How to Prepare Your HVAC System for Winter: A Complete Checklist

winter hvac maintenance

Winter in Salt Lake Valley brings frigid temperatures, heavy snowfall, and increased strain on your home’s heating system but that’s nothing a proper furnace tune-up can’t fix. As temperatures drop across Utah, ensuring your HVAC system is winter-ready isn’t just about comfort—it’s about safety and savings. At Green Line Plumbing, Heating and Air, we’ve helped countless Salt Lake City homeowners prepare their heating systems for our harsh Utah winters. Proper preparation can prevent emergency breakdowns during the coldest days, extend your system’s lifespan, and significantly reduce your energy bills. This comprehensive guide provides everything Salt Lake Valley residents need to know about winterizing their HVAC systems before the snow starts falling.

Key Takeaways

  • Schedule professional HVAC maintenance with Green Line Plumbing, Heating and Air before winter hits Salt Lake Valley
  • Replace furnace filters monthly during winter months for optimal efficiency
  • Seal ductwork to prevent heated air from escaping into unconditioned spaces
  • Install a programmable thermostat to save up to 10% on heating costs
  • Clear debris from outdoor heating units to prevent damage and efficiency loss
  • Consider upgrading to high-efficiency heating systems for long-term energy savings
  • Prepare your home with proper insulation and weatherstripping to maximize heating efficiency

Replace or Clean Air Filters

The simplest yet most impactful winter preparation task is replacing or cleaning your furnace filters. Dirty filters restrict airflow, forcing your heating system to work harder, which increases energy consumption and reduces the lifespan of your equipment.

For Salt Lake City homes, especially those affected by our unique inversion weather patterns, clean filters are essential for maintaining indoor air quality during winter months when windows remain closed. We recommend checking filters monthly and replacing them at least every 90 days—more frequently if you have pets or family members with allergies.

High-quality pleated filters with a MERV rating between 8-12 offer the best balance of filtration and airflow for most Salt Lake Valley residences. For those concerned about our occasionally poor winter air quality, consider upgrading to higher MERV ratings or installing whole-home air purification systems.

Schedule a Furnace Tune-Up

Before the first snowfall hits the Wasatch Front, schedule a comprehensive furnace inspection with a certified HVAC technician from Green Line Plumbing, Heating and Air. Our 25-point maintenance checklist includes:

  • Inspecting heat exchangers for cracks that could lead to dangerous carbon monoxide leaks
  • Checking and calibrating thermostats for accurate temperature control
  • Testing safety controls and limit switches
  • Lubricating moving parts to reduce friction and wear
  • Inspecting electrical connections and components
  • Checking gas lines for leaks (for gas furnaces)
  • Examining burners and flame sensors
  • Cleaning blower components

Professional maintenance and furnace tune-up’s not only ensure safety but can improve efficiency by up to 30%, significantly reducing your winter heating bills. For Salt Lake Valley residents, our maintenance plans include priority service during busy winter months when emergency calls spike due to extreme cold.

Seal and Insulate Ductwork

In many Utah homes, especially older properties in neighborhoods like Sugar House or Holladay, leaky ductwork can waste up to 30% of heated air before it reaches your living spaces. Before winter sets in, inspect accessible ductwork in attics, crawl spaces, and basements for:

  • Visible gaps or disconnections at joints
  • Missing or damaged insulation
  • Crushed or restricted sections
  • Signs of pest damage

Sealing ductwork with mastic sealant or metal-backed tape (not standard duct tape) can dramatically improve system efficiency. For ducts in unconditioned spaces like attics, adding insulation sleeves helps prevent heat loss as warm air travels through cold areas.

For comprehensive duct sealing, Green Line offers professional aeroseal services that seal leaks from inside the ductwork, reaching areas that aren’t accessible manually.

Test Your Heating System Early

Don’t wait until the first cold snap to turn on your heating system. Test it at least a month before winter typically begins in the Salt Lake Valley (usually by early October). Running your system for a few hours allows you to identify potential problems while temperatures are still mild.

During your test run:

  • Listen for unusual noises like banging, whistling, or scraping
  • Check that all vents are delivering warm air
  • Monitor how quickly your home reaches the set temperature
  • Test each zone if you have a zoned system
  • Observe if the system short-cycles (turns on and off frequently)

Addressing minor issues early prevents major breakdowns when temperatures plummet to single digits during January and February in Salt Lake City.

Upgrade Your Thermostat

If you’re still using an older manual thermostat, upgrading to a programmable or smart thermostat can reduce heating costs by up to 10%. These devices are particularly valuable for Salt Lake Valley residents who experience significant utility bill increases during winter.

Smart thermostats like Nest, Ecobee, or Honeywell models can:

  • Learn your schedule and adjust temperatures automatically
  • Allow remote control via smartphone apps
  • Provide energy usage reports to identify saving opportunities
  • Integrate with other smart home devices
  • Adapt to local weather forecasts

Many Utah energy providers, including Rocky Mountain Power and Dominion Energy, offer rebates for smart thermostat installations, making this upgrade even more affordable.

Clear Space Around Outdoor Units

If your home uses a heat pump system, the outdoor unit needs proper clearance to function efficiently. Before winter, ensure:

  • All vegetation is trimmed back at least 2 feet from all sides
  • Fallen leaves and debris are cleared from the unit and surrounding area
  • The unit is level and hasn’t shifted due to ground settling
  • Protective covers are only used if recommended by the manufacturer (improper covers can cause moisture buildup and damage)

For homes in areas of Salt Lake Valley that receive heavy snowfall, like the Cottonwood Heights or Park City areas, consider installing a protective roof or shelter above (not directly on) the unit to prevent snow and ice buildup while maintaining airflow.

