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    Andrew95's Avatar
    Andrew95 Posts: 1, Reputation: 1
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    #1

    Jul 18, 2010, 04:30 PM
    My 3 amp fuse keeps blowing in my furnaces.
    My 3 amp fuse keeps blowing in my furnace. Sometimes the fuse lasts a couple of hours and sometimes it lasts a couple of days. I've checked the wiring in my thermostats and they all seem to be connected fine. Last time I replaced the fuse I blew in the fuse contact and wiped off the fuse hoping the connection was just dusty. If the fuse blows again, what steps should I take to trouble shoot the problem? Thanks.
    bigbms's Avatar
    bigbms Posts: 5, Reputation: 1
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    #2

    Jul 18, 2010, 04:33 PM

    Try a higher amp fuse.(the next one up)
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #3

    Jul 18, 2010, 06:24 PM
    Quote Originally Posted by Andrew95 View Post
    My 3 amp fuse keeps blowing in my furnace. Sometimes the fuse lasts a couple of hours and sometimes it lasts a couple of days. I've checked the wiring in my thermostats and they all seem to be connected fine. Last time I replaced the fuse I blew in the fuse contact and wiped off the fuse hoping the connection was just dusty. If the fuse blows again, what steps should I take to trouble shoot the problem? Thanks.
    There is a reason the factory installed/reguires a 3 amp fuse. Find the short, repair but I would advise to not use a larger amp fuse,you might end up replacing more parts than need be by trying to cut corners
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