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HeatingDecember 15, 2025·5 min read
When Winter Strikes: How Frozen Pipes Can Silently Damage Your HVAC System
A hard freeze does more than burst plumbing — it can quietly harm your HVAC. Here's how to protect it.

Huntsville doesn't freeze often, but when it does, systems built for mild winters can take a hit. The damage isn't always obvious right away.
The hidden risks
- Frozen condensate lines backing water into the system
- Cracked drain pans and water damage
- Heat pumps struggling and icing over in extreme cold
- Pipes near the air handler freezing and bursting
Protect your system before a freeze
- Keep the heat on — even when away — set no lower than the mid-50s
- Make sure the condensate line is insulated where it's exposed
- Replace a clogged filter so airflow stays strong
- Know where your shutoffs are, just in case
If your system iced up or acted strange after a cold snap, don't wait for it to thaw and hope. A quick inspection catches damage before it becomes a bigger repair.