What are the top reasons a Generac generator won't start?

The most common reasons a Generac (or any standby) generator won’t start are a dead battery, a fuel supply problem, or low/contaminated fluids. Batteries frequently fail and are a top no‑start cause. Clogged or empty fuel lines/tanks stop gas, diesel, or propane units from firing. Low oil or coolant can trigger safety shutdowns. Worn belts can also prevent operation. Paul The Plumber services all makes and models, including Generac, in areas like Nashua, NH.

Quick checks:

• Confirm battery charge and clean terminals.
• Verify fuel level and open valves; inspect fuel lines.
• Check oil and coolant levels.

Updated: 2025-12-12 00:00:00

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