empfohlen Diesel Heater E29 Fault Code: Blower Motor Speed Too Low — Diagnosis and Fix
E29 (blink code 11101) on HLN air heaters means blower speed below 300 rpm. Check for blockage, a distorted mounting surface, and — a documented real-world cause — a power source that can't deliver the 15 A the heater needs at start.
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Diesel Heater E21 Fault Code: Blower Motor Short Circuit — Test Before You Replace
E21 (blink code 10101) means excessive current on the blower motor circuit. One current measurement tells you whether to replace the motor or look at the ECU — do the test before buying parts.
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