restore functionality tested successfully corrode reducing damaged components essential components visible damage extensive damage compatible parts wiring appliances ensure safety performance replacement power supply overheating issues internal components system loose functionality repairing performance issues qualified technician youre dealing critical aspect underlying problem obvious reason left unaddressed operations helping sustainable approach helps avoid responds correctly controlled conditions compressed air dust accumulation maintenance dirt steps inspection addressed promptly poor connection overheat due burns cracks expert technician apparent reason correct faults fixing faults current flow automatically interrupt mcb system malfunctioning mcb mcb works electrical components electrical system faulty components short circuits electrical shock mcb repairing contacts springs malfunctioning component corroded connections mcb board function properly mechanism ensures mcb trips common issues mcb switch repair process trip unit repaired mcb board time electrical connections ensure continued safety maintaining electrical safety prevents larger issues mcb board repair short circuit repairing replaced making repair repair technician begins mcb board inspected mcb board save mcb board allowing mcb board generally reset properly preventing equipment timely repairs mcb trips frequently faulty trip unit trip unit contacts properly functioning mcb electrical component mcbs mcbs effectiveness testing mcbs operation cleaning repair process cleaning costly downtime repairing switch mechanism disconnection switch mechanism inside significant electrical problems intended common problems required standards reinstallation