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Webasto Air Top 24 - User Manual

Webasto Air Top 24
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,--
Jebasto
Feel
the
drive
Air
Heater
Air
Top 24/32
Gasoline/Diesel
HL 24/32 B
Gasoline
HL 24/32 D
Diesel
Workshop
Manual
www.butlertechnik.com
www.butlertechnik.com

Questions and Answers

  • D
    darleneromeroAug 1, 2025
    What to do if my Webasto Air Top 24 Heater shuts down due to faults during heating operation?
    • R
      Ronald McdonaldAug 1, 2025
      If your Webasto heater shuts down during operation, it could be due to several factors. Check the metering pump for proper functioning. Also, verify the ambient temperature to ensure the motor isn't overheating, and inspect the safety switch.
  • H
    Hannah HudsonAug 12, 2025
    How to fix Webasto Heater if it shuts down in 'fault lock out' mode?
    • C
      Chase KlineAug 12, 2025
      If your Webasto heater is in 'fault lock out' mode, try the following: switch on the heater, charge the battery, check and replace fuse F2 if necessary, check electric leads for earth connection and short circuit, replace fuse F1 if necessary, check electric leads and connections for the glow plug, check electric leads for interruptions, check the flame detector and electric leads for earth connection and short circuit, check the safety thermostat and safety switch, and check the metering pump for proper functioning.
  • S
    sallymitchellAug 21, 2025
    Why does my Webasto Air Top 24 give off too little heat?
    • R
      Richard BondAug 21, 2025
      If your Webasto heater isn't providing enough heat, there could be several reasons. A wiring fault could be the cause, so you should check the exhaust silencer and exhaust pipe. You might also need to check the delivery rate of the metering pump, adjust the CO value (check installation location or speed), clean the heat exchanger, replace the matting, check the drive unit, voltage, and combustion air and fuel quantities.

Summary

Technical Data

Technical Data of the Heaters

Detailed specifications for heater models.

Troubleshooting (Quick Diagnosis)

Heater shuts down in fault lock out mode

Steps to diagnose and resolve heater shutdowns due to errors.

Heater gives off too little heat

Troubleshooting steps for reduced heating performance.

Functional Description

Fault Lock-Out

Explanation of the heater's fault lock-out mechanism and conditions.

Components

Glow Plug (Not Applicable to Air Top!)

Information on the glow plug used for ignition in specific models.

Pencil-Tape Glow Plug (Unique to Air Top)

Information on the pencil-type glow plug for Air Top models.

Flame Detector

Function and troubleshooting of the flame detection sensor.

Temperature Limiter and Safety Switch

Safety components protecting against overheating and improper mounting.

Electronic Control Unit

Role and types of electronic control units for heater operation.

Notes on Repair and Disassembly

Maintenance of the Heater

Webasto Air Top 24 Specifications

General IconGeneral
Heating Capacity2.4 kW
Fuel TypeDiesel
Voltage12V or 24V
Weight3.5 kg
Heater TypeAir Heater
Operating Temperature Range-40°C to +40°C
Fuel Consumption0.24 l/h

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