Description
Overview
This BEHR heater servo motor is an OEM-quality HVAC actuator designed for PSA group vehicles. Identified by part codes EAM501, A7583Ua13 and 6447QN, the unit drives the heater/blend flaps inside the heating and ventilation box to accurately regulate cabin temperature and air distribution. It is aimed at professional mechanics and competent DIY technicians who search by part number for a reliable replacement.
Function And Symptoms
The servo motor moves blend or distribution flaps according to commands from the climate control module. Faulty actuators typically cause incorrect temperature mixing, restricted airflow, unusual clicking noises behind the dash, or error messages on vehicles with advanced HVAC diagnostics. Replacing a failed servo restores precise temperature control and eliminates intermittent vent position issues.
Replacement And Fitment Notes
Replacement is straightforward for an experienced mechanic. Typical steps:
- Disconnect the battery and allow systems to power down.
- Remove glovebox or lower dash trim to access the HVAC housing (vehicle dependent).
- Unplug the electrical connector and remove retaining screws securing the actuator.
- Fit the new servo in the correct position, secure fasteners, reconnect the plug and check operation with the climate controls.
Use basic hand tools (screwdrivers, Torx set, trim tools). Always verify correct initial flap position after installation to avoid gear misalignment.
Durability And Common Causes Of Failure
HVAC servos are mechanical and electrical assemblies; common failure modes include stripped plastic gear teeth, worn motor brushes, moisture ingress, or electrical connector/cable faults. Failures most often occur after years of use or following water exposure, and symptoms can be intermittent before full failure.
Technical Information
Manufacturer: BEHR
Model: Heater Servo Motor (suitable for PSA group vehicles, e.g., Citroën C2, Citroën C3 – verify fitment)
Product Codes: EAM501, A7583Ua13, 6447QN
Additional Numbers: Check vehicle VIN or OEM parts catalogue for cross-references and confirm by part number before ordering.
