One circuit dead while others work? Here's why it happens, how to troubleshoot it yourself, and when to call an electrician.
If half your house has no power, one circuit breaker has tripped or failed. Here's what to do:
Usually in garage, laundry, or external meter box. Open the cover and look at the breakers (switches inside).
Most breakers have two positions: ON (up) and OFF (down). Look for one that's in the OFF position or somewhere between (tripped).
Push the breaker firmly to OFF (down), then back to ON (up). If it clicks and stays on → power should restore. If it trips again immediately → electrical fault, call electrician.
Circuit breakers trip when they detect an electrical fault. Common causes:
If breaker tripped but resets successfully, try this to identify the problem appliance:
Unplug all appliances on the dead circuit. Turn off all switches.
If it stays on with everything unplugged → one of your appliances is faulty.
Plug in appliances one by one. When the breaker trips → that's your faulty appliance. Leave it unplugged and call electrician or replace appliance.
Call immediately if:
Many Adelaide homes have outdated switchboards with old ceramic fuse holders or early-generation breakers. These can fail without warning. If your home is pre-1990s and experiencing partial power loss, likely time for switchboard upgrade.
Adelaide storms can drive water into external meter boxes, roof spaces, and wall cavities. If power loss started during/after storm, water damage is likely cause. Needs immediate inspection before restoring power.
Older Adelaide homes often have undersized circuits for air con. If circuit trips when air con starts, the circuit might not be rated for the load. Solution: dedicated air con circuit upgrade.
I'm Marcus—licensed electrician servicing Adelaide metro. Here's my fault finding process:
Test each circuit for insulation resistance, earth leakage, and continuity. This identifies if fault is overload, short circuit, or ground fault.
Check outlets, switches, and visible wiring on the dead circuit. Look for damage, moisture, loose connections, or burn marks.
If wiring fault suspected, inspect cables in roof space for rodent damage, water damage, or deteriorating insulation.
Explain exactly what's wrong and give clear pricing for repair before starting work.
Typical fixes: Replace faulty breaker, repair/replace damaged wiring section, rewire circuit if insulation breakdown, install new outlet, dry out moisture damage.
Partial power outage? I provide fast fault finding and repairs across Adelaide metro. Most issues fixed same day. Call me directly—I'll talk you through quick checks and get you booked in.
Call Marcus: 0468 008 822Licensed SA Electrician PGE 305056 | Same-Day Service | Owner-Operated