Cold Snap Still Here – Don’t Let the Freeze Take Your Spa in Wisconsin

The forecast is calling for continued bitter temperatures across Wisconsin, and that means one thing for hot tub and spa owners: your spa is still at risk. Extended cold can spell disaster for your spa's plumbing, heater, and other components if left unchecked. With a little inspection and preventative care, you can avoid costly freeze damage and keep your hot tub running safely through Wisconsin winter weather.

1. Keep Your Spa Running

Moving, heated water is your spa’s best defense against freezing. Even a short shutdown during extreme cold can allow water in the plumbing to freeze, expand, and crack pipes or equipment. Causing damage that can be costly to repair.

If you’re unsure whether your spa is properly winterized or set up for cold operation, it’s best to assume it needs to stay on, full, and circulating during Wisconsin's freezing temperatures.

2. Check Water Level & Flow

• Low water means the pump can pull in air, leading to poor circulation and reduced heading - a major freeze risk during cold snaps.
• Open all jets so warm water flows through every line, even those that aren’t used often. Closed jets trap cold water in pipes and increase the chance of freeze damage.

3. Inspect Filters & Equipment

A dirty worn, or expired filter can restrict water flow and cause heaters to shut off, increasing freeze risk. Clean or replace filter if needed to keep your spa operating properly in cold weather.

Take a quick look under the spa as well. List for unusual noises and check for leaks or electrical issues. Catching problems early can help prevent bigger, more expensive repairs.

4. Double-Check Your Freeze Protection

Many Modern spas have built-in freeze sensors and circulation that kick in automatically – but don’t assume they’re working unless you check. Ensure freeze protection mode is ON and functioning properly.

If you don’t have auto freeze protection, run your pump constantly or on frequent cycles to keep water moving.

5. Don't Forget the Cover

A quality, well-fitted cover dramatically reduces heat loss and protects your water from the cold, snow, and ice. A cover in poor condition or left off is one of the biggest contributors to freeze issues.

6. Power Outage Prep

Cold snaps often bring winter storms and power outages. With no electricity, even a well-maintained spa can freeze quickly. Preparing ahead of time can make a big difference in preventing costly freeze damage.

During extreme cold, we recommend setting your spa temperature to its highest setting. This helps retain as much heat as possible and gives your spa a buffer in the event of a power outage.

If the power does go out, acting quickly is key. Placing a 1500-watt ceramic space heater inside the equipment area can help protect plumbing and components from freezing until power is restored. Be sure the heater is positioned safely, kept dry, and plugged into a GFCI-protected outlet.

If you live in an area prone to outages, planning for a backup generator can provide additional peace of mind. And if you’re unsure how to safely access the equipment area or set up temporary heat, contact our service team for guidance.

7. Know When to Call the Pros

If you see error codes, odd behavior, or suspect a component isn’t working right, don’t wait for temperatures to plummet further – give us a call. A-1 Pools’ service team can help diagnose, adjust programming, or schedule winterization if needed.

Bottom Line

This cold snap isn’t over yet – but a few proactive checks now can keep your spa warm, functional, and protected through the worst winer. If you’re unsure about anything, or just want peace of mind, reach out and we’ll help you get your spa ready for whatever winter throws next.