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Thread: GMP-075-3 Fuse

  1. #1
    DIY Junior Member vman's Avatar
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    Jan 2008
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    Massachusetts
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    Default GMP-075-3 Fuse

    The 3 amp fuse on this system blows EVERY year. Anyone have any suggestions as to why this happens?

  2. #2
    Homeowner Thatguy's Avatar
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    Aug 2008
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    MD
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    Default

    Maybe there is a tech bulletin out on this.

    With once/yr I'm thinking the fuse element fatigues from the many on/off - heating/cool down - cycles over the year but I don't know of any fuses that are specifically "fatigue resistant".
    With HVAC, it's hard to tell if the fuse failed from a transient overcurrent or fatigue.

    I guess you could put in a breaker.

    Post a schematic; maybe there is some design defect that can be seen.
    Last edited by Thatguy; 07-05-2009 at 09:03 AM.

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