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Buyer’s guide

How to Choose a Generator Technician

Choose a generator technician who tests before replacing parts, explains the fault in plain words, and holds the right qualification for the job: a diesel mechanic or plant fitter for the engine, and electrical training for the alternator and controls. Use the checklist below on anyone you call, including us.

Callout fee waived when you accept our written quote. 1-year workmanship guarantee. See prices

  • Qualifications to ask for
  • Signs of good work
  • Written for Gauteng owners
Large dark grey canopy open on a turbocharged diesel engine with Fleetguard filters, controller on a blue door panel

The short answer

What should a good generator technician do?

A good technician starts by listening to what the generator does, then tests the system that matches the symptom. A click points to the battery and starter. A crank with no fire points to fuel. A set that runs with no power points to the alternator, the AVR or the breaker. You should hear which one failed, and why, before any part goes on.

Qualifications matter because a generator is two machines in one. The engine needs a diesel mechanic or diesel plant fitter. The alternator, AVR, controller and changeover need electrical training. Work that changes your fixed wiring needs a registered electrician who can issue a Certificate of Compliance.

A good technician also works safely and leaves a record. They isolate the set before working on it, keep every shutdown connected, and give you a written report of what they found, what they did and what to watch.

DSE generator controller, emergency stop and key switch on a teal canopy, with the breaker box below

On the phone

Questions to ask a generator technician

  • What qualification do you hold?

    Ask directly. A trade-tested diesel mechanic, a diesel plant fitter, an electrician or an engineer will tell you without hesitation.

  • How will you find the fault?

    Listen for a test plan: battery voltage, fuel delivery, controller alarms, output readings. “We’ll swap the part and see” is a guess.

  • Have you worked on this make and size?

    Give the make, model and kVA. Experience with similar sets shortens the diagnosis.

  • Will you show me the old part?

    A confident technician shows you the worn or failed part and explains what went wrong.

  • What do you need from me before you come?

    A good technician asks for your suburb, the fuel, the symptom and a photo of the data plate, so the right parts arrive with them.

  • What should I watch between visits?

    Ask what you can check safely from outside the canopy: the fuel level, warning lights, leaks under the set and the charger lamp.

Qualifications and skills

What a qualified generator technician brings

  • Trade-tested diesel mechanic

    Engine, fuel, cooling and lubrication work on diesel generators.

  • Diesel plant fitter

    Strip-down, repair and rebuild of diesel plant, including large standby sets.

  • Electrical training

    Testing alternators, AVRs and controllers with a meter instead of guesswork.

  • Registered electrician for changeovers

    Changeover switches and ATS wiring into your distribution board, signed off with a Certificate of Compliance (CoC).

  • Controller know-how

    Reading alarms and settings on Deep Sea, ComAp, SmartGen and Datakom modules, and reprogramming them with the maker’s software.

  • Petrol and gas experience

    Carburettors and stale fuel on petrol sets, and regulators and gas supply on gas and dual-fuel sets.

Warning signs

Red flags during a technician’s visit

  • No meter, no test

    A technician who diagnoses an electrical fault without a multimeter is guessing.

  • Bridged shutdowns

    Bridging a low oil pressure, high temperature or overspeed shutdown hides the fault and puts the engine at risk.

  • A hot radiator cap opened

    A hot cooling system is under pressure and can spray scalding coolant. A careful technician waits for it to cool.

  • Parts first, questions later

    A new battery, AVR or controller fitted before any testing often fixes nothing.

  • No report, no explanation

    If you cannot get a clear answer about what failed, you cannot judge the repair.

  • A portable set run indoors

    Generators give off carbon monoxide. A technician should run a portable set outdoors only, with good airflow.

What a technician should leave you with

Ask for these in writing. They show what was done and give you a record for the next visit.

A service report should show

  • The date and the hour meter reading
  • Oil, filters and other parts fitted
  • Battery voltage and the charger condition
  • Alarms read from the controller
  • Output voltage and frequency on the test run
  • Leaks, wear or faults the technician saw
  • What to fix now and what can wait
  • When the next service is due

A written quote should show

  • The fault found and the test that proved it
  • Each part by name, with its price
  • The labour and the callout fee
  • The total and how long the quote is valid
  • The workmanship guarantee period

How to check reviews on Google and HelloPeter

  • Search the company name and read recent reviews in full
  • Look for comments on punctuality and clear explanations
  • Check whether customers say the fix lasted
  • Read how complaints were handled and resolved
  • Be wary of many short reviews posted within a few days of each other

Our answers

How our lead technician measures up

Ask us the same questions. Here are our answers.

  • Charlie, lead technician

    Degree in Mechanical Engineering, Degree in Electrical Engineering and Diesel Plant Fitter.

  • Engine and electrics

    We diagnose engines, alternators, AVRs, controllers and changeovers on the same visit.

  • Test before parts

    We replace a part only when a test proves it failed, and we explain what the test showed.

  • Protections stay connected

    We find the cause of a shutdown instead of bridging it.

  • Written quote first

    The quote is free, and the diagnosis is included when you go ahead.

  • Since 2000

    26 years of generator work, with a 1-year workmanship guarantee.

Common Questions

Questions about choosing a generator technician

How do I choose a generator technician?

Choose one who tests before replacing parts, explains the fault in plain words, and holds the right qualification: a diesel mechanic or diesel plant fitter for engine work and electrical training for the alternator and controls.

What qualifications should a generator technician have?

For diesel engines, a trade-tested diesel mechanic or diesel plant fitter. For alternators, AVRs and controllers, electrical training. For changeover or ATS wiring, a registered electrician who can issue a Certificate of Compliance.

What should a technician check first on a no-start?

The battery, the fuel and the controller alarm. All three are quick to test, and ruling them in or out comes before anyone condemns the starter or the injectors.

What should a service report include?

The date and running hours, the work done and parts fitted, battery and charger readings, any controller alarms, output voltage and frequency on the test run, faults found, and when the next service is due.

What are the warning signs of a poor technician?

Parts fitted before any testing, bridged shutdowns, no written quote or report, and no clear answer about what failed.

How do I check a technician’s reviews?

Search the company on Google and HelloPeter and read recent reviews in full. Look for comments on punctuality, clear explanations and whether the fix lasted.

Who is ProService’s lead technician?

Charlie leads our technical work and holds a Degree in Mechanical Engineering, a Degree in Electrical Engineering and a Diesel Plant Fitter qualification.

Where can I read reviews of ProService Generator Repairs?

On our Google Business Profile, where each review shows the reviewer and the date.

Still unsure what the fault is? Call or WhatsApp 082 057 4605 for onsite diagnosis.

Service Areas

Onsite visits across Gauteng

We come to your generator anywhere in Gauteng, 24/7. Choose your region for local suburbs, call-out details and the faults we see most there.

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 Visit

Ask about our technician

Call or WhatsApp 082 057 4605, or send the form with your suburb and the fault. We answer every question on the checklist.

Photos of the generator and the data plate can be sent on WhatsApp.

Add your email (optional)
  • Free written quote before any work starts
  • Callout fee waived when you accept the quote
  • 1-year workmanship guarantee

We use your details only to reply to this enquiry and never sell or share them for marketing. Privacy policy

What happens next

  1. We reply with questions about the generator, or to book a visit.
  2. A technician comes to you. For a breakdown we arrive within 1 hour.
  3. 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.