Pool Automation Freeze Protection: Winter Settings for NJ

By the BlueIQ Pools team · October 6, 2026

Short answer: freeze protection is a feature in Pentair, Hayward and Jandy automation that automatically runs your pump when the outdoor air gets close to freezing, so moving water protects the pipes and equipment. It only works if the pool is open, the power is on and the right circuits are assigned to it. Once a pool is fully closed and winterized, the pump should not be allowed to turn on.

How freeze protection works

Your automation controller has an air temperature sensor, usually mounted near the equipment pad. When the air temperature drops below the freeze setpoint - typically in the mid-to-high 30s F, depending on the system and how it is configured - the controller turns on the pump and any other circuits assigned to freeze protection. Water that keeps moving is far less likely to freeze inside the pump, filter, heater and plumbing. When the air warms back up, the system returns to its normal schedule.

Pentair IntelliCenter, EasyTouch and IntelliTouch, Hayward OmniLogic and ProLogic, and Jandy AquaLink all include this feature. The menus differ, but the idea is the same.

Who needs it in New Jersey

• Pools and spas kept open into late fall - common with heated pools and spas used on cool evenings.
• Year-round spas and spillover spas that stay in use through the winter.
• The weeks before closing - NJ often gets its first frost nights in October, before many pools are winterized.
• Shore homes where nobody is on site to notice a cold snap.

Settings to check before the first frost

• Freeze protection is enabled on the circuits that move water: the main pool circuit and, if you have one, the spa.
• Water features, cleaners and solar - decide which ones need to run. Water features and in-floor lines can freeze too; a booster pump for a pressure cleaner usually does not need to run on its own.
• Variable-speed pump speed - set a freeze-protection speed high enough to move water through every line, including the heater and any spa or spillover lines.
• Valve positions - if the system switches between pool and spa, make sure freeze protection circulates both bodies of water, not just one.
• Air sensor reading - compare it with a real thermometer. A failed or badly placed sensor (for example in direct sun) can keep freeze protection from ever turning on.
• Heater - freeze protection circulates water; it does not need to fire the heater. If you heat a spa in winter, confirm the heater settings separately.

Freeze protection is not a winterization

Freeze protection depends on electricity and a working pump. During a winter power outage, a tripped breaker or a pump failure, nothing is protecting the plumbing - and in NJ ice storms, outages are not rare. For a pool that will not be used until spring, a proper closing is still the safest choice: lines blown out and plugged, antifreeze in the lines, and the pump, filter and heater drained.

Turn it off after a full closing

This is a common and costly mistake. After a pool is winterized, the pump and filter are drained. If freeze protection is still active, the controller can start a dry pump on the first cold night, which can damage the pump seal and motor. After closing, the pump circuits should be disabled at the controller or the equipment should be powered down, following your closing checklist.

Salt systems in cold water

Most salt chlorine generators stop producing chlorine when the water gets cold. That is normal and is not a sign the cell has failed. For a closed pool, the salt cell is usually removed, cleaned and stored indoors for the winter.

Want us to check your settings?

We can review your Pentair, Hayward or Jandy freeze-protection settings, test the air sensor, and set your automation up correctly for an open or a closed winter - or handle the full closing for you.