01
Won't start
Separate no-crank from crank/no-start, photograph the controller code and confirm basic fuel availability before buying a battery or starter.
Open troubleshooting guideGenerac repair
Generac generator repair starts with the exact fault—not a parts cannon.
Preserve the controller code, identify the model, separate the symptom, and understand whether the job is owner-level troubleshooting, normal maintenance, or authorized warranty/service work.
Direct answer
Who should repair a Generac standby generator?
For warranty concerns, Generac's current support guidance directs owners to an authorized service dealer. Authorized service centers can also handle non-warranty service, parts and diagnosis. Safe owner checks can still be useful—reading the code, checking oil on the proper procedure, verifying propane level or noting battery age—but internal fuel, transfer-switch and line-voltage work should not be turned into a DIY repair from an online guide.
Start with the symptom
Use the fault family to reach the right repair path.
02
Overcrank — Code 1100
Code 1100 means the generator attempted to start but did not start successfully. Basic fuel, battery and maintenance context comes before parts replacement.
Open troubleshooting guide03
RPM Sense Loss
1500-series faults can represent different starting/running conditions. Preserve the exact subcode and use the model-specific diagnostic path.
Open troubleshooting guide04
Low Oil Pressure
Code 1300 calls for an oil-level/leak check after the unit cools; a persistent alarm with correct oil level belongs with service.
Open troubleshooting guide05
Underspeed
1600-series speed faults can involve overload, fuel delivery, airflow, maintenance or other engine/control conditions.
Open troubleshooting guide06
Auxiliary Shutdown
Code 2800 usually means an emergency or auxiliary shutdown switch is open. Check the model-specific switch locations before clearing the alarm.
Open troubleshooting guide07
Won't enter AUTO
Active alarms, activation state, service mode or shutdown-switch conditions can prevent normal automatic readiness.
Open troubleshooting guideBefore calling service
Turn “it doesn't work” into useful diagnostic information.
The more exact information you capture before the technician arrives, the easier it is to distinguish a battery/start issue from a fuel, engine-protection, controller, transfer or maintenance problem.
Generator model and serial number
Exact controller alarm/code and any subcode
What the engine does: no crank, crank/no-start, starts then shuts down, or runs with no house power
Fuel type: natural gas or propane
Approximate battery age and any battery/charger warning
Last maintenance date and current run hours
Whether the failure happened during an outage or weekly exercise
Photos of the controller screen and any visible leak/damage
Warranty reality
“Five-year warranty” does not mean every repair is covered the same way for five years.
The applicable warranty document controls. A published Generac air-cooled five-year limited warranty, for example, distinguishes mileage/labor/parts coverage in earlier years from narrower parts coverage later, requires scheduled maintenance, and places warranty diagnosis/repair with authorized/certified dealers. Promotional warranty offers can have separate eligibility terms.
Finding the right dealer
Select Maintenance & Service for warranty work.
Generac's current dealer-locator guidance specifically tells owners seeking warranty work to choose the Maintenance & Service category. Dealer tiers are not identical: some sellers may not provide the same service depth, while higher service tiers employ factory-trained technicians and maintain more service capability.
DIY boundary
Know where homeowner troubleshooting should stop.
Usually reasonable owner information
Read controller status/code, identify the exact model, check visible oil level/leaks using the manual, confirm LP tank level, inspect for blocked snow/debris.
Service-level diagnosis
Fuel-pressure testing, internal engine/control diagnosis, repeated speed faults, persistent oil-pressure alarms with correct oil level, charger/control faults.
Do not treat as DIY
Energized automatic transfer switch work, utility/service conductors, gas-regulator adjustment, fuel piping, bypassing switches/safeties or defeating automatic-start protections.
Official support routes
Use the manufacturer support path when warranty or certified service matters.
Generac provides both a dealer locator and a service-request workflow that can connect a homeowner with a certified local provider.