Truma Combi 4 Recirculating Air Fan Wheel Repair
hainzy and one other contributor
Last updated on Oct 25, 2025
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Community-Contributed Guide
An awesome member of our community made this guide. It was not created by iFixit staff.
Introduction
Go to step 1 ↓In this guide, I'll show you how to replace the fan wheel for the recirculating air (34000-04700) on the Truma heater.
This wheel transports the recirculating air into the heater and ensures that the air is distributed throughout the vehicle via the ducts.
This replacement can be necessary, for example, if it is making noises or is damaged. If the performance of the recirculating air motor decreases, or if the power consumption in ventilation mode is significantly increased.
What you need
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lift the cover forwards out of the rail
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pay attention to the detents / tabs on the rail
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remove the four screws with the Torx 20 screwdriver
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remove the four screws of the cover with the Torx 20 screwdriver
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Position the fan wheel by turning it so that, ...
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... that the hole in the fan wheel is facing upwards
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Now, loosen the Allen screw with the 2mm Allen key.
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Loosen the screw using the long end as a lever.
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loosen (do not remove!) the screw from above until the wheel can be pulled off the motor shaft without any problems
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Ask FixBot
To reassemble your device, folloe the steps in reverse order.
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