Check Carbon Monoxide Detectors

With heating systems running almost constantly during Utah winters, the risk of carbon monoxide exposure increases. This odorless, colorless gas can be deadly, making functional detectors essential for every Salt Lake home.

Before winter:

  • Test all existing carbon monoxide detectors
  • Replace batteries in battery-powered units
  • Install detectors on every level of your home, especially near bedrooms
  • Consider upgrading to detectors with digital displays that show CO levels
  • Check the manufacture date (most detectors need replacement every 5-7 years)

Green Line technicians can install hardwired carbon monoxide detectors during your pre-winter maintenance visit for added protection.

Insulate and Weatherize Your Home

Even the most efficient heating system will struggle if your home isn’t properly insulated. Focus on these areas to keep warm air in and cold air out:

  • Add attic insulation to reach R-49 value (recommended for Salt Lake Valley’s climate zone)
  • Install weatherstripping around doors and windows
  • Caulk gaps around exterior penetrations like pipes and wires
  • Add door sweeps to exterior doors
  • Consider window insulation film for older, single-pane windows
  • Insulate exposed water pipes to prevent freezing

Utah’s Clean Energy program offers energy assessments and rebates for insulation upgrades, which our team can help you navigate.

Consider Humidification

Utah’s winter air is notoriously dry, with indoor humidity levels often dropping below 20% during heating season (ideal levels are 30-40%). This extreme dryness can exacerbate respiratory issues, cause static electricity problems, and make your home feel colder than it actually is.

Installing a whole-home humidifier connected to your HVAC system offers numerous benefits:

  • Increased comfort at lower temperature settings
  • Reduced static electricity
  • Protection for wood furniture and flooring
  • Relief from dry skin, eyes, and respiratory passages
  • Decreased susceptibility to winter illnesses

Green Line offers several whole-home humidification solutions designed specifically for Salt Lake City’s unique climate conditions.

Emergency Preparation

Despite the best preparations, emergencies can still occur during extreme weather events. Prepare for potential heating system failures by:

  • Keeping emergency heating sources like approved space heaters available
  • Installing ceiling fans to circulate warm air (running clockwise in winter)
  • Knowing how to safely shut off gas supply to your furnace if necessary
  • Having thick blankets and warm clothing easily accessible
  • Storing our emergency service number (801-252-5362) in your phone contacts

For customers enrolled in our maintenance plan, we prioritize emergency service calls during extreme weather events affecting the Salt Lake Valley.

When to Consider System Replacement

If your heating system is over 15 years old or has required frequent repairs, this might be the winter to consider replacement before a complete breakdown occurs. Modern high-efficiency systems can reduce heating costs by 20-40% while providing better comfort and reliability.

Signs it might be time for replacement include:

  • Rising energy bills despite maintenance
  • Uneven heating throughout your home
  • Frequent cycling or constant running
  • Unusual noises or odors
  • Visible rust or cracks in the heat exchanger
  • Yellow pilot light instead of blue (for gas systems)

Green Line offers free replacement consultations and can provide information about available tax credits and rebates for high-efficiency systems.

Frequently Asked Questions

How often should I replace my furnace filter during winter in Salt Lake City?

During winter months, check filters monthly and replace them every 1-3 months depending on use. Homes with pets, children, or near construction may need more frequent replacements due to Salt Lake’s winter inversion that can increase indoor air pollution.

Is it normal for my heating system to smell when I first turn it on for the season?

A brief dust-burning smell when first activating your system is normal and should dissipate within an hour. However, any persistent burning smell, gas odor, or smoky smell requires immediate professional inspection by a licensed Salt Lake Valley HVAC technician.

How much can I save by preparing my HVAC system properly for winter?

Salt Lake homeowners who implement all recommended winter preparations typically see 15-25% reductions in winter heating costs compared to unprepared systems. With Utah’s fluctuating energy prices, this can represent hundreds of dollars in savings over the heating season.

Should I cover my outdoor heat pump unit during winter?

For most Salt Lake Valley installations, manufacturers recommend against covering heat pump units completely as they need proper airflow even during winter operation. Instead, keep the unit clear of snow and ice buildup, and consider a shelter that protects from direct snow while allowing air circulation.

How do I know if my Carbon Monoxide detector is working properly?

Test your detector monthly using the test button. Replace units over 5 years old, as sensors degrade over time. For ultimate protection, Green Line recommends dual smoke/CO detectors with digital displays that can show even low-level CO presence before it reaches dangerous levels.

Local Resources for Salt Lake Valley Residents

Conclusion

Preparing your HVAC system for a Salt Lake Valley winter requires attention to detail but pays dividends in comfort, safety, and energy savings. From simple filter replacements to professional maintenance, each step helps ensure your home remains a warm haven during Utah’s coldest months.

At Green Line Plumbing, Heating and Air, we’ve been helping Salt Lake City homeowners prepare for winter for over 25 years. Our experienced technicians understand the unique challenges our climate presents and can provide customized recommendations for your specific system and home.

Don’t wait until the first snowfall to discover problems with your heating system. Contact Green Line today at 801-252-5362 to schedule your comprehensive winter preparation service, and face the coming cold with confidence knowing your home is ready for whatever winter brings to the Wasatch Front.