure 9.

Replacing heating ECU Renault Megane 2

Part number (Fig. 10)

Replacing heating ECU Renault Megane 2

To remove such a block, you will need to disconnect the connector from the clip, which prevents the block fastening bolts from approaching.

Remove the two screws with a TORX 20 socket.

Remove block.

Replacing heating ECU Renault Megane 2

To disconnect the harness blocks, press the central lock with a slotted screwdriver and remove the two connectors.

pc. there was a case of failure of the heater electric fan, on a car with climate control.

Having removed the heater ECU unit, disconnected the two parts of the ECU unit casing, brushed the accumulated dust on the electrical part of the board.

After that, set the block in place.

The electric fan started working like new.

Installation is done in reverse order