5 Things to Know About Winterizing a Pool Heater in Mild Climates

Skip draining and blowing out lines In areas that don’t freeze hard, you don’t need to drain the heater or blow out the lines. The real threats are corrosion from moisture and critters nesting inside.

Turn off the gas valve Shut off the gas valve at the unit and at the main supply if you want extra safety. That’s all the gas winterization needed.

Use a weatherproof cover A cover solves the biggest problem: mice nesting in the burner compartment. It also protects against rain and debris.

Only drain if temps drop below 32°F for days If you’re in a zone that occasionally dips below freezing for several days straight, remove the drain plugs and let water run out. No air compressor needed.

For heat pumps, cover the disconnect box If you have a heat pump, disconnect the electrical and cover the disconnect box. The heater itself doesn’t need full winterization.