Service areas · Pretoria
Generator Repairs in Annlin and Wonderboom, North of the Magaliesberg
We repair generators north of the Magaliesberg: home and complex sets in Annlin, Magalieskruin and Pretoria North, workshop sets, standby sets at Wonderboom Airport and Onderstepoort, and borehole sets on Bon Accord holdings. Technicians are on site in 1–2 hours.
Established 2006
20 years of experience
24/7 operations
Technicians on site in 1–2 hours
Free callouts and quotations
One-year warranty
Qualified and certified technicians
We Service & Repair All Generator Brands
All generator makes and models
1 kVA–20,000 kVA capability
Local generators
Generators we work on in Annlin and Wonderboom
Family homes: Residential generator services
Silent diesels on a slab beside the house in Annlin, Wolmer and Dorandia, wired in through a changeover.
Townhouse complexes: Standby generators
A shared set behind the guardhouse carrying the gate motor, lights and intercom; the trustees arrange access.
Workshops and light industry: Industrial generator services
Three-phase sets carrying compressors, welders and motors, where a slow AVR shows the moment a motor starts.
Wonderboom Airport: Commercial generator services
Sets behind hangars and offices of aviation businesses, about 15 km north of the city centre, reached through airport security.
Onderstepoort campus and labs: ATS and changeover problems
Standby sets at veterinary and research facilities, where fridges and equipment cannot wait for the mains.
Bon Accord smallholdings: Diesel generators
Diesel and petrol sets pumping boreholes and running the house, behind a farm gate off the R101.
Repairs
Generator faults we fix in Annlin and Wonderboom
Battery and charging faults: Battery not charging
Chargers, charge alternators and batteries that cannot crank the set when the mains fails.
Fuel and injector faults: Fuel system repairs
Contaminated diesel, blocked filters, air in the lines, lift pumps and injectors.
ATS and changeover problems
The set runs but the building stays dark, or the load never returns to the mains.
Generator won’t start: Generator not starting
Flat batteries, failed chargers, stale fuel and starter faults, fixed on site.
AVR and voltage faults: Voltage problems
Low, high or swinging voltage from the AVR, exciter or rotating diodes.
Overheating
Shutdowns from blocked radiators, failed fans, thermostats and coolant leaks.
Smallholdings
Borehole pumps and stored diesel at Bon Accord
Many Bon Accord holdings beside the dam draw water from a borehole, so in an outage the generator carries the pump as well as the house. A pump motor draws several times its running current to start, and a set that copes with lights and a fridge can stall then.
Diesel on a holding often sits in drums or containers against a wall for months. Condensation and sediment settle, and the set blocks its filters or starves mid-outage. We trace both faults on the plot, then test with the pump running.
- Borehole pump starting load measured
- Filters, water separator and lift pump checked
- Stored diesel inspected for water and sediment
- Set tested with the pump and house on together
Response
On site in Annlin and Wonderboom in 1–2 hours
Technicians on site in 1–2 hours, 24/7. The area lies north of the Magaliesberg ridge, with the Apies River between Pretoria North and Annlin; the R566 and the Soutpan road reach Onderstepoort, and the R101 runs past Bon Accord. Tell us who opens the complex or farm gate, or signs contractors in at the airport.
Meanwhile, check only the fuel level, main breaker, emergency stop and controller screen, and stop cranking after two tries to save the battery. Keep a portable outdoors, away from windows, and never plug it into a wall socket. Electrical, fuel and changeover work is for the technician.
Every make
Generator makes we fix north of the ridge
We Service & Repair All Generator Brands. Annlin and Magalieskruin homes mostly have silent diesels from Bundu Power, Kipor and Mac Afric, or Honda-engined petrol portables. Bon Accord borehole sets are often small air-cooled Kipor or Lutian diesels. Workshops, the airport and Onderstepoort run larger sets on Perkins, Cummins or Deutz engines, with Stamford or Mecc Alte alternators and Deep Sea Electronics or SmartGen controllers.
Prevention
Why a generator in Annlin or Wonderboom fails again
A repeat breakdown here usually has a cause nobody removed: a holding refills from the same wet drum and blocks the new filter, a home battery dies again because its charger was never tested, or worn changeover contacts are cleaned rather than replaced.
Planned servicing ends that cycle. The Annlin and Wonderboom generator service and maintenance page covers homes, complexes, holdings, hangars and labs. Our generator repair service explains how we find faults; we also attend breakdowns in Montana and Sinoville, Akasia and Rosslyn, across the Pretoria North sub-region and the Pretoria hub.
Also in Annlin and Wonderboom
Generator service & maintenance in Annlin and Wonderboom
Regular servicing and a maintenance plan stop most of the faults on this page before they happen. See what a service in Annlin and Wonderboom includes, how often a set there needs one, and the plans we run.
Coverage
Where we repair generators in and around Annlin and Wonderboom
- Pretoria NorthThe suburb on the west bank of the Apies River
- AnnlinAcross the Apies River from Pretoria North
- WonderboomWonderboom Airport, the nature reserve and the Magaliesberg ridge
- Magalieskruin, Dorandia and WolmerSuburbs of family homes, complexes and small businesses
- OnderstepoortNorthern fringe, with the University of Pretoria’s veterinary faculty
- Bon AccordSmallholdings beside the Bon Accord Dam on the R101, many with boreholes
Service areas
Other areas we cover
FAQ
Frequently asked questions
Our Bon Accord borehole set stalls whenever the pump kicks in. Can you fix it?
Usually. The pump’s starting surge exposes a small set, a slow AVR, a weak governor or a fuel restriction. We measure the start on the plot and repair the fault, or tell you if the set is too small.
Can you repair the generator at our hangar at Wonderboom Airport?
Yes. Tell us the hangar or building and who signs contractors in, and we arrange the visit with you, 24/7. Send a photo of the controller screen so the likely parts come along.
Our Magalieskruin complex set runs, but the gate and lights stay off. Why?
That points to the changeover rather than the engine: a failed contactor, a mains-sensing fault or a tripped breaker on the generator side. We find which and test the transfer with the trustees present.
My petrol portable in Annlin starts, then dies after a minute. What is wrong?
Usually stale petrol gumming the carburettor, a blocked fuel tap or the low-oil cut-out. We clean the fuel system, change the oil and test it under load. Never connect it to a house socket.
Related pages
Related services
Related generator problems
Generator types
Who we work for
Need a generator technician?
- 24/7 operations
- Technicians on site in 1–2 hours
- Free callouts and quotations