Answer: A shorted rectifier or surge suppressor on the board is pulling too many amps. Ship the control board to UpFix. We replace failed power parts, bench-test at load, and warranty the fix.
Quick take: A home breaker that trips the instant you press “Start” usually means an internal short on the MCB, not a household wiring issue.
Common culprits
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Bridge rectifier short
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Metal‑oxide varistor (MOV) fail
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Drive motor seized (less common test by spinning the roller by hand)
DIY checklist
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Inspect the treadmill’s own line fuse. If it’s blackened, a surge likely hit the board.
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Disconnect the motor leads; power the treadmill without them. Still tripping? The MCB is shorted.
Inside the UpFix repair
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Isolation & cleaning: Boards arrive pre‑logged in our ERP system with photos for insurance records.
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Short hunting: Automated trace‑resistance testing pinpoints the damaged leg.
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Surge defense upgrade: We replace MOVs with higher‑joule parts and add slow‑blow fuses where design allows.
Cost & turnaround
A new MCB from the treadmill maker can run $300–$600—if it’s in stock. UpFix repairs for a fraction, typically $99–$169, and ships within 1-3 business day.
Call/Text 888‑979‑9343 or start your order online to keep your costs low and your workouts uninterrupted.