A common problem with Citroens is the heater
not working properly.
Vehicles affected include the Citroen C5 Mk III and Xsara Picasso
Owners may experience an intermittent heater blower fan, on one or more of the speed settings, or the fan may not work all, or will only work on full power, or may be stuck on full power.
Two types of controls are used, depending on whether the vehicle
has auto air-con or not.
Generally, it is the vehicles without auto air-con (climate control) that have the most common problems with the heater and this is the vehicle we are dealing with here.
The possible causes
There are two common causes of a heater blower fan problem in the
Citroen C5 without auto aircon:
Quite frequently, both faults will be present.
A. Faulty Heater Resistor (Otherwise known as the Heater Blower Resistor, Resistor Pack, Heater Rheostat or Blower Motor Resistor, Part No. 6450EP )
Usually, it is the thermal cut-out on it that fails.
Please don't be tempted to re-solder this joint or by-pass it.
This is your safety fuse and protects against potential fires.
An open circuit Heater Resistor Thermal Fuse
B. Overheated/Burned Heater Resistor
Wiring Loom Connector
The connector has a tendency to overheat and damage the loom.
An overheated/burned Heater Resistor Loom Connector
A. Faulty Heater Resistor
If it is the resistor has failed, replace the Heater Blower Resistor with new.
This comes complete with a new length of loom.
B. Overheated/Burned Heater Resistor Loom Connector.
Replace the wiring loom connector by fitting a Repair Loom.
C. Other Causes
There can, of course be other causes, like a faulty blower motor, or a blown fuse, but the two main causes above are far and away the most common.
Don't forget to try and determine why the fuse failed in the
usually, its because there has been too much load on the fan motor (or maybe the motor is faulty)
Check that your airways are clear and check/replace the cabin pollen filter.
Replacing the Heater Resistor Loom Connector:
To do this, you need to cut off the old connector, and connect the cables on the new loom kit to the original loom.
For safety, disconnect the battery first and make a note of the radio code.
Eliminate the possibility of making a wiring mistake by cutting and soldering only one cable at a time.
Heater Resistor Pack
Solutions for your vehicle.
Click on one of the links
below for more information
on economical solutions to
Heater Resistor problems
on your vehicle.
- Audi A3/S3, Q7, TT
- Alfa Romeo 147/156/GT
- Alfa Romeo Mito
- Chrysler Dodge Jeep
- Citroën C2 C3 C5
- Citroën C3 (without auto aircon / climate control)
- Citroen C4 C5
- Citroen C5 (without auto aircon / climate control)
- Citroen Jumper / Nemo
- Fiat Doblo II / Ducato
- Fiat Fiorino III / Qubo
- Fiat Punto (+ Grande & Evo)
- Honda Civic Mk VII/VIII
- Peugeot 1007 207 406 607
- Peugeot 206 / 307 (without auto aircon / climate control)
- Peugeot 207, 208, 508
- Peugeot Boxer / Bipper
- Renault Clio II
- Renault Clio III
- Renault Espace 4
- Renault Laguna 2
- Renault Megane/Scenic 2
- Renault Megane 2 (without digital aircon / climate control)
- Renault Megane 3
- Renault Modus (with digital aircon / climate control)
- Renault Modus (without digital aircon / climate control)
- Renault Scenic 2 (without digital aircon / climate control)
- Renault Thalia
- Seat Altea, Leon, Toledo
- Skoda Octavia, Superb
- Vauxhall/Opel Corsa D
- Vauxhall/Opel Zafira B
- VW Golf, Jetta, Passat
- VW Scirroco, Tiguan
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