Question: The main breaker or an RCD trips several times a day, often when I turn on one appliance. Is the board broken, or is something in the house leaking current?
Answer: Frequent trips are usually a faulty appliance, an overloaded circuit, water on a socket or in the ceiling, or an aged DB with weak breakers. The RCD is protecting you — never bypass it. Isolate circuits, test appliances one by one, then redistribute loads or replace the faulty breaker. A smell of burning, an immediate re-trip, or trips only after rain need a same-day visit from an ST-registered wireman.
This page is whole-house or circuit tripping (overload, short, weak breaker). A residual-current device that trips without an obvious appliance is covered in more depth at RCCB tripping.
Common Causes in Klang Valley Homes
- A faulty appliance drawing excess current or shorting.
- Too many high-load appliances on one circuit.
- Water ingress on a socket or in the ceiling after rain.
- An aged DB box with weak breakers.
How to Read the Trip
| Pattern | Likely cause |
|---|---|
| Trips when one appliance starts | That appliance or its dedicated circuit |
| Trips when several things run together | Overload — redistribute |
| Immediate re-trip in seconds | Active short or earth leak — stop resetting |
| Only after rain | Water on a fitting or in the ceiling |
| Burning smell at a socket or the DB | Isolate power and call |
What You Can Do Safely
- Note which breaker moved and what was switched on.
- Unplug the last appliance and reset once.
- Do not keep resetting an immediate trip.
- Do not replace an RCD with a plain breaker.
What Diagnosis Involves
- Isolate each circuit to find the source.
- Test appliances one by one.
- Redistribute high-load appliances across circuits.
- Replace faulty breakers or upgrade the DB box. A DB can be upgraded in a day without rewiring the whole house.
Electrical work carries the 12-Month Electrical Workmanship Warranty and is done by ST-registered wiremen.
Costs in KL and Selangor
Published problem range is RM 180 to RM 1,800+. A typical DB upgrade with 6 to 12-way breakers, RCD and labelling is RM 850 to RM 1,800 installed. KL Servis Rumah publishes new power point and switch installation from RM 150 per point and DB box upgrade and rewiring from RM 2,200 when the scope includes rewiring, not just the board.
Use the electrical installation cost tool. For old-house wiring context see safe electrical wiring upgrade.
Related Problems
- RCCB tripping — residual-current trips without an obvious overload.
- Downlight flickering — a loose lighting circuit, not necessarily a trip.
- Water heater not heating — a heater that trips its own MCB.
Frequently Asked Questions
Is a tripping RCD dangerous?
The RCD is protecting you. Never bypass it. Get the cause diagnosed within 24 hours.
Can I upgrade the DB without rewiring the house?
Yes. The DB, breakers and RCDs can be upgraded in a single day without rewiring.
How much for a full DB upgrade in KL?
Typical 6 to 12-way with RCD and labelling: RM 850 to RM 1,800 by an ST-licensed electrician. Full upgrade and rewiring is published from RM 2,200.
Find the Circuit, Then Fix It
Resetting the same breaker all week is not a diagnosis. KL Servis Rumah provides electrical services across Kuala Lumpur and Selangor.
Tell us which breaker trips and what was on — WhatsApp our electrical team.