Generator trips on one phase
We measure the current on each phase and check the breaker settings and the load layout.
Open 24/7 · We arrive within 1 hour across Gauteng · Established 2000
Horison
Generator repairs, servicing and maintenance in Horison, for the workshops, offices and shops along Ontdekkers Road near Westgate and the homes on the quieter streets.
Callout fee waived when you accept our written quote. 1-year workmanship guarantee. See prices

Yes, we repair generators in Horison, from the three-phase sets behind workshops, offices and shops on Ontdekkers Road to the home sets on the side streets. We are open 24/7 and arrive within 1 hour for breakdowns; each fault is measured and diagnosed first, then quoted in writing.
Horison lies along Ontdekkers Road on Roodepoort’s main east-west route, with Westgate Shopping Centre nearby and Discovery, Florida and Wilro Park as neighbours. The main road is lined with small businesses, from workshops to professional offices and shops, while the side streets are residential.
Many of those businesses run three-phase generators, and three-phase sets have a fault that home sets do not: unbalanced load. If most of the equipment sits on one phase, that phase sags or trips while the other two have spare capacity, and machines or computers misbehave. On a Horison visit we measure the load and voltage on each phase, check the AVR and breaker, and tell your electrician how to spread the load if needed.
Breakdowns attended 24/7. We diagnose first, then quote the repair in writing.
Planned services and maintenance plans for standby sets in Horison, booked for a time that suits you.
Customised maintenance contracts and SLAs, quoted in writing after we assess the generator and how it is used.
Three-phase business sets on Ontdekkers Road and home standby sets in the side streets make up most Horison bookings.
Starting, fuel and output faults on business and home sets in Horison.
Low or unstable voltage on one phase, traced to the load balance, AVR or alternator.
Oil, filters, coolant and the charger, booked before or after business hours.
Automatic changeover faults on workshop, office and shop sets.
A written plan for businesses. Plan clients are scheduled ahead of new callouts.
Breakdown support day and night. We arrive within 1 hour.
Quote request · Horison
Send your details and we will come back to you with a quote for the work in Horison. For a breakdown, call or WhatsApp: we are open 24/7 and arrive within 1 hour.
What happens next
Charlie, lead technician: Degree in Mechanical Engineering, Degree in Electrical Engineering, Diesel Plant Fitter. Generator specialists since 2000.
Business sets along Ontdekkers Road often fail on load balance or heavy motor starts, while home sets fail after standing.
We measure the current on each phase and check the breaker settings and the load layout.
An overloaded phase sags. We meter all three and trace the cause to the load, AVR or alternator.
Engine speed that drops under motor loads points to the governor or fuel delivery.
We test the battery under load, the charger and the starter.
A three-phase set is rated for its load spread evenly across all three phases. When one phase carries most of the equipment, it can sag or trip long before the set reaches its rating. We measure each phase under real working load, show you the numbers and recommend how your electrician can rebalance the circuits. That often solves faults that look like a failing generator.
We service three-phase commercial sets for Ontdekkers Road businesses, and single-phase home standby sets in the residential streets.
We service and repair the brands below. Tell us whether your set is single-phase or three-phase when you book.
Three-phase sets that start motors, compressors and welders, tested under real load.
Standby sets on Ontdekkers Road with automatic changeover and stable voltage.
Single-phase home sets in the side streets, serviced and repaired on site.
Three-phase faults are found with readings, not guesses.
Our lead technician holds degrees in electrical and mechanical engineering.
You approve the price before work starts, and our workmanship carries a 1-year guarantee.
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Call, WhatsApp or use the form with your suburb in Horison and what the generator is doing.
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Your description and photos tell us which checks to plan and which parts to bring.
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We are open 24/7. For breakdowns we arrive within 1 hour; services are booked for a time that suits you.
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The callout is R400 – R700 in business hours and R700 – R1,400 after hours. The callout fee is only payable if you do not accept the quotation. If you accept the quotation, the callout fee is waived.
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The fault is tested on site and quoted in writing.
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Only the work you accept goes ahead, with a 1-year workmanship guarantee.
One phase is probably carrying much more than the others. We measure each phase under load and recommend how to rebalance the circuits.
Yes. We repair workshop, office and shop generators along Ontdekkers Road and throughout Horison.
Yes. We repair and service home standby sets in Horison’s residential streets.
Yes. We are open 24/7 and arrive within 1 hour for breakdowns, and a repair can be done outside your trading hours.
Contact ProService Generator Repairs for onsite fault diagnosis and generator repairs in Horison and surrounding suburbs. Planned work is on our servicing & maintenance page.