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Webasto Air Top Evo 40 Series - User Manual

Webasto Air Top Evo 40 Series
63 pages
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Air Heater
Air Top Evo 40/55
Air Top Evo 40 B / Air Top Evo 55 B (Benzin)
Air Top Evo 40 D / Air Top Evo 55 D (Diesel)
Service Manual

Table of Contents

Questions and Answers

  • T
    tmartinezAug 4, 2025
    Why my Webasto Air Top Evo 40 has no start and no flame formation?
    • G
      garciajessicaAug 5, 2025
      If your Webasto Heater fails to start and there's no flame, examine the fuel supply, ensuring the tank isn't empty and the lines aren't blocked. Also, inspect the exhaust temperature sensor for any deposits and carefully clean if necessary. Finally, check the evaporator mount and replace it if needed.
  • A
    Amanda GonzalesAug 11, 2025
    How to fix Webasto Air Top Evo 40 with defective control unit or heater lock-out?
    • K
      Kristin MartinezAug 11, 2025
      If the control unit of your Webasto Heater is defective, or if there's a heater lock-out or a defective internal room temperature sensor: 1. Replace the control unit. 2. To delete a heater lock-out: Switch on the unit and remove the fuse. Reinstall the fuse after more than 2 seconds and switch the unit on again.
  • J
    Jocelyn PetersenAug 20, 2025
    What to do if my Webasto Air Top Evo 40 cuts out automatically?
    • J
      Jessica CarterAug 20, 2025
      If your Webasto Heater cuts out automatically, try the following: * Switch the heater off and then on again. * Ensure the hot air guide is clear, allow the heater to cool, then briefly switch it off and on again. * Check the battery charge.
  • O
    owenmasonAug 27, 2025
    Why does my Webasto Heater emit black smoke?
    • M
      Mrs. Amanda MolinaAug 27, 2025
      If your Webasto Heater emits black smoke, the combustion air and/or exhaust system may be blocked. Check that both the combustion air and exhaust systems are clear.

Summary

Introduction

1.4 Statutory Regulations and Safety Instructions

Covers legal requirements and general safety rules for installation.

General Description

2.1 Drive Unit

Describes the motor, combustion air fan, and heating air fan assembly.

2.7 Control Unit

Describes the central component managing operating sequences and signals.

Function Description

3.8 Fault Switch-Off

Explains how the heater shuts down in case of faults.

Technical Data

Troubleshooting

5.2 General Error Symptoms

Lists common error symptoms and their possible causes.

5.3 Error Symptoms During Function

Details error symptoms that occur during heater operation.

5.4 Fault code displayed in control element

Explains fault codes and their meanings for diagnosis.

Functional Checks

6.4 Tests of Individual Components

Details tests for specific heater components.

Service Work

8.2 Work on Heater

Outlines specific tasks for working on the heater itself.

8.6 Visual inspections and installation instructions

Covers visual checks and installation guidance.

8.7 Removal and Installation

Provides steps for removing and installing the heater.

Repair

9.2 Dismantling and assembling

Covers the process of taking apart and reassembling the heater.

Webasto Air Top Evo 40 Series Specifications

General IconGeneral
Heating power1.5 - 4.0 kW
Fuel consumption0.18 - 0.49 l/h
Rated voltage12V / 24V
Power consumption15 - 40 W
Heating mediumAir
Fuel typeDiesel
Current consumption1.25 - 3.33 A

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