How to Protect Your Plano Pool From a Texas Freeze

Texas pool owners don’t think about freezes for most of the year, and then a hard cold front drops out of the plains and the temperature falls into the teens overnight. After the February 2021 freeze, nobody in Plano needs reminding how much damage a few below-freezing hours can do. The National Weather Service in Fort Worth recorded 139 consecutive hours at or below freezing at DFW Airport during that event, from the evening of February 13 through midday on February 19. That is nearly six straight days, and it is why so much equipment failed. The good news is that protecting your pool through a freeze is straightforward once you know the plan. The key is that moving water does not freeze nearly as easily as still water.

Why freezes crack pool equipment

Water expands when it freezes. When water sitting still inside your pump, filter, plumbing, or valves turns to ice, it pushes outward with enough force to crack a pump housing, split a filter, or burst a pipe. The pool itself, with thousands of gallons of relatively warm water, almost never freezes solid in our climate. The vulnerable parts are the small volumes of water in the exposed equipment above ground, where the cold air reaches them directly.

That’s why the entire strategy comes down to one idea: keep the water moving so it can’t freeze where it would do damage.

Before the freeze: get ready

North Texas usually gives you a day or two of warning before a hard front arrives. Use it.

1. Confirm your pump will run continuously. If you run on a timer, set it to run 24 hours through the freeze event, or switch it to manual on. The pump shutting off in the middle of the night is the classic failure.
2. Clear leaves and debris from the skimmer and pump baskets. Good flow matters more than ever when you’re relying on circulation.
3. Make sure the water level is normal. Too low and the skimmer can suck air, which breaks circulation. Top off if needed before it gets cold.
4. Open any freeze-protection features. Many newer systems have a built-in freeze guard that kicks the pump on automatically when it gets cold. Know whether yours has one and that it is enabled.
5. Insulate exposed equipment if you can. Wrapping the pump and exposed pipes with towels, blankets, or pipe insulation buys you margin, especially if the power flickers.

The freeze guard problem nobody explains

Most homeowners assume a freeze guard means the pool is handled. It’s more limited than that, and the limits are worth understanding before the front arrives rather than after. Start by working out which of three setups you actually have, because they behave completely differently.

Four traps sit inside that table. The first is the biggest: freeze protection is a feature of powered equipment. It does nothing during an outage, which is the exact scenario that broke so much equipment in 2021. Anyone treating a freeze guard as insurance against a Texas grid event has misread what it is.

The second is valve position. Freeze protection circulates water through whatever path your valves are currently set to. If a three-way valve is turned to pool only, the spa plumbing, the spillover line, and the waterfall feed all sit full of still water while the pump hums away thinking it has done its job. Raised spas and sheer descents are usually the most exposed plumbing on the property, which makes this an expensive thing to get wrong.

The third is speed. A variable-speed pump in freeze mode runs at whatever RPM it was programmed to, and a low, energy-saving preset can be enough to satisfy the pump without being enough to keep water moving through a long run of exposed pipe. If you have a variable-speed pump, find out what speed its freeze mode uses before you need it.

The fourth is where the sensor lives. Freeze protection triggers off an air temperature sensor, and a sensor mounted in a sheltered spot, in direct afternoon sun, or inside a warm equipment enclosure will read several degrees higher than the pipes it is meant to be protecting. That gap is why the manufacturers set their defaults in the high 30s rather than at 32 in the first place.

The heater is the expensive one

If your pad has a gas heater, it deserves separate attention. A heat exchanger full of still water that freezes is the single costliest failure on the pad, and unlike a pump housing it isn’t a modest part swap. Some heaters have their own internal freeze protection, but as with everything else on this list, it depends on the unit having power. Before a hard freeze, know where the heater drain plugs are. During an extended outage, they come out along with the pump and filter plugs.

Salt systems have a different cold-weather quirk: most chlorine generators reduce or stop output once water temperature drops into the low to mid 50s, so a salt pool in a cold snap is effectively unsanitized until it warms back up. We cover how to handle that in running a pool through the winter.

During the freeze: keep it moving

Once the temperature is below freezing, the rule is simple: don’t turn the pump off. Let it run continuously, day and night, until temperatures climb back above 32 degrees and stay there. Moving water in the pipes and equipment resists freezing far better than still water, so as long as the system keeps circulating, you’re in good shape.

Check on the equipment periodically through the cold snap. You want to confirm the pump is still running and water is still flowing. If you see flow stop, that’s the moment to act rather than wait.

After the freeze: check for damage

Once it warms back up and any ice has thawed, do a walk-around before you assume everything is fine:

• Look for leaks around the pump, filter, valves, and visible plumbing. A hairline crack from freezing often shows up as a drip or a puddle once the system is running normally again.
• Check the pump basket and lid for cracks, and watch that the pump primes and holds pressure.
• Watch your water level over the next few days. A slow, unexplained drop can mean a freeze-cracked line.
• Listen and look for odd behavior from the equipment, such as new noises, low flow, or pressure that won’t build.

Catching a small freeze crack early can mean a simple part replacement instead of a flooded equipment pad and a much bigger repair bill. If the walk-around turns up something, our guide to freeze damage covers the restart sequence, what each repair runs around here, and the point at which to stop and call.

Do you need to winterize a pool in Plano?

Not in the way northern states do. In cold climates, pools are fully drained down, blown out, and closed for months. In DFW, our winters are mild with short freeze events, so you keep the pool full and running year-round and simply protect the equipment when a freeze comes through. In fact, draining a pool in our expansive clay soil can do real harm, since an empty pool can shift or pop out of the ground. The water belongs in the pool.

What does help over winter is keeping up on basic chemistry and circulation, even at a reduced level. A pool that goes into a freeze already balanced and clean comes out the other side in much better shape. If you would rather not stand outside at midnight checking your pump in an ice storm, this is one of the things a service plan is for. We keep an eye on freeze events and make sure your system is set up to ride them out.