How Do I Prepare My HVAC and Home for a Texas Freeze?
Hard freezes are rare on the Gulf Coast but brutal when they arrive. How to protect your heat pump, furnace, pipes, and family before the next multi-day freeze event — lessons from February 2021.
Preparing for a Gulf Coast freeze comes down to four moves: verify your heating system works before you need it, protect exposed pipes and the outdoor unit, plan for power loss, and know how to run your system efficiently through the event. Our region's freezes are rare — which is exactly why they're dangerous. Equipment that sat untested since March, pipes that have never seen 20°F, and a grid under record load all fail at the same time. An hour of preparation in November beats a crisis in January.
Why are freeze events so hard on Gulf Coast homes?
Homes here are built to shed heat, not hold it: slab foundations with shallow or exposed pipe runs, minimal insulation by northern standards, and heating systems sized for mild winters. February 2021 made the pattern plain — burst pipes and failed heat did more damage in three days than most hurricanes manage. And because every home strains the grid at once, ERCOT-directed outages can remove the electricity your heat depends on precisely when you need it most.
What should I check on my heating system before winter?
- Run the heat in November — a full cycle, not thirty seconds. A faint burning smell in the first minutes is normal dust; anything persistent, or a system that won't produce warm air, is a service call while appointments are still easy to get.
- Heat pump owners: confirm your auxiliary/emergency heat actually engages. During a hard freeze the backup strips do the heavy lifting.
- Furnace owners: replace the filter and make sure the flue and combustion-air openings are clear. A furnace starved for air trips its safety switches on the coldest night.
- Everyone: replace thermostat batteries, and consider a tune-up — heating checks are part of our maintenance plans.
How do I protect pipes and outdoor equipment?
Insulate exposed pipes — outdoor hose bibs, attic and garage runs, and the condensate drain line. Foam sleeves are cheap and take minutes. When a freeze warning hits: disconnect hoses, drip faucets on exterior walls, open cabinet doors under sinks, and know where your main water shutoff is (a burst pipe with the water off is a mess; with it on, it's a disaster).
Heat pumps defrost themselves — a little steam and water around the outdoor unit is normal. Don't cover the unit or chip ice off it; do keep its drainage path clear so meltwater doesn't refreeze underneath and lock the fan.
What's the plan if the power goes out during a freeze?
No electric heat of any kind — heat pump, strips, or even a gas furnace's blower — runs without power. If CenterPoint or TNMP sheds load during a freeze, your options are what you arranged in advance: a standby generator that carries heat automatically, a portable generator run safely outdoors for essentials, or consolidating the household into one room with safe supplemental heat. Never run a generator, grill, or camp stove indoors — carbon monoxide kills quietly and quickly.
If outage resilience is the concern that brought you here, start with our outage preparedness guide and the generator sizing guide — freeze events and hurricane season share the same answer.
Quick answers
Should I let my heat pump run continuously during a freeze?
Set it and leave it — pick a reasonable temperature and don't chase the thermostat up and down. Big setbacks force long recovery runs on backup strips, which is the most expensive heat in your house.
Why is my heat pump blowing steam in the cold?
That's the defrost cycle melting frost off the outdoor coil — normal operation, not a malfunction. Persistent thick ice that never clears is the time to call.
Do I need to cover my outdoor AC or heat pump in winter?
No — heat pumps must stay uncovered to run, and covers trap corrosive moisture against AC coils. Gulf Coast units are built to sit outside.
Plan members get seasonal checks on the schedule that matters — including the heating check most Gulf Coast homes skip.
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