Service areas · Johannesburg
Generator Repairs in Johannesburg CBD: Towers, Flats and Shops
We repair generators across the Johannesburg CBD: standby systems under Marshalltown’s office and bank towers, the sets behind Hillbrow and Berea’s lifts and booster pumps, and units behind shops, wholesalers and Braamfontein’s student housing. 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 the Johannesburg CBD
Office, bank and government buildings: Control panel repairs
Plant-room systems under Marshalltown and around the Carlton Centre, reached through parking and security.
Blocks of flats in Hillbrow and Berea: Residential generator services
High-rise blocks where the set carries lifts and booster pumps; when it fails the upper floors lose water too.
Converted office blocks: ATS and changeover problems
Older office buildings now full of flats, their original set and changeover carrying a load never planned for.
Shops, traders and clinics: Commercial generator services
Small sets behind tills, cold rooms and vaccine fridges from Newtown to Maboneng, reached through a service lane.
Campuses and student housing: Standby generators
Wits, the colleges and Braamfontein’s student blocks, where a stopped lift or dark stairwell is a safety problem.
Repairs
Generator faults we fix in Johannesburg CBD
ATS and changeover problems
The set runs but the building stays dark, or the load never returns to the mains.
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.
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.
Generator won’t start: Generator not starting
Flat batteries, failed chargers, stale fuel and starter faults, fixed on site.
High-rise blocks
Lifts, booster pumps and the plant room
In Hillbrow and Berea the generator is a building service: water climbs through booster pumps and everyone uses the lifts. A set that cannot take that load leaves the top floors dry; a changeover that never transfers puts the block on the stairs.
The set sits in the basement or on the roof, reached through the building manager or caretaker. We ask for the plant-room key and the hour a transfer test is allowed.
- Access through the building manager or agent
- Lift and pump starting loads measured
- Day tank, transfer pump and float switch checked
Response
On site in the Johannesburg CBD in 1–2 hours
Technicians on site in 1–2 hours, 24/7. Fordsburg and Mayfair lie just west of Newtown and Jeppestown on the eastern side, so a technician comes in from whichever side is moving. Tell us the parking height limit and who signs contractors in.
Meanwhile the safe checks end at fuel level, emergency stop, main breaker and the controller screen; the changeover panel stays shut, and a set that will not catch is left alone rather than cranked flat. Send a photo of the controller and nameplate; emergency generator repair explains a call at night.
Every make
The makes we repair in the inner city
We Service & Repair All Generator Brands. Under the towers that means large diesel sets built around Cummins, Perkins, MTU or Volvo Penta engines with Stamford or Leroy-Somer alternators and DSE or ComAp controllers; in the blocks, canopied FG Wilson, SDMO or Himoinsa sets; behind the shops, Kipor, Bundu Power or Mac Afric silent diesels and Honda-engined petrol portables. See our brand pages.
Prevention
Why inner-city sets fail twice
Inner-city sets come back when the first visit stopped at the symptom: the same charger flattens the new battery, the same float switch empties the day tank, the same lift start trips the set. The job card names what will stop the building next.
Servicing avoids the second call: our Johannesburg CBD generator service and maintenance page covers plant-room and rooftop services and the intervals a month of outages brings forward. Generator repairs shows how a fault is found; we also cover Fordsburg and Mayfair, Parktown and Houghton, City Deep and the rest of Johannesburg.
Also in Johannesburg CBD
Generator service & maintenance in Johannesburg CBD
Regular servicing and a maintenance plan stop most of the faults on this page before they happen. See what a service in Johannesburg CBD includes, how often a set there needs one, and the plans we run.
Coverage
Where we repair generators in and around Johannesburg CBD
- MarshalltownOffice and bank towers, some converted to flats
- FerreirasdorpCovered with the CBD core
- NewtownOn the Fordsburg side of the inner city
- BraamfonteinWits, Constitution Hill, the Metro Centre and student housing
- Joubert ParkCovered with the CBD core
- HillbrowHigh-rise blocks reliant on lifts and booster pumps
- BereaHigh-rise blocks, covered with Hillbrow
- DoornfonteinEllis Park Stadium, on the eastern side
- Jeppestown and MabonengThe Maboneng precinct, on the eastern side
- YeovilleInner-city suburb, covered from the CBD
- BellevueCovered with Yeoville
- BertramsCovered from the CBD
Service areas
Other areas we cover
FAQ
Frequently asked questions
The lifts in our Hillbrow block stop mid-trip on generator power. What is wrong?
The set is not holding speed and voltage as the lift motors start: a worn governor, a slow AVR or a set too small for the block. We measure the dip under a real lift start; see voltage problems.
Our tower cannot go onto generator power in office hours. Can you still repair the set?
Yes. Diagnosis and most of the repair happen on mains by day; the transfer test that proves it goes into an evening or weekend slot agreed with building management. We work 24/7.
Our shop’s petrol generator will not start after months standing. Can you fix it?
Usually. Stale petrol gums the carburettor and a battery or recoil start fails from standing. We clean the fuel system, refuel and test it behind the shop; see generator won’t start.
A tenant runs a portable generator in the passage. Is that safe?
No. Exhaust in a passage or stairwell is a carbon monoxide risk for the whole floor, and a lead into a wall socket can back-feed the building. Portables run outdoors, away from windows, through a proper lead or fitted changeover.
Related pages
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