The Ultimate Year-Round HVAC Guide for Sioux Falls Homeowners

Sioux Falls puts your HVAC system through more in a single year than equipment in many parts of the country sees in two. We swing from −30°F wind chills in January to 100°F-plus heat indexes in July. We get spring storms that drop temperatures 40 degrees overnight. We get fall snow in October and tornado warnings in May. Your heating and cooling equipment is asked to handle all of it — quietly, efficiently, and without breaking down.

The homeowners who keep their HVAC running smoothly aren't lucky. They follow a year-round maintenance rhythm that matches what their equipment actually needs in each season. This guide is that rhythm — month by month, season by season — so you can stay ahead of problems instead of reacting to them.

Spring: The Cooling System Wake-Up

March

• Replace your furnace filter one more time as heating season winds down
• Walk around your outdoor AC unit and clear any debris that piled up over winter
• Note the date — you'll want a professional cooling tune-up before May

April

• Schedule your annual AC tune-up. This is the most important spring task. Pre-season service is dramatically cheaper than emergency service in July.
• Test your AC briefly on a 65°F+ day. Listen for unusual noises and confirm cold air at the registers
• Check thermostat batteries and consider upgrading to a programmable or smart model if you haven't
• Inspect outdoor unit fins for damage from winter weather, lawn equipment, or pets

May

• Switch your fan setting from "on" to "auto" if you've been running it constantly — this reduces wear and saves energy during cooling season
• Clean supply and return registers throughout the house
• Verify all registers are open and unblocked by furniture
• Treat condensate drain lines if your tune-up tech didn't already
• Test CO detectors and replace batteries

Summer: The Cooling Season Marathon

June

• Replace your filter at the start of the month — cooling-season dust loads can be heavy
• Trim back vegetation around the outdoor unit (24 inches clear on all sides, five feet overhead)
• Check that the outdoor unit is level — frost heaving can tilt the pad over winter, which stresses refrigerant lines

July

• Replace filter again if your home is dusty or has pets
• Watch for ice buildup on refrigerant lines outside (a sign of low charge or airflow restriction — call us immediately)
• Listen for changes in operating noise — buzzing, grinding, or new vibrations are early warning signs
• If your home isn't cooling evenly, address it now rather than next year. Often the fix is straightforward — duct adjustment, register balancing, or thermostat relocation

August

• Hottest stretch of the year — verify outdoor unit isn't being smothered by overgrown landscaping
• Hose down the outdoor coil fins gently (with the power off) to remove cottonwood seed, pollen, and grass clippings
• Check that your attic temperature isn't extreme — over 140°F means your insulation and ventilation aren't doing their job, and you're paying extra to cool the ceiling below

Fall: The Heating Season Pre-Flight

September

• Replace filter as you transition seasons
• Schedule your annual furnace tune-up now. By mid-October our schedule is booked 2–3 weeks out. Don't wait.
• Test the furnace briefly on a cool morning — confirm warm air, listen for ignition issues, watch for short cycling
• Move stored items away from the furnace (three-foot clearance, no chemicals or flammables nearby)

October

• Drain and shut off any exterior hose bibs to prevent freeze damage
• Cover the outdoor AC unit's top only (full covers trap moisture and invite rodents) or leave uncovered — modern units are designed for outdoor exposure
• Inspect outdoor furnace venting (the PVC pipes on high-efficiency units) — they should be clear of obstructions, vegetation, and bird nests
• Test every smoke and CO detector in your home
• Reverse ceiling fans to clockwise rotation to push warm air down from the ceiling

November

• Replace humidifier pad if you have a whole-home humidifier, and turn the humidistat on
• Target indoor humidity 35–45%
• Walk every room and verify supply vents are unblocked by furniture, rugs, or drapes
• Program your thermostat for heating season — setback while sleeping or away saves real money

Winter: Survive and Save

December

• Replace your filter at the start of the month
• After every snowstorm, brush snow away from outdoor furnace vent pipes — blocked venting is the #1 cause of high-efficiency furnace lockouts
• Keep your thermostat at a steady temperature when possible; massive swings cost more energy than steady-state operation

January

• Continue checking outdoor venting after every storm
• Replace filter again if your home runs heavy on dust
• If you notice any unusual furnace behavior — cold air from registers, strange noises, repeated short cycling — call before it becomes an emergency
• Verify humidity levels (35–45% target). Too low irritates lungs and damages wood; too high causes window condensation and mold risk

February

• Replace filter
• Inspect attic for signs of ice damming (icicles along the eaves are an early warning) — these indicate heat loss into the attic and poor ventilation
• If utility bills are unusually high, consider a winter energy audit. The fixes are usually cheaper than the ongoing waste

The Five HVAC Tasks Worth Doing Every Year, No Matter What

1. Two professional tune-ups per year — one for cooling in spring, one for heating in fall
2. Filter replacement on schedule — typically every 1–3 months depending on filter type and home conditions
3. CO detector testing — monthly button tests, annual battery replacement, full unit replacement every 5–7 years
4. Outdoor unit clearing — keep vegetation, snow, leaves, and debris well clear of the condenser and venting
5. Humidity monitoring — a $15 hygrometer pays for itself in comfort and equipment protection

Long-Term Investments That Pay Off

Beyond seasonal maintenance, certain longer-horizon decisions dramatically improve year-round comfort and reduce operating costs:

Smart thermostat

Typically pays for itself in 1–2 years through smarter scheduling alone. Modern models also integrate with whole-home humidifiers, ventilators, and variable-speed equipment for sophisticated comfort control.

Upgraded filtration

Moving from a 1-inch fiberglass filter to a 4–5 inch media filter (MERV 11–13) captures dramatically more contaminants while reducing the static-pressure burden on your blower. Lasts 6–12 months between changes.

Whole-home humidifier

Sioux Falls winters can drop indoor humidity below 20% without supplementation. A bypass or fan-powered humidifier integrated with your furnace ductwork keeps the home comfortable, protects woodwork and instruments, and reduces respiratory irritation.

Indoor air purification

Active systems like the HALO-LED proactively neutralize pathogens, allergens, and odors throughout the home. Particularly valuable for households with allergies, asthma, young children, or elderly family members.

Energy recovery ventilator (ERV)

Modern homes are sealed tightly for efficiency, which traps stale air, CO₂, and VOCs. An ERV brings in filtered fresh air while recovering 70–80% of the energy from outgoing air — fresh air without the energy penalty.

The Cost of Skipping Maintenance: A Sioux Falls Reality Check

Every winter we get the call: "My furnace just stopped working." Often, the diagnosis is something that would have been caught — and fixed for a fraction of the cost — at the previous fall tune-up. A few common examples:

• Failed inducer motor: Often shows wear at tune-ups. $40 capacitor at service. $700 motor replacement when it fails at 11 p.m. on a Tuesday.
• Dirty flame sensor: 5-minute cleaning at service. Two-hour emergency call when the furnace locks out repeatedly.
• