Manchaca Standby Generator Installation & Maintenance Tips

Estimated Read Time: 10 minutes

Power out and your standby generator won't start? That empty hum is more than annoying in Austin heat or during spring storms. Below are the seven most common causes, quick checks you can do safely, and when to call a licensed electrician. If you’re facing an outage right now, scan the list, try the safe steps, and then book same‑day service. SALT installs, repairs, and maintains Generac and other whole‑home units across Greater Austin.

1) Dead or weak battery

Your generator’s starting battery takes a beating in Texas heat. Long idle periods drain capacity, and a weak battery will crank slowly or not at all.

What to check now

1. Inspect the battery terminals for corrosion. Clean with a baking soda and water mix, then dry and tighten.
2. Verify the battery breaker is on and any battery switch is set to ON.
3. Check the date code. Many OEM batteries last 2–4 years in our climate.

When to call a pro

• If voltage is below spec or it fails a load test, schedule a replacement. A licensed electrician will also check charging output from the generator’s charger.

Pro tip

• SALT includes battery testing during annual maintenance. We recommend one service visit per year before peak storm season so you aren’t gambling during May thunderstorms.

2) Low oil, wrong oil, or overdue oil change

Standby engines include low‑oil sensors that prevent starting to protect the motor. Thick, old oil or the wrong viscosity can also trigger no‑start behavior.

What to check now

1. Use the dipstick on a level surface. Top off with the manufacturer‑approved oil if low.
2. Verify you’re using the correct grade for Central Texas temperatures.
3. Look for leaks around the filter and drain plug.

When to call a pro

• If the oil is black, gritty, or smells like fuel, book service. A tech will replace oil and filters, reset maintenance reminders, and clear any lockouts.

Pro fact

• During SALT’s preventative maintenance we replace air and oil filters, check and replace oil, and simulate a power outage to verify performance.

3) Fuel supply closed, empty, or restricted

No fuel, no start. Propane valves, natural gas regulators, or diesel levels can all be culprits.

What to check now

1. For propane: Confirm tank level and that the service valve is fully open.
2. For natural gas: Make sure the gas cock is open and that other gas appliances are functioning.
3. For diesel: Verify fuel level and look for algae or water contamination signs.
4. Listen for the fuel solenoid click during start.

When to call a pro

• If you suspect a regulator issue, line blockage, or you smell gas, stop and call a licensed electrician or your gas provider. We’ll pressure‑test, inspect the regulator, and confirm proper BTU flow during load.

Local insight

• In Greater Austin, long hot spells can stress gas supply during peak demand. An undersized regulator or partially closed valve may not show up until your generator starts under load.

4) Tripped breaker, fault code, or safety lockout

Your unit protects itself by locking out after faults like overcrank, overheat, or overspeed. A tripped breaker will also make it seem like the generator failed even if it’s running.

What to check now

1. Review the display for active fault codes. Note them before clearing.
2. Check the generator’s main breaker and all branch breakers in the service panel.
3. Confirm the unit is in AUTO mode, not OFF.

When to call a pro

• If the fault returns after a reset, you need diagnostics. SALT’s techs pull history, test sensors, verify governor and alternator readings, and correct the root cause so the fault does not return under load.

Pro tip

• Many Generac models include Wi‑Fi remote monitoring. We can set alerts to your phone so you catch issues before a storm.

5) Air, spark, or ignition problems

Engines need clean air and a strong spark. Clogged air filters, worn plugs, or damaged leads will keep the engine from firing.

What to check now

1. Inspect the air filter. If it’s caked with dust or soot, replace it.
2. Verify the spark plug boot is fully seated. Look for cracks in the insulator.
3. If you saw a recent lightning event, be alert to possible ignition control damage.

When to call a pro

• Leave plug replacement and gap setting to a technician if you are not comfortable. During service we replace spark plugs when needed and check ignition coil performance.

Maintenance payoff

• Clean filters and healthy plugs improve starting and reduce fuel use, especially helpful during extended ERCOT conservation calls.

6) Transfer switch or control board issues

If the automatic transfer switch (ATS) or control board malfunctions, the unit may not start or it may start but fail to power the home.

What to check now

1. Verify the generator is set to AUTO and the ATS is not in bypass or OFF.
2. If the home lost power but lights never transferred, the ATS may need service.
3. Check for moisture intrusion around the switch enclosure after heavy rain.

When to call a pro

• ATS work is not DIY. SALT’s licensed electricians test coil voltage, time delays, and contactor wear, then perform safe, code‑compliant repairs. We also confirm panel labeling and bonding.

Real‑world timing

• If you are installing a new system, allow a couple of days at minimum. The generator pad must cure before we set the unit and complete permanent wiring to your electrical panel.

7) Worn internal components and neglected maintenance

Even quality standby units have wear parts. Carbon brushes inside the alternator wear with runtime. Loose wiring, tired belts, or cracked boots lead to intermittent or failed starts.

What to check now

1. Review your last service date. If it’s been over 12 months, schedule maintenance.
2. Listen for odd noises during crank attempts. Rattles or squeals indicate deeper issues.
3. Look for frayed wiring or evidence of rodents around the enclosure.

When to call a pro

• We inspect for worn brushes and replace parts before they strand you. SALT’s annual service covers a function check, wiring torque, filter and oil changes, spark plug replacement if needed, and a simulated outage test so you know it transfers cleanly.

Why pro maintenance matters

• Manufacturer warranties and long life depend on correct installation and care. Professional installation by trained electricians keeps the 10‑year Generac warranty valid, and annual maintenance before storm season keeps your system ready.

Quick readiness checklist for Austin homeowners

Use this 5‑minute check before spring storms or late‑summer thunderstorms:

1. Verify AUTO mode is selected and no fault codes are active.
2. Confirm fuel levels and that fuel valves are open.
3. Check battery terminals for corrosion and tightness.
4. Inspect air filter and enclosure for debris, nests, or standing water nearby.
5. Run a brief exercise test if safe to do so.

If anything looks off, schedule a same‑day inspection. A tuned generator protects comfort, food, medications, and home offices when the grid blinks.

When to DIY vs call SALT

DIY steps are limited to visual checks, filter changes, and reading the display. Call a licensed electrician when you see repeated fault codes, fuel or gas issues, ATS problems, wiring concerns, or if the unit has not been serviced in a year.

Why choose SALT in Greater Austin

• Family owned since 1984 with local storm and code expertise.
• Whole‑home generator install, repair, and maintenance for Generac and more.
• SALT+ members get priority scheduling, member pricing, and a lifetime guarantee on repairs and installations.
• Many Generac models support Wi‑Fi monitoring so you get alerts before the weather turns.
• According to Consumer Reports, standby generators can increase home value by 3% to 5%, and some properties may qualify for CARE Act tax deductions. Always consult your tax advisor.

Special Offers for Austin Homeowners

• Special Offer: Save $650 on a new Generac generator sold and installed by SALT. Offer ends 2026-02-04.
• SALT+ Members: Get 5% off new generator equipment and installation. Active membership required. Offer ends 2026-02-04.
• Financing: 0% interest for up to 18 months on eligible generator installations for qualified applicants. Offer ends 2026-02-04.

Call (512) 559-4206 or visit https://callsalt.com/ to schedule and mention the Generac promotion before it expires.

What Homeowners Are Saying

"Michael took care of my generator yearly maintenance efficiently while answering all my questions and providing a customer-oriented experience." –A. A., Generator Maintenance

"I had a Generac generator installed back in November, and the whole team has been great from beginning to end. Today I had a question about the transfer switch, and Michael called me right away and talked me through it like I was the only client who mattered at that moment. Truly A+ work and service." –Russell N., Generac Installation

"When our went off today, the generator they installed kicked on and saved the day for our medically fragile children!" –Marta W., Standby Generator

"Very professional, completed the job I needed done in a timely manner! ... Michael Pena did a great job explaining to me when oil change is required on my backup generator. Completed the oil change and retest of my generator proficiently." –Charlie S., Generator Maintenance

Frequently Asked Questions

How often should I service my standby generator?

We recommend annual maintenance before peak storm season. This includes oil and filter changes, a function check, wiring torque, and a simulated outage test.

Can I clear a fault code and keep using the generator?

You can try a single reset after noting the code. If it returns, stop and schedule service. Repeated resets ignore a real issue and can cause damage.

Why does my generator start but not power the house?

The automatic transfer switch may be the problem. If the ATS fails or is set incorrectly, power will not transfer. This requires a licensed electrician.

Should I run my generator during ERCOT conservation alerts?

Yes, if safe and maintained. Verify no fault codes, correct oil level, and adequate fuel. Follow manufacturer limits and never overload circuits.

Will professional installation affect my warranty?

Yes. Generac’s 10‑year warranty requires professional installation by trained electricians. DIY or unlicensed work can void coverage.

Conclusion

If your standby generator won't start, it is usually one of seven issues: battery, oil, fuel, breakers and faults, air or spark, ATS or controls, or worn parts and missed maintenance. Tackle the safe checks above, then let our licensed Austin electricians handle the rest.

Call or Schedule Now

Call SALT at (512) 559-4206 or book at https://callsalt.com/. Mention the $650 Generac installation offer before 2026-02-04. Need help today in Austin, Round Rock, or Georgetown? Get same‑day service and keep your home powered.

Call now: (512) 559-4206 • Book online: https://callsalt.com/ • Mention the $650 Generac promo before 2026-02-04 to save on your new standby generator.

About SALT Plumbing Air & Electric

Family owned and serving Austin since 1984, SALT provides licensed, trained electricians for whole‑home generators, electrical, HVAC, and plumbing. We offer same‑day service, upfront pricing, and a lifetime guarantee on repairs and installations for SALT+ members. Recognized as a local favorite, we size, install, and maintain Generac and other standby systems, including Wi‑Fi monitoring and professional ATS integration. Get trusted, code‑compliant work that protects your investment and keeps your home powered through Texas storms.