A generator problem found after the power goes out is harder to diagnose and more dangerous to work around than one found on a clear day. During Winter Storm Uri in February 2021, more than 4.5 million Texans lost power after ERCOT ordered 20,000 MW of rolling blackouts. Some outages lasted up to four days.
That history makes generator preparation an essential part of getting ready for a Texas freeze. Before a warning is issued, check the starting capability, fuel supply, airflow, and electrical connection that backup power depends on.
Prepare Before a Freeze Warning Arrives
A generator that started during its last exercise isn’t necessarily ready for a winter outage. Freezing temperatures place more demand on the starting battery, while an extended outage tests the fuel supply, controls, and connection between the generator and the circuits you intend to power.
Start early enough to correct problems before severe weather creates demand for parts and service. Review the owner’s manual for the maintenance tasks approved for your model, note the recommended service interval, and make sure the unit is accessible. Keep leaves, stored items, and other obstructions away from an outdoor generator enclosure.
- Confirm that the generator has a clear path for ventilation.
- Identify the fuel source and make sure the supply is adequate for a potentially extended outage.
- Check that the home’s transfer switch and selected backup circuits are ready for use.
- The maintenance scheduling page is available when a generator has missed its annual service or displayed a warning message.
For most homeowners, annual service is the baseline. A unit that runs often or supports a high-demand setting may need more frequent attention under its maintenance requirements.
Keep Portable Generator Safety Separate from Standby Readiness
Don’t plug a portable generator into a household wall outlet to power the home. This practice, called backfeeding, can energize utility lines and create a serious shock hazard for utility workers, neighbors, and people in the home.
Austin Energy requires a transfer switch when a portable generator is connected to existing home wiring. The switch isolates generator power from utility power so both sources can’t energize the home’s electrical system at once. Its installation requires an electrical permit obtained by a Registered Licensed Electrical Contractor.
Portable generators also create a carbon monoxide risk. This colorless, odorless gas is produced by fuel-burning engines and can build to lethal levels in enclosed or partly enclosed areas.
- Run a portable generator outdoors, at least 20 feet from the home.
- Point its exhaust away from windows, doors, and vents.
- Don’t run it in a garage, basement, crawlspace, shed, carport, or other enclosed space, even with doors or windows open.
- Maintain carbon monoxide alarms with battery backup on every level of the home and outside sleeping areas.
A standby generator is permanently installed and connected through approved transfer equipment. Its readiness work focuses on the battery, fuel system, enclosure, exhaust, controls, and performance under load, not extension cords or unsafe outlet connections.
Complete the Pre-Freeze Generator Checklist
Focus first on the components that affect starting in low temperatures. Homeowner checks are useful, but they don’t replace the manufacturer’s instructions or qualified electrical service.
Check the Battery
Low temperatures reduce generator battery output. Look for corrosion or loose terminal connections, and have the battery checked with a voltmeter and load-tested when possible. A load test places demand on the battery to reveal whether it can provide enough power to start the engine.
Review Fuel & Oil
For a natural gas or propane generator, confirm that the fuel source can support an extended outage before freezing weather arrives. Check the oil level only as directed in the owner’s manual. Oil type and viscosity must match the manufacturer’s guidance for the expected temperature range.
Clear the Enclosure
Remove leaves, dirt, and other debris from around the generator and its vents. Restricted airflow can cause overheating while the generator is running. Don’t cover the unit or block its intake and exhaust openings in an attempt to protect it from freezing temperatures.
Test the Generator Under Household Load
A brief startup doesn’t prove that a generator will carry household circuits through an outage. Testing under load gives the starting system, control board, electrical connections, and engine a more meaningful check.
Before winter, run the generator under load for about 20 to 30 minutes if the manufacturer’s instructions allow it. For a standby generator, follow the operating procedure in the manual and avoid altering wiring, the transfer switch, or control settings. Note any unusual noise, warning lights, error codes, hesitation, surging, or shutdown during the test.
If the generator doesn’t start, begin with the basic checks identified in the manual: fuel level, control-panel settings, breaker status, and digital diagnostic codes. Battery failure, clogged filters, fuel-system degradation, and control-panel faults are common issues that require repair. Poor performance under load is a reason to arrange service before relying on the generator during a freeze.
Keep the access area clear so an electrician can safely inspect the enclosure, connections, battery, exhaust components, and controls.
Arrange Service Before Winter Weather Creates an Emergency
Professional service is appropriate when the generator has missed annual maintenance, fails to start or transfer properly, displays a fault code, has a weak battery, leaks fluid, or performs poorly under load. It’s also appropriate when you’re unsure whether a portable generator connection uses an approved transfer switch.
During a maintenance visit, we inspect the battery, fuel system, exhaust system, and oil level; clean the unit; replace worn parts as needed; test it under load; and review the control panel and software. We install Generac and Kohler generators and provide repair and maintenance for existing standby systems.
Testing early gives you time to correct an issue under safe conditions instead of diagnosing a failure during an outage. For generator service in Austin, contact TruTec Electric at (512) 641-5311 to schedule service.