Power Failure Diagnostics in Johannesburg & Sandton

You come home and half the house has no power — or everything is dead. Before you call your municipality, the problem is almost certainly inside your property: a tripped earth-leakage unit, a failed breaker, a loose neutral connection, or a fault on a single circuit dragging down the rest. Apple Plumbing & Electrical diagnoses power failures across Johannesburg, Sandton, Midrand, Fourways and Bryanston using proper test instruments — insulation resistance testers, clamp meters, thermal imaging and breaker-curve testers — so we find the actual cause on the first visit instead of swapping parts until something works.

What we do

We systematically isolate and test every circuit to determine whether the fault is on the supply side (municipal outage, failed service cable, meter-box problem) or the property side (tripped earth leakage, failed breaker, wiring fault, neutral failure). Insulation resistance testing identifies circuits with damaged cable or water ingress. Thermal imaging detects overheating connections and breakers. Breaker testing confirms whether a breaker has failed internally. Once the cause is found, we repair or replace the faulty component, re-test the entire board, and issue a Certificate of Compliance where the scope of work requires it.

Signs you need this service

• Complete power loss with no municipal outage reported
• Half the house has power and half doesn't
• Earth-leakage trips immediately after reset
• Power comes back after load-shedding but some circuits stay dead
• Lights flicker or dim when appliances switch on
• Burning smell from the DB board or a wall socket

Our process

1. 1Phone triage — we'll ask you to check the DB board and describe what you see
2. 2On-site: verify whether the supply is live at the meter
3. 3Systematic circuit-by-circuit isolation and insulation resistance testing
4. 4Thermal imaging of DB board and high-load connections
5. 5Identify root cause — failed breaker, wiring fault, neutral failure or supply issue
6. 6Repair or replace and re-test the full board before leaving

Pricing

Power failure diagnostic callout R650–R1,200 including the first hour of diagnosis. Most residential power failures are diagnosed and repaired within 1–2 hours. Component replacement (breakers, earth-leakage units, neutral links) is quoted on site once the cause is known.

Prices are indicative for Northern Johannesburg, 2026. Every job is quoted in writing on site before work proceeds.

Why choose Apple Plumbing & Electrical

We carry calibrated insulation testers, clamp meters and a thermal imager on every callout — not just a multimeter. That means we find intermittent faults, failing insulation and overheating connections that a basic test would miss. Every repair is tested, documented and covered by our workmanship warranty.

Frequently asked questions