How Do I Prepare My HVAC System for Extreme Cold Snaps?

When Iowa’s winter weather hits hard, your HVAC system becomes your home’s unsung hero. But when temperatures plunge well below freezing, even the best systems can struggle—unless you’re prepared. At Golden Rule Plumbing, Heating, Cooling & Electrical, we believe that preparation is the best form of protection. A few simple steps before a cold snap can mean the difference between a warm, comfortable home and an emergency call in the middle of the night.

Here’s how to get your HVAC system winter-ready so you can weather any polar blast with confidence.

1. Schedule a Professional HVAC Tune-Up

Your first line of defense against a breakdown is a pre-winter HVAC tune-up. Regular maintenance helps your system operate efficiently, extends its lifespan, and catches small problems before they become major repairs.

During a tune-up, a licensed Golden Rule technician will:

• Inspect and clean burners, coils, and blowers
• Check for gas or carbon monoxide leaks
• Calibrate your thermostat
• Test safety controls and electrical connections
• Replace or clean the air filter

Routine maintenance ensures your furnace runs at peak performance even when outdoor temps plummet. Plus, our Golden Rule Club Membership offers priority service and discounts—perfect for homeowners who want peace of mind year-round.

Learn more about our HVAC maintenance plans

2. Replace or Clean Air Filters

A dirty air filter is one of the most common causes of furnace problems during extreme cold. When filters clog, your system has to work harder to move air through, which reduces efficiency and puts unnecessary strain on components.

Before winter hits—and at least once a month during heavy use—check your air filter. Replace it with a new one if it’s dirty, or clean it if your system uses reusable filters. Clean filters not only protect your furnace but also help maintain healthy indoor air quality, which is especially important when windows stay shut all season.

3. Inspect Vents and Registers

Blocked vents restrict airflow and cause uneven heating, making your furnace work overtime. Take a walk around your home and make sure all vents and registers are open, unobstructed, and free from dust or debris.

If certain rooms feel colder than others, you may have a duct issue or insulation problem. Our technicians can inspect your ductwork for leaks, gaps, or poor insulation—common issues that cause heat loss and higher energy bills.

4. Check Your Thermostat Settings

It’s easy to overlook your thermostat, but it’s the control center of your entire HVAC system. Make sure your thermostat is set to “heat” mode and programmed for efficiency.

For the best results, use a programmable or smart thermostat. These devices automatically adjust the temperature based on your schedule, saving energy when you’re asleep or away. For example, you can set your home to 68°F during the day and lower it a few degrees at night to reduce heating costs without sacrificing comfort.

If you’re not sure which thermostat is best for your home, our experts can help install and calibrate one that integrates seamlessly with your existing system.

5. Protect Outdoor Units

If you have a heat pump or any outdoor HVAC components, they’re exposed to the elements all winter long. Clear away leaves, snow, or ice from around the unit, and maintain at least two feet of clearance on all sides.

Never cover your outdoor unit with a plastic tarp—it traps moisture and can cause rust. Instead, use a breathable, manufacturer-approved cover designed to protect against snow while allowing airflow.

6. Seal Air Leaks and Improve Insulation

Even the most efficient furnace can’t compensate for a drafty home. Before the cold arrives, inspect windows, doors, and attic spaces for leaks. Apply weatherstripping or caulk where needed and add insulation to attics and crawl spaces if necessary.

These improvements not only help your HVAC system work less but also make your home more comfortable and reduce energy costs. It’s one of the simplest upgrades with the biggest payoffs.

7. Know the Warning Signs of Trouble

Sometimes, despite your best efforts, issues can arise. Pay attention to these warning signs that your furnace may need professional attention:

• Unusual noises like banging or rattling
• Weak or uneven airflow
• Short cycling (turning on and off frequently)
• Strange odors or burning smells
• Rising energy bills without increased use

If you notice any of these, don’t wait. Contact Golden Rule’s expert HVAC team right away to prevent a small issue from turning into a costly emergency repair.

8. Have an Emergency Plan

Finally, prepare for the unexpected. Keep space heaters, blankets, and extra filters on hand just in case. If your system does go out during a cold snap, Golden Rule’s emergency repair services are available to get you back up and running fast.

We’re Iowans, too—we know how brutal winters can be. That’s why our mission is simple: treat others the way we’d want to be treated, with reliable service, honest pricing, and top-quality workmanship.

Stay Warm This Winter With Golden Rule

Extreme cold snaps are no match for a well-prepared home. By taking these steps, you’ll ensure your HVAC system is ready to handle anything winter throws its way.

Whether you need a tune-up, repair, or system replacement, the trusted professionals at Golden Rule Plumbing, Heating, Cooling & Electrical are here to help.