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Friedrich US12B10A Fuse
In a wall unit, the fuse performs as electricity protector in the case of a short circuit or any overloading of the electrical current. Be safe and try to find out why the main fuse has blown in order to figure out if there is a major problem elsewhere.
Important signs the fused relay needs replacing ASAP
- It refuses to activate even when 120V is coming into the unit
- The internal fuse looks smoky and blown when you first see it
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