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Williams 3509622A Fuse
In a wall unit, the fuse serves as electric safety net in the rare case of a sudden short or any overloading of the electrical current. It is wise to figure out why the fuse erupted so you can see of there is a bigger problem.
Red flags the interior fuse has to be replaced
- It is unable to power on even when 120V is coming in to the wall unit
- The fuse looks charred and probably blown when initially seen
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