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How to Properly Winterize Your Pool Heater

Author: Evelyn w

Sep. 16, 2025

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Winter is just around the corner. For pool owners, this means it’s time to start thinking about winterizing your pool heater. If you don’t take the right steps, your heater could be damaged by freezing temperatures. Let’s walk through the process together!

Want more information on winterizing pool heater? Feel free to contact us.

1. Gather Your Supplies

Before you begin winterizing your pool heater, you’ll need a few items:

  • Wrench set
  • Bucket
  • Air compressor (optional)
  • Winterizing chemicals
  • Pool cover

“Why do I need all this stuff?” you might ask. Simple! Each item plays a role in making sure your heater stays safe during the cold months.”

2. Turn Off the Heater

First things first, safety comes first.

“How do I turn off the heater?” you might wonder. Just locate the power switch and turn it off. Disconnect the power supply if you can.

3. Drain the Heater

Next, you want to drain all the water from your heater. This step is crucial to avoid freezing.

“Shouldn’t I just let it drain on its own?” No! You need to open the drain valve at the bottom. This will ensure all water leaves the system.

4. Remove All Hoses

Now it’s time to disconnect the hoses. Check every hose connected to the heater and carefully remove them one by one.

“Do I have to clean them?” It’s a good idea! Clean hoses will help you in the spring when you want to reconnect everything.

5. Blow Out the Lines

If you have an air compressor, use it to blow out any remaining water from the lines. If not, skip this step.

“How do I know when to stop?” Keep going until you see only air coming out. This ensures there’s no water left to freeze and expand, which can damage your system.

6. Add Winterizing Chemicals

Adding chemicals is essential for maintaining water clarity and preventing algae growth. Follow the instructions on your winterizing chemical kit.

“Does it really matter?” Yes, it does! If you skip this step, you could have a messy pool to deal with come spring.”

7. Cover the Heater

Finally, cover your pool heater with a tarp or specific cover designed for your model. This protects it from debris and moisture. Make sure it’s secured to avoid flapping in the wind.

“Won’t the cover trap moisture?” That’s why it’s crucial to ensure everything is dry before you cover it!”

8. Check Everything Again

Take a moment to review your work. Look for any missed steps. It’s better to double-check now than to face problems later.

“Is it really that important?” Absolutely! A properly winterized pool heater can save you a lot of money on repairs.”

In conclusion, winterizing your pool heater is an essential process to protect your investment during the colder months. Taking the time and care to follow these steps ensures that your heater will be ready to go when spring arrives. If you have questions or need specific supplies, please contact us or your supplier for further assistance. Enjoy your winter break, and remember: a little preparation goes a long way!

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