December 17, 2025
Leander, TX Standby Generator Installation & Maintenance — Why Your Generac Won't Start
Estimated Read Time: 12 minutes
Generac generator won't start right when the lights go out? You are not alone in Central Texas. Between spring storms and grid alerts, standby power matters. This guide shows 10 common causes and the exact fixes homeowners can try before calling in a pro. If you prefer, our licensed electricians can handle diagnostics, maintenance, and repairs for you.
Safety First and Quick Checks Before You Troubleshoot
A standby generator is tied into your home’s electrical system, so start with safe basics. If anything seems off, stop and call a licensed electrician.
- Verify the automatic transfer switch is in Auto.
- Check the generator’s main breaker and the home’s panel breakers.
- Confirm the unit is not in an alarm or lockout state.
- Review the last run time or alerts in your Generac app if your model has Wi‑Fi monitoring.
Note: Optional standby systems are governed by NEC Article 702, so repairs and wiring should be handled by qualified professionals. SALT’s residential electricians install and service Generac units across Greater Austin.
Fuel and Air Issues That Prevent Starting
When a Generac will not start, air and fuel delivery are top suspects. These are often simple fixes.
1) Low or empty fuel supply
- Natural gas: Make sure the gas valve is open. Ask your gas utility if there has been a pressure drop.
- Propane: Check the tank gauge. Below 20 percent can cause start failures.
- Diesel: Inspect tank level and age of fuel. Fix: Restore fuel, open valves, and reattempt a start. If the system still fails, have a pro check fuel pressure and regulators.
2) Clogged air filter
Dirty filters choke airflow and cause hard starting or stalling. Fix: Replace the air filter. SALT’s maintenance includes replacing air filters and confirming proper airflow during a function check.
3) Old or contaminated fuel (propane or diesel only)
Stale diesel and contaminated propane can prevent ignition. Fix: For diesel, drain and refill with fresh fuel. For propane, have your supplier test and refill. Schedule a pro to inspect injectors or carburation if problems persist.
Battery, Charger, and Starter Problems
Cold snaps, heat, and age all impact batteries and starter components.
4) Weak or dead starting battery
A low battery is one of the most common reasons a generator will not crank. Fix: Test voltage and connections. Clean corrosion. Replace the battery if it fails a load test. SALT checks batteries during yearly maintenance to prevent surprise failures.
5) Battery charger or trickle charge not working
If the charger loses power or fails, the battery slowly dies. Fix: Ensure the charger has power and the outlet or circuit is on. Verify fuses. If the charger is faulty, replace it and test the charging circuit.
6) Starter motor, solenoid, or brushes worn
Wear can prevent the engine from turning over. Internal brushes are subject to friction and require periodic replacement. Fix: If you hear clicking or grinding, stop and schedule service. Our electricians can replace worn brushes and starter components safely.
Controls, Sensors, and Settings That Block a Start
Modern standby units will not start if sensors detect a condition that could damage the engine.
7) Low oil level or overdue oil change
Low oil or degraded oil triggers protection modes that prevent starting. Fix: Check and top off to the correct level. Replace oil and oil filter if overdue. SALT’s preventive service replaces oil and filters and resets reminders.
8) Fault codes, alarms, and wrong selector settings
If the unit is in Off or Manual, it may not respond to an outage. Fault codes block starts until cleared. Fix: Set the selector to Auto. Review the control panel or app for codes. Clear minor alerts and reattempt a start. Persistent codes require diagnostics.
9) Spark plug wear or ignition faults
Fouled plugs or damaged ignition leads cause no‑start conditions. Fix: Inspect and replace spark plugs as needed. Check plug gaps and wire connections. SALT’s maintenance plan includes plug inspection and replacement when needed.
Installation or Maintenance Gaps That Show Up on Start Day
If you just installed a generator or it has not been maintained, a few issues are common.
10) Incorrect sizing, fuel pressure, or lack of routine maintenance
Units that are undersized or starved for fuel pressure struggle to start and run large loads. Skipping yearly maintenance lets small issues turn into failures. Fix: Have a licensed electrician confirm sizing, fuel type, and gas regulator settings. Schedule annual maintenance. SALT simulates outages, conducts function checks, replaces filters, inspects spark plugs, checks wiring, and verifies fuel levels.
Step‑by‑Step: How To Manually Start and Verify Operation
Use this simple sequence to confirm that your Generac is ready when the power drops.
- Put the generator control to Auto, then attempt a Manual start to confirm it cranks and runs.
- Check that the generator main breaker is on.
- Simulate a power outage to test transfer. SALT performs this test during maintenance.
- Let it run for a few minutes. Listen for smooth idle and watch for warnings.
- Return the system to Auto and confirm your weekly exercise schedule is enabled.
If it still will not start, record the model, serial number, and any codes. Call a licensed electrician for diagnostics.
When To DIY vs Call a Pro
Try homeowner checks if you are comfortable with basic tasks:
- Visual inspection for damage or loose wires
- Checking fuel, oil, and air filter
- Battery voltage check and simple replacements
- Reviewing alarms and selector settings
Call a professional when you see:
- Fuel leaks, gas odor, or regulator issues
- Fault codes that recur after reset
- Starter grinding, repeated clicking, or no crank
- Wiring, transfer switch, or underground conduit concerns
SALT’s trained electricians keep manufacturer warranties valid on Generac installs. We wire directly into your panel with buried conductors, place units on a concrete pad, and confirm correct fuel selection and sizing.
Why Preventive Maintenance Pays Off in Austin
Central Texas weather and grid stress create real outage risk. Consumer Reports notes whole‑home generators can increase home value by 3 to 5 percent. SALT recommends annual maintenance so your investment performs when it is needed. Our visit includes a function check, simulated outage, oil and air filter replacement, spark plug inspection or replacement, wiring checks, and fuel level verification. We also offer Generac‑specific maintenance with the same core steps.
