2007 9400i fan high blows breaker

Discussion in 'International Forum' started by God prefers Diesels, Sep 15, 2020.

  1. God prefers Diesels

    God prefers Diesels Light Load Member

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    Works fine on 1 - 3. On setting 4, it runs about ten seconds, and trips the breaker.

    I've read the other threads. Here's what I've done: Replaced the resistor, swapped breakers, swapped hi-speed relay. When I replaced the resistor, there is an L-shaped shroud under it. It was facing the blower motor, and that's how I reinstalled it. Is it to keep airflow off the bottom of the resistor, or is it installed the wrong direction, and it's actually a heat shield for the plastic housing? Could that be my problem, or do I need a new blower motor? Thanks.
     
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  3. Hegemeister

    Hegemeister Road Train Member

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    I had a problem with the condenser fan on my APU. Short story, the bearings on the fan began to wear causing resistance which caused increased current blowing the fuse.
     
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  4. Heavyd

    Heavyd Road Train Member

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    All the speeds go through different wiring, so either the blower motor itself is getting tired and blows only on high speed, or the actual high speed feed wire is shorted somewhere. You would have to pull the seat and blower cover to access the blower, then unplug it and then select high speed again. If the breaker does not trip, then you have a bad blower.
     
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