Replacing Insulation And Cover Plate Causes Fuse To Blow - Plumbing - DIY Home Improvement | DIYChatroom
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Old 05-12-2015, 09:26 PM   #1
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Replacing insulation and cover plate causes fuse to blow


If I leave the insulation and cover plates off the water heater, it works great. When I replace the insulation and cover plate the fuse on the left side blows. I'm thinking the isulation is pushing either the thermostat onto the inner metal tank too much or a wire is uncovered and touching the inner metal tank when the insulation is pushed on.

Any suggestions would be great.
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Old 05-13-2015, 03:36 AM   #2
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Welcome to the forum. I agree with your reasoning. Makes sense. Did this just start happening? How old is water heater? Make and model?

Please post a picture with cover plate off. Thanks.

Have to troubleshoot a little more. Turn off main breaker to water heater and check for any loose or bad wiring connections and rule that out.

Others will be along with more suggestions.
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Old 05-13-2015, 09:55 AM   #3
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Thanks for replying. It is a Giant 152ETE-3F7M 2010. I had been working on it a while ago. I removed the lower element at one point as a means of saving myself in hopefully $120 cartridge for my shower. The element wasn't the problem so I cleaned sediment out of the bottom of the heater and replaced the element. I replaced the insulation and cover plate. I don't think it was immediate, but the fuse blew. When I took of the plate there was condensation on the element and some rusting. I changed the fuse, tightened the screws in the element, and cleaned up the rust, and made sure the wires and screws were clean and dry. I left the insulation and cover plate off. It worked fine for a couple of months. No condensation and no rusting. I put the insulation and plate back on yesterday and the fuse blew.
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Old 05-13-2015, 10:13 AM   #4
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Condensation does not naturally occur in the vicinity of the element hatches of a water heater. Are you sure that the tank has not sprung a leak?

This part may be tricky since it is hard to tell when the lower element kicks on, but when it does, use a (wood) stick to gently press here and there in the lower element hatch area with the cover plate and insulation patch removed.
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Old 05-13-2015, 05:58 PM   #5
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Your tank may have a seepage leak prior to a full blow out.
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