How to Keep Your Water Heater Working Efficiently in Cold Weather

When cold weather hits the Gulf Coast, it’s not just your pipes that feel the strain — your water heater does, too. Even though our winters are mild compared to up north, the temperature drop still affects how your system performs. If your showers suddenly feel shorter or your sink water isn’t as warm as usual, your water heater might be struggling to keep up.

Here’s how to keep it working efficiently and avoid mid-winter plumbing headaches.

1. Flush Out Sediment Buildup

Over time, minerals from your water supply settle at the bottom of your tank. This sediment acts like a blanket that makes it harder for your heater to warm the water — forcing it to work harder and use more energy.
👉 Tip: Drain a few gallons from the tank every 6–12 months to remove buildup and improve efficiency. If it’s been a while, have a professional perform a full flush.

2. Insulate Your Water Heater and Pipes

When it’s 30° outside, exposed plumbing cools quickly — especially in garages, attics, or crawl spaces. Wrapping your water heater with an insulation blanket and adding pipe insulation helps retain heat, saves energy, and keeps your water hotter for longer.

3. Check the Temperature Setting

Many homeowners keep their water heater set higher than necessary. The ideal temperature is around 120°F — warm enough to prevent bacteria growth but not so hot that it wastes energy or risks scalding.
If you notice cooler water during cold snaps, try bumping it up just 5–10 degrees, but avoid going past 130°F.

4. Test the Pressure Relief Valve

Your water heater’s pressure relief valve is a small but vital safety feature. It prevents pressure buildup that could cause leaks — or worse, tank bursts. Test it by lifting the lever slightly; you should hear water discharge into the drain line. If it doesn’t, have it inspected or replaced right away.

5. Schedule a Professional Inspection

Before the holidays or coldest weeks of winter, it’s smart to have a licensed plumber inspect your system. They’ll check for corrosion, leaks, thermostat issues, and ensure your heater is running at peak efficiency. A quick tune-up now can save you from emergency repairs later.

Stay Warm and Worry-Free This Winter

Your water heater is one of the hardest-working appliances in your home — especially during the colder months when guests are visiting and everyone’s using more hot water. Keeping it maintained ensures steady performance, lower energy bills, and peace of mind.

If you notice slow heating, inconsistent temperatures, or strange noises, don’t wait until it stops working.
Call Cole’s Plumbing today — we’ll inspect, flush, and tune up your water heater so your home stays comfortable all winter long.