What We Do
Professional Generator Services Across Gauteng
A directory of ProService Generator Repairs services: repairs, scheduled servicing, preventative maintenance and emergency callouts. Installation is an additional service. Controller work sits with electrical and control support — diesel and petrol, across Johannesburg, Pretoria, Midrand, Centurion and Gauteng.
Onsite generator service across Gauteng · Written quote before work starts
Generator Repairs
Diagnosis and repair across Johannesburg, Pretoria, Midrand and the wider Gauteng area. Some common parts are carried. If a part is not on the van, that is said before it is ordered.
- Cummins, Perkins, Caterpillar, Deutz, Volvo and other sets seen on site
- Portable petrol units and larger diesel standby sets
- The fault is named before parts are changed
- Workmanship warrant for 90 days, as set out in the terms
Generator Servicing
Regular servicing is the single most effective way to extend your generator's lifespan and prevent unexpected breakdowns. Our comprehensive service covers oil and filter changes, coolant inspection, belt checks, battery testing, and a full load test — available across all Gauteng regions.
- Full oil and filter change with quality-spec lubricants
- Coolant system inspection and top-up
- Air and fuel filter replacement
- Battery and charging system check
Maintenance Plans
A maintenance plan is the ongoing schedule for a generator that has to stay ready. Intervals follow running hours, the calendar and how the set is used. A single oil-and-filter visit is booked as servicing.
- Schedule set by hours, calendar or how the set is used
- Notes kept from each visit for that generator
- A breakdown between visits booked when a slot is open
- Labour rates confirmed when the plan is quoted
Emergency Callouts
When your generator fails mid-loadshedding or during a critical power event, you need an emergency callout. We cover Johannesburg, Pretoria, Midrand, Centurion and the rest of Gauteng, with same-day appointments subject to availability.
- Same-day visits when a slot is open, confirmed on the call
- Residential, commercial and industrial breakdowns
- The fault is named before parts are changed
- Gauteng coverage, arranged from the call
Load Bank Testing
A standby set that rarely carries load can leave unburned fuel in the exhaust. Load bank testing applies a controlled electrical load so output can be checked under load. The visit includes a note of the steps and the readings.
- Tests generator at 50%, 75% and 100% rated capacity
- A loaded run can show faults that a no-load start hides
- A record of the load steps and the readings
- Identifies capacity shortfalls before they become emergencies
AVR & Voltage Regulator Repairs
A faulty Automatic Voltage Regulator causes fluctuating or incorrect output voltage, which can damage connected equipment. Our technicians diagnose AVR faults, replace failed units with quality-matched components, and test voltage stability under load to confirm clean, consistent power output.
- Diagnosis of voltage fluctuation and instability faults
- AVR replacement with OEM-spec or quality aftermarket units
- Voltage output testing under varying load conditions
- Applicable to all generator brands and alternator types
Control Panel Repairs
Modern generators rely on digital control panels and AMF (Automatic Main Failure) controllers to manage automatic starting and load transfer. When these systems fault, your generator may fail to start during loadshedding. Control-panel work covers the families listed on that page, not every controller ever fitted.
- AMF and ATS controller diagnosis and repair
- DSE, ComAp, Deepsea and SmartGen controller support
- Relay, fuse and circuit board replacement
- Full auto-start and shutdown cycle testing
Fuel System Repairs
Diesel degradation, water contamination, and blocked injectors are among the most common causes of generator failure in South Africa. Our fuel system service covers fuel polishing, injector cleaning and replacement, lift pump and injection pump repairs, and fuel tank cleaning.
- Fuel polishing and contamination removal
- Injector cleaning, testing and replacement
- Fuel lift pump and injection pump repairs
- Fuel tank inspection and internal cleaning
Generator Rewinding
When a generator alternator suffers winding failure — from insulation breakdown, overloading, or moisture ingress — rewinding is assessed against replacing the alternator. The workshop rewinds stators and rotors and tests insulation resistance before return.
- Stator and rotor rewinding to OEM specifications
- Insulation resistance testing before and after rewind
- Assessed on the alternator that is fitted, including Stamford, Leroy Somer, Mecc Alte and Marathon
- Compared with replacement before the rewind is approved
Additional
Additional Generator Services
Installation is available when a generator is being placed. Repairs, servicing and maintenance remain the primary services above.
