What Kind of Service Do You Need?

Repair

Use repair service when the generator:

  • Will not start
  • Starts then shuts down
  • Shows an alarm
  • Runs but does not power the home
  • Fails its exercise cycle

Maintenance

Use maintenance service when the unit works normally but is due for:

  • Oil
  • Filters
  • Spark plugs
  • Battery testing
  • Inspection

Transfer Switch Service

Use ATS/electrical-capable service when:

  • Generator runs but house stays dark
  • ATS does not transfer
  • ATS will not return to utility
  • Partial power occurs

Warranty Service

Use an authorized provider when warranty claim handling or proprietary diagnostics matter.

Start With the Manufacturer Service Network

Factory-authorized providers are more likely to have:

  • Brand-specific training
  • Controller tools
  • OEM parts access
  • Warranty capability

That does not mean the nearest authorized dealer is automatically the best.

It means they belong on the shortlist.

Generator Technician vs Electrician

Generator Technician

Best for:

  • Engine
  • Controller alarms
  • Battery/charger
  • Maintenance
  • Fuel-related symptoms

Electrician

Best for:

  • ATS
  • Output voltage
  • Breakers
  • Service wiring
  • Panel issues

Gas Professional

Best for:

  • Gas pressure
  • Regulator
  • Pipe sizing
  • Fuel leaks

Read generator technician vs electrician →

Questions to Ask Before Booking

Do You Service My Brand?

Give the exact:

  • Brand
  • Model
  • Controller if known

Do You Work on Standby Generators?

Some shops mainly service portable equipment.

Standby systems involve:

  • Automatic transfer switches
  • Fuel gas
  • Utility sensing
  • Control systems

What Does the Diagnostic Fee Include?

Ask whether it covers:

  • Travel
  • Fault-code scan
  • Battery test
  • Startup test
  • Estimate

Do You Service Transfer Switches?

Critical if the generator runs but the home remains dark.

Do You Perform Warranty Work?

Important on newer units.

Do You Offer Emergency Service?

Ask before storm season.

What Information to Give the Service Company

Collect:

  • Brand
  • Model
  • Serial
  • Fuel type
  • Operating hours
  • Error code
  • Exact symptom
  • Whether utility is currently out

Better:

“20kW standby, natural gas, cranks but won’t start, controller shows overcrank.”

Worse:

“My generator is broken.”

What a Good Service Visit Should Include

Depending on the symptom:

  • Read alarm history
  • Check controller
  • Test battery
  • Inspect cables
  • Check oil
  • Verify fuel availability
  • Start generator
  • Check output
  • Inspect ATS

A technician who immediately sells the most expensive part without proving the failure is a red flag.

During an Outage

Storm conditions change service availability.

Some companies prioritize:

  • Existing maintenance customers
  • Medical-priority customers
  • Contract customers

If backup power is critical, establish the relationship before the storm.

Read emergency generator repair →

How Much Does Local Service Cost?

Scheduled repair/service visits commonly land in the low hundreds before parts.

Emergency dispatch, long travel and major parts can increase the total substantially.

Read generator repair cost →

Red Flags

Be cautious if a provider:

  • Cannot identify your brand/controller
  • Will not explain diagnostic fees
  • Recommends replacement before seeing the unit
  • Cannot service the ATS
  • Has no standby experience

Should You Use the Original Installer?

Often, yes, because they know:

  • Installation
  • Fuel system
  • ATS
  • Service history

But you are not locked to them.

A competent manufacturer-experienced provider can generally service equipment installed by someone else.

FAQs

Who repairs whole-house generators?

Generator dealers, specialist technicians and some electrical contractors.

Should I call an electrician or generator technician?

Use a generator technician for engine/controller faults and an electrician for ATS/output/service faults.

Can another dealer service my generator?

Often yes.

Is an authorized dealer required?

Not always, but it is useful for warranty work and brand-specific diagnostics.

Bottom Line

The best local provider is not simply the closest company.

Choose the one that can prove they handle:

your brand + your symptom + your transfer/fuel system + warranty if relevant

Find generator repair service →