Freeze Events in Kennesaw: Protecting Pipes, Heat Strips & Heat Pumps

Why the occasional freeze catches Kennesaw off guard

Kennesaw winters are mild most of the time, which is exactly why a hard freeze causes so much trouble. When the forecast drops into the teens for a night or two, systems that coast through a normal January suddenly get pushed to their limits, and homeowners who never think about their heat find out fast whether it is up to the job.

During a freeze, three things are under stress at the same time: your heat pump, your backup heat strips, and your plumbing. Understanding how each behaves in the cold is the difference between a comfortable night and a middle-of-the-night no-heat call.

How a heat pump handles a hard freeze

A heat pump heats your home by pulling warmth out of the outdoor air, which works well in a Georgia winter most of the time. But as the outdoor temperature falls into the 20s and teens, there is less heat available to extract, so the heat pump delivers less and works harder. It also runs a defrost cycle, periodically reversing to melt frost off the outdoor coil, and during a freeze it may need to do that often.

This is normal, but it looks alarming. You may see steam rising off the outdoor unit during defrost, or hear the system change sounds. What is not normal is the outdoor unit turning into a solid block of ice, which means the defrost cycle is failing or the unit is buried in freezing rain. That is when to switch to backup heat and call.

The backup heat strips and why they matter

When the heat pump cannot keep up in a freeze, electric heat strips in the air handler kick on to make up the difference. These are your safety net, and on a genuinely cold night they carry a lot of the load. Two things go wrong with them.

• They draw a lot of power, so a freeze that runs them for days produces eye-watering electric bills.
• If a strip or its sequencer fails, you can be left with a heat pump that cannot keep up and no backup, which shows up as a house that slowly gets colder.
• Emergency Heat mode forces the strips on and locks out the heat pump, useful when the outdoor unit is iced but expensive to leave on.

Protecting your pipes at the same time

A freeze does not just threaten your HVAC, it threatens your plumbing, and in Kennesaw homes the vulnerable pipes are the ones running through unconditioned crawl spaces, garages, and exterior walls. A burst pipe during a freeze is a far bigger emergency than a slow furnace.

• Let a thin stream of water drip from the fixture farthest from your main, since moving water resists freezing.
• Open cabinet doors under sinks so heated room air reaches the supply lines.
• Disconnect and drain garden hoses, and cover outdoor spigots with insulating caps.
• Keep the thermostat at a steady temperature day and night during the freeze rather than setting it back.
• Know where your main shutoff is so you can stop the water fast if a pipe does burst.

The maintenance that prevents a freeze-night failure

Most freeze-night breakdowns are not random. They are weak components that a fall heating check would have caught, finally failing under the added load of a cold snap. A worn capacitor, a pitted contactor, a heat strip nearing the end of its life, or a defrost sensor drifting out of range will all limp along on a mild day and quit when the system is pushed hard.

A furnace and heat pump check before winter tests these parts under load, confirms the defrost cycle works, and verifies the backup heat actually engages when called. It is far cheaper to replace a failing capacitor in November than to pay for an emergency visit at 2 a.m. during a freeze.

What to do the night the heat fails in a freeze

If your heat goes out during a hard freeze, work through the basics before you assume the worst, then call if it does not resolve.

• Check the thermostat has power and is set to Heat, and try Emergency Heat if the outdoor unit is iced.
• Look for a tripped breaker on the air handler or heat strips and reset it once.
• Make sure the outdoor unit is not buried in ice or blocked by debris.
• Protect your pipes with dripping faucets while you wait for service, because a cold house is a frozen-pipe risk.
• If there is no warm air after these steps, call for emergency service rather than letting the house drop.

Get freeze-ready before the next cold snap

The homeowners who get through Kennesaw freezes without a crisis are the ones who had their systems checked in the fall and knew their pipe-protection routine before the cold arrived. If your heat is out during a freeze right now, or you want your heat pump, strips, and controls checked before the next one, call HVAC Kennesaw GA at +1 (327) 210-5999. We keep Kennesaw homes warm when the temperature actually drops.