Generator Repairs · Gauteng
Generator Repairs Across Gauteng
Generator won’t start, cutting out or not producing power? We repair petrol, diesel, standby, commercial and industrial generators on site in Johannesburg, Pretoria and across Gauteng, from small portables to large three-phase diesel sets. We are open 24/7, arrive within 1 hour for breakdowns and quote in writing before any work starts.
Specialist visits are booked as diesel generator repairs, petrol generator repairs, commercial generator repairs or industrial generator repairs. Diagnosis starts with generator fault finding, and the visit itself is arranged through generator callouts.
The Service
Onsite generator repairs that fix the real fault
When a generator fails, you need it diagnosed properly and running again, not a parts-swapping exercise. Our technicians come to you anywhere in Gauteng, find the real cause of the fault and repair it on site. Whether it will not start, starts and then cuts out, runs with no power, overheats, leaks or shows a controller alarm, the visit starts with testing.
Most generator faults sit in a handful of systems: batteries and starting, fuel delivery, battery charging, the control panel or ATS, voltage regulation (AVR), alternator output, cooling, and oil leaks or mechanical wear. Each one is tested before anything is replaced, which keeps the repair bill to the work the generator actually needs.
We repair generators of every size, from portable petrol units at home to commercial standby sets and large industrial diesel plant. Brands we work on regularly include Cummins, Perkins, Caterpillar, FG Wilson, Deutz, Volvo, John Deere, Generac, Kohler and Honda.
Every repair starts with diagnosis and a written quote. We explain what failed and why, what we recommend and what it will cost, and nothing is done until you approve it. After the repair the generator is started and tested before we leave, and our workmanship is guaranteed for 1 year.
Generator not working?
Call or WhatsApp 082 057 4605 for onsite diagnosis across Gauteng.
Common Faults
What generator faults do you repair?
Starting and batteries
No crank, click-then-silence, or a failed auto-start. See Generator Not Starting for the fault-first walkthrough.
Fuel delivery
Empty, stale or contaminated fuel, blocked filters, lift pumps and injectors. Diesel detail is on Fuel System Repairs.
Charging and batteries
A battery that goes flat between outages often points at the charger or terminals, not only the battery itself.
Control panels
AMF/ATS alarms, start failure, shutdowns and sensor faults. Dedicated work is on Control Panel Repairs.
Voltage and AVR
No output, low voltage or hunting voltage while the engine runs. See AVR Repairs and Not Producing Power.
Alternator output
Breakers, excitation and winding tests come after we prove the AVR is not the cause. Rewinding is a separate job.
Overheating and cooling
High-temperature shutdowns, radiators, coolant and canopy airflow. See Generator Overheating.
Oil, leaks and mechanical
Oil leaks, belts, bearings, couplings and unusual noise — inspected onsite before any strip-down.
Electrical faults
Output breakers, changeover contacts and wiring faults that look like a “dead generator” while the engine is healthy.
Who We Support
Generator repairs for homes, businesses and industry
Homes and estates
Portable petrol units and residential standby generators repaired at your home, so you are ready for the next power cut.
Offices and retail
Standby sets for office parks, shops, restaurants and complexes, including automatic start and ATS faults.
Body corporates and complexes
Shared standby generators for sectional-title schemes and estates, with access arranged through the managing agent or caretaker.
Industrial sites
Large three-phase diesel sets in factories, warehouses and plants, with the visit planned around production and access.
Repair Process
How a generator repair works
- 01
Send your location and generator details
Call, WhatsApp or use the form. Give the suburb in Gauteng, the make, model and kVA if you know them, the fuel type, and what the generator is doing or which alarm it shows. A photo of the data plate on WhatsApp helps.
- 02
We review the enquiry
The details are checked to decide whether the problem needs a site visit, what kind of visit it is, and whether parts may be needed.
- 03
A technician comes to you
Open 24 hours a day, 7 days a week, including weekends and public holidays. For breakdowns and emergencies we arrive within 1 hour. Servicing and maintenance visits are booked for a time that suits you.
- 04
Charges are explained first
The callout fee is R400 – R700 in business hours and R700 – R1,400 after hours. The callout fee is only payable if the customer does not accept the quotation. If the quotation is accepted, the callout fee is waived. The written quote is free, and the diagnosis is included at no extra charge when you go ahead with the repair.
- 05
Diagnosis, then a quote
The generator is inspected and the fault is tested on site. A written quote is given before work starts and is valid for 14 days. If more work is found once the job is under way, it is explained and not done without your approval.
- 06
Work follows the accepted quote
Repairs or servicing go ahead on the scope you accept. Payment is due on completion unless a credit account or another arrangement is agreed in writing. EFT bank transfer and cash are accepted.
Why Choose Us
Why choose ProService for generator repairs
01
We find the cause first
Systematic testing finds the real fault before parts are ordered, so you do not pay for parts the generator did not need.
02
Written quote before work
You see the findings and the price before we start. Quotes are valid for 14 days, and you pay once the approved work is done.
03
Small and large generators
From small petrol portables to large diesel standby and industrial sets, including supported gas units.
04
1-year workmanship guarantee
If a fault related to our repair returns within 1 year, we come back to inspect and fix it at no extra labour charge.
Brands We Service
- Cummins
- Perkins
- Caterpillar
- Deutz
- Volvo Penta
- John Deere
- Generac
- Kohler
- FG Wilson
- Olympian
- SDMO
- Mahindra
- Yuchai
- Hatz
- Stamford
- Deep Sea
Common Questions
Generator repair questions
What generator faults do you repair?
