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How do I check if a fuse has been burned and how do I obtain a replacement fuse?

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Good question-- let me ask a couple, and see if this helps us both:

1.) Is it a glass cartridge type fuse (Small-- about an inch long, and 1/4" in dia?
Often you can see inside of these, and tell, that the tiny "filament-like wire' has blown-- Usually there is some balckened residue inside the glass.

2.) Other fuses are best removed from their holders, and checked with a continuity tester. (Be sure to remove the power cord from the wall before touching the fuse.)

3.) If you can get an Ohmmeter-- or a continuity tester (some call them multi-testers)
You take the fuse out, put it on the bench, take the 2 leads from your tester-- touch the tips together, and you will get an indication of what is a CONTINUOUS circuit..
This is the same indication you will see for a GOOD fuse..

If a fuse is blown-- it will be the same as when you hold the 2 leads apart-- Infinite ohms or OPEN.

Does that make sense?

Mack B

Posted on Dec 28, 2010

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