GMP-075-3 Fuse

Discussion in 'HVAC Heating & Cooling' started by vman, Jul 5, 2009.

  1. vman

    vman New Member

    Messages:
    27
    Location:
    Massachusetts
    The 3 amp fuse on this system blows EVERY year. Anyone have any suggestions as to why this happens?
  2. Thatguy

    Thatguy Homeowner

    Messages:
    1,460
    Location:
    MD
    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: Jul 5, 2009
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