Generators that will not start, start then stop, run with no power or low voltage, overheat, trip under load, leak oil or fuel, smoke, or show a controller alarm. We cover the engine, fuel system, batteries and charging, control panels, ATS, AVR and alternator.
How much does a generator repair cost?
Starting faults typically cost R600 – R3,500, fuel pump work R1,800 – R4,500 and AVR replacement R2,200 – R9,000. A standard business-hours callout is typically R400 – R700, and it is waived if you accept the quote. You always get a written quote first. See the repair cost guide for more ranges.
Do you repair generators on site?
Yes. Every diagnosis, repair and engine overhaul is carried out at your premises anywhere in Gauteng, so the generator never has to be transported.
How quickly can you come out?
We are open 24 hours a day, 7 days a week, including public holidays, and we arrive within 1 hour for breakdowns anywhere in Gauteng. Call or WhatsApp 082 057 4605 with your suburb and the fault.
Which generator brands do you repair?
Most diesel, petrol and gas brands, including Cummins, Perkins, Caterpillar, FG Wilson, Deutz, Volvo Penta, Generac, Kohler, Mahindra, Yuchai, Hatz, Honda, Ryobi, Mac Afric, Gentech and Kipor, plus Stamford alternators and Deep Sea controllers. Send a photo of the data plate and we will confirm before the visit.
Is it worth repairing an old generator?
Usually, if the engine and alternator are sound. Starting, fuel, AVR and controller faults are normally cheaper to fix than replacing the set. If a major engine or alternator repair would cost more than the generator is worth, we tell you so you can compare.
Do you guarantee your repairs?
Yes. Workmanship is guaranteed for 1 year from completion. If a fault related to our work comes back in that time, we return to inspect and fix it at no extra labour charge. Parts carry the supplier’s warranty where one applies.
What should I tell you when I book?
Your suburb, the make and model, the kVA, diesel or petrol, and what it is doing: no crank, cranks but will not fire, runs with no power, or an alarm code. A WhatsApp photo of the data plate and controller screen helps us bring the right parts.
Still unsure what the fault is? Call or WhatsApp 082 057 4605 for onsite diagnosis.
Related Services
Other generator services
- Generator Fault Finding Diagnose the cause before parts are changed
- Generator Guides Practical background on servicing and ratings
- Repair or Replace Comparing a quote with another set
- Engine Overhauls Major mechanical repairs on site
- Commercial Generator Repairs Offices, retail and complexes
- Industrial Generator Repairs Larger diesel and heavy standby
- Repairs Near Me Onsite repairs across Gauteng
- Emergency Callouts Urgent breakdown assistance
- Generator Servicing Scheduled individual service
- Diesel Generator Repairs Standby and commercial diesels
- Control Panel Repairs AMF / ATS controllers
- AVR Repairs Voltage and output regulation
- Fuel System Repairs Filters, pumps and injectors
- Generator Not Starting Will not start, even in manual
- Not Producing Power Engine runs, no voltage
- Petrol Generator Repairs Home and portable petrol sets
- Gas Generator Repairs LPG and natural-gas standby
- Generator Callouts How a site visit is booked
- ATS Repairs Automatic transfer faults
- Alternator Repairs No output once the engine runs
- Changeover Switches Manual changeovers and the CoC
- Starter Motor Repairs Clicks, slow cranking or no crank
- Battery and Charging Batteries and chargers on standby sets
- Cooling System Repairs Radiator, pump and hoses
Common Problems
Faults diagnosed on a repair visit
- Cranks But Won't Start Turns over, will not fire
- Generator Overheating Temperature shutdowns
- Starts Then Stops Runs, then shuts down
- Trips Under Load Fails once the building is connected
- Low Voltage Output is present but too low
- Unstable Voltage Voltage that will not settle
- Low Frequency Hz follows engine speed
Service Areas
Generator repairs across Gauteng
Our technicians travel to you across Gauteng, including Johannesburg, Pretoria, Sandton, Midrand, Centurion, Randburg, Roodepoort, Kempton Park, Boksburg, Benoni, Germiston, Alberton and Fourways. Choose your area for local details.
What to send before we attend
These details help us plan the visit and bring the right parts. Send what you can on WhatsApp; if you can’t find the model number, we still book the visit.
- Location
- The suburb or site, so the visit can be booked in the right area.
- Make and model
- The generator brand and model, if they are known.
- kVA
- The size printed on the data plate.
- Fuel type
- Diesel, petrol, LPG, natural gas, or dual-fuel.
- Controller model
- The module name on the panel, when it is visible.
- Fault or alarm
- What the set does, and any text on the screen.
- Photos
- The generator, the data plate, and the controller or alarm. Send these on WhatsApp.
Book a Repair
Generator Not Running?
Call or WhatsApp 082 057 4605, or send the form, for onsite diagnosis anywhere in Gauteng. We are open 24/7 and arrive within 1 hour for breakdowns.
- Call
- 082 057 4605
- Message us on WhatsApp
What happens next
- We reply with questions about the generator, or to book a visit.
- A technician comes to you. For a breakdown we arrive within 1 hour.
- The fault is diagnosed on site and you get a written quote. No work starts until you accept it.
Charlie, lead technician: Degree in Mechanical Engineering, Degree in Electrical Engineering, Diesel Plant Fitter. Generator specialists since 2000.