Replace Your Aging Block Heater Before Winter Puts Your Power at Risk

When winter weather settles in, your standby generator becomes one of your most important pieces of equipment. But even the best Generac Industrial Energy generators can struggle to start when you need them most especially if an aging block heater is involved. If your generator’s block heater is between 2-4 years old, now is the time to replace it to ensure reliable performance during freezing temperatures.

Why the Block Heater Matters

A block heater keeps your Generac standby generator warm so it can start instantly no matter how cold it gets. Without it, cold oil thickens, internal components stiffen, and your generator may crank slowly… or refuse to start altogether.

For Wisconsin businesses, dairy farms, and industrial facilities, a generator that won’t start isn’t just inconvenient, it’s costly and dangerous.

Aging Block Heaters Are One of the Top Causes of Starting Issues

Block heaters play a crucial role in generator reliability, especially in cold climates. These heaters are installed directly on the engine block to keep the engine warm when the generator is not running. By maintaining a consistent temperature, the block heater prevents oil from thickening, reduces strain on internal components, and ensures the generator can start instantly when an outage occurs.

Over time, block heaters gradually lose effectiveness. After 2-4 years of continuous use, the heating element can weaken or burn out entirely. When that happens, the engine isn’t kept at the proper operating temperature, leaving you vulnerable to:

• Delayed or unsuccessful generator startup
• Increased engine wear
• Frozen components during sub-zero temperatures
• Unexpected downtime during an outage
• Potential livestock, product, or equipment loss

Replacing the block heater proactively is far more cost-effective than dealing with the consequences of a generator that won’t start especially for Generac Industrial Energy equipment protecting mission-critical loads.

How to Know When It’s Time to Replace

If your block heater is in that 2-4 year window, it should be replaced during your generator’s annual service. In addition, watch for these warning signs:

• Generator struggles to start during cold mornings
• Visible corrosion on the heater or electrical connections
• GFCI breakers continually tripping
• The heater feels warm, but not hot, to the touch
• Flickering or inconsistent temperature readings

Even if no symptoms are present, age alone is a strong reason to replace the heater before winter hits—particularly on Generac generators powering high-demand facilities. A fresh block heater ensures reliable cold-weather starts and protects your investment for years to come.

Winter Power Outages Are Becoming More Common

Wisconsin and other northern states continue to see more frequent strain on the electrical grid, along with severe winter storms that can knock out power for hours or even days.

A reliable block heater ensures your Generac Industrial Energy generator fires up instantly to protect:

• Dairy farm operations
• Commercial and industrial equipment
• Refrigeration systems
• Critical HVAC equipment
• Facility safety and security systems

Don’t Wait Until Temperatures Drop, Act Now

Proactive generator maintenance is good business. Replacing your block heater before winter:

• Reduces the risk of startup issues
• Extends generator lifespan
• Minimizes costly emergency service calls
• Ensures peace of mind when outages strike

Schedule Your Replacement Today

Your generator is only as reliable as the components supporting it. If your block heater is 2-4 years old, replace it now before winter storms and power outages catch you off guard.

👉 Contact Wolter’s generator service team today to schedule a block heater inspection or replacement for your Generac or Generac Industrial Energy system.
Stay ready. Stay powered. All winter long.