Electrical and control
Generator Electrical & Control Services
Controller diagnosis, replacement and programming is a specialist electrical capability. It sits with the control panel, the ATS and existing controller repairs.
Technical Services
Fault finding, alternators and commercial plant
These pages sit beside the main service list. They cover diagnosis, the alternator, automatic transfer, the controller module, and repairs for commercial premises or larger industrial sets.
- Generator Fault FindingIdentify the cause before parts are replaced
- Alternator RepairsOutput, excitation and winding assessment
- ATS RepairsAutomatic transfer switch faults
- Controller RepairsDSE, SmartGen and module faults
- Commercial Generator RepairsOffices, retail, complexes and warehouses
- Industrial Generator RepairsLarger diesel and heavy standby systems
Starting and Fuel
Charging, starters and diesel fuel
These pages sit beside the main service list. They cover the charging system, the starter, and diesel fuel delivery without replacing the broader repair pages.
- Battery Charging SystemChargers, cables and standby batteries
- Starter Motor RepairsClick, slow crank and no crank
- Fuel Solenoid RepairsDiesel shutoff and run solenoids
- Fuel Pump RepairsLift pumps and fuel delivery
- Diesel Injector ServiceHard starting, smoke and rough running
- Generator GuidesService intervals, ratings and data plates
Cooling and Engine
Cooling, oil and diesel smoke
Cooling-system repairs, coolant loss, oil leaks and oil-pressure alarms are separate from a general overheating page. Black smoke and white smoke are separate diesel symptoms.
Generator Faults
Common generator problems we diagnose
If the set already has a fault, these pages explain the symptoms we see on site and the repairs that usually follow — without treating every breakdown as the same job.
- Generator Not StartingWill not start, even in manual
- Cranks But Won't StartEngine turns, will not fire
- Not Auto StartingStandby set stays silent when mains fails
- Starts Then StopsFires, then shuts down
- Trips Under LoadRuns until the load is connected
- Not Producing PowerRuns, but there is no usable output
- Low VoltageVoltage is present but too low
- Unstable VoltageVoltage hunts or lights flicker
- Low FrequencyHz or engine speed is too low
- Generator OverheatingHigh-temperature shutdowns
- Diesel Generator RepairsStandby and commercial diesels
- Petrol Generator RepairsHome and portable petrol units
Planning a Visit
Sizes, makes and how a callout works
These pages sit beside the service list. They explain generator size, the makes we already publish, and how an onsite visit is booked.
Google reviews of ProService Generator Repairs
Google Review
[ProService Generator Repairs] is a complete end-to-end provider. From complex fresh installations to emergency fault finding and automated refueling, they handle our entire power infrastructure flawlessly and professionally.
Google Review
A true turnkey backup power provider.
Common Questions
Frequently Asked Questions
What generator brands do you repair in Gauteng?
Published pages cover Cummins, Perkins, Caterpillar, Deutz, Volvo, FG Wilson, Kohler, Kipor and Ryobi, among the diesel, petrol and gas brands listed on the brands page. An unlisted model is assessed when the fault and the parts make a visit sensible. Size is read from the data plate.
How quickly can you respond to an emergency callout?
Emergency generator callouts are available across Gauteng. A same-day visit is offered only when a slot is open, and the time is confirmed on the call.
Do you offer maintenance contracts for businesses?
Yes. A plan is a schedule and visit records for a generator that has to stay ready. Intervals follow running hours, calendar time and how the set is used. A breakdown between visits is booked when a slot is open.
Which areas in Gauteng do you cover?
All of Gauteng: Johannesburg, Pretoria, Midrand, Centurion, Sandton, Randburg, Roodepoort, Germiston, Boksburg and surrounding areas.
Can you fix a generator that won't auto-start during loadshedding?
Yes. Auto-start failures are usually a faulty AMF/ATS controller, battery, or fuel issue. Most are resolved on the first visit with parts carried on our vehicles.
More questions? Visit our full FAQ page or call us directly.
Need Generator Service Today?
Emergency or planned, we cover all of Gauteng. Same-day appointments are subject to availability.