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Friedrich UE12A33B Fuse
In a wall unit, the fuse behaves as a version of electrical defense in case of a sudden short or any overloading of the current. Always play it safe and attempt to figure out why a fuse blows to check for any safety issues.
Simple signals the main fuse is in dire need of a replacement
- The fused relay looks blackened and blown at first glance
- The wall unit will not activate even though power is arriving to the unit
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