Bonus value: Many customers may qualify for tax deductions through the CARE Act. Ask our team to coordinate with your tax professional. Generac models with Wi‑Fi monitoring let you see status and alerts from your phone, which helps you act before a start failure happens.
Pro Installation Details That Improve Reliability
Good installs start easier and run smoother. Here is how SALT sets your system up for success:
- Concrete pad placement near your home for stability and service access
- Buried wiring to protect conductors and curb weather exposure
- Correct gas sizing and regulator settings for natural gas or propane
- Consultation on capacity for large appliances, including AC on larger models
- Commissioning that tests auto start, transfer timing, and load handling
Our process typically takes a couple of days to allow for pad installation and proper commissioning. A trained residential electrician completes the work so the 10‑year Generac warranty we provide remains valid.
Maintenance Cadence and Homeowner Checklist
Follow this simple annual rhythm and monthly glance to avoid surprise no‑starts.
Annual by a professional:
- Function check and simulated outage
- Replace air and oil filters, check and replace oil
- Inspect and replace spark plugs if needed
- Check and secure all wiring and connections
- Verify fuel levels and, for gas systems, confirm regulator performance
Monthly by homeowner:
- Visual inspection for damage or debris
- Confirm exercise schedule ran
- Listen for unusual sounds during exercise
- Review app alerts if Wi‑Fi equipped
Signs Your Generator Is Ready for the Next Outage
- Starts on command in Manual and returns to Auto
- Passes a simulated outage with clean transfer
- No active alarms or fault codes
- Battery holds charge and charger shows normal status
- Oil level and filters are fresh and clean
If any box stays unchecked, schedule service before storm season or predicted grid events. Austin summers and spring storms do not give much notice.
Why Homeowners Choose SALT for Generac Service
- Licensed electricians trained on Generac systems
- Same day service in Austin, Round Rock, Georgetown, Cedar Park, Leander, and more
- SALT+ membership for priority scheduling, exclusive discounts, and routine checks
- Lifetime workmanship guarantee
- Local team that understands Central Texas fuel and permitting needs
From first consultation on fuel selection to yearly spark plug and filter replacements, we make standby power simple.
Special Offers for Central Texas Homeowners
- Save $650 on a new Generac home generator. Mention the $650 Generac offer when you call. Expires 2025-12-31.
- SALT+ members receive 5 percent off new generator equipment installations. Membership must be active at scheduling and invoicing. Expires 2025-12-31.
- No money down with 0 percent financing up to 12 months for qualified buyers. Ask about longer promotional options.
Call (512) 559-4206 or visit https://callsalt.com/ to schedule and redeem your offer.
What Homeowners Are Saying
"SALT installed a generator in my backyard. They were thorough, knowledgeable and explained each step of the process... I enrolled in the SALT+ program... Great experience!"
–Brooklyn G., Generator Installation
"Michael took care of my generator yearly maintenance efficiently while answering all my questions and providing a customer-oriented experience."
–A. A., Generator Maintenance
"When our went off today, the generator they installed kicked on and saved the day for our medically fragile children!"
–Marta W., Generator Installation
"I had a Generac generator installed... Today I had a question about the transfer switch, and Michael called me right away... Truly A+ work and service."
–Russell N., Generator Support
Frequently Asked Questions
Why does my Generac click but not start?
A weak battery or bad starter solenoid is common. Check battery voltage, charger power, and cable connections. If it still only clicks, schedule professional diagnostics to test the starter circuit and replace worn components like brushes or the solenoid.
How often should I service my standby generator?
Once per year for best results. A proper visit includes a function check, simulated outage, oil and air filter replacement, spark plug inspection and replacement if needed, wiring checks, and fuel level verification.
Can my standby generator run my air conditioner?
Yes, if sized appropriately. Larger models can power central AC. Have a licensed electrician confirm capacity, starting amperage, and transfer setup so essential loads are covered without overloads.
What does NEC Article 702 mean for my home?
NEC 702 covers optional standby systems. It sets rules for safe transfer equipment, wiring, and capacity planning. Use licensed electricians so your installation meets code and avoids dangerous backfeed or overloads.
Will DIY maintenance affect my warranty?
Basic checks are fine, but improper repairs or installations can jeopardize warranty coverage. SALT installs and services Generac units with trained electricians to help keep the 10‑year warranty we provide valid.
The Bottom Line
If your Generac generator will not start, begin with fuel, air, battery, and settings. Most issues trace to simple checks you can do in minutes. For persistent faults, call SALT for code‑compliant diagnostics and maintenance. Need installation, repair, or annual service in Austin or nearby? We are ready.
Call (512) 559-4206 or schedule at https://callsalt.com/. Mention the $650 Generac offer before 2025-12-31 to save on a new system.
Ready for Reliable Standby Power?
- Schedule service or a free installation quote: (512) 559-4206
- Book online: https://callsalt.com/
- Active coupon: Save $650 on a new Generac home generator. Mention the $650 Generac offer. Expires 2025-12-31.
Power your home with confidence across Austin, Round Rock, Georgetown, Cedar Park, Leander, Pflugerville, Kyle, Hutto, Del Valle, and Belton.
About SALT Plumbing, Air & Electric
Family owned and serving Austin since 1984, SALT delivers licensed electrical, plumbing, HVAC, and whole‑home generator services. We install and maintain Generac systems the right way to help keep your warranty valid. Same day service, lifetime workmanship guarantee, and SALT+ membership benefits give homeowners priority scheduling, discounts, and regular maintenance checks. Voted Best in Austin and trusted across Central Texas.