Truma Combi 4 Recirculating Air Fan Wheel Cleaning
hainzy and 2 other contributors
Last updated on May 21, 2026
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Introduction
Go to step 1 ↓In this guide, I'll show you how to clean the recirculating air fan wheel of the Truma Combi 4.
What you need
Tools
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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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If it is heavily soiled, clean the fins individually and carefully with cotton swabs.
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Do not use any other materials, especially no metal objects! The fins are very sensitive.
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Ask FixBot
To reassemble your device, follow the steps in reverse order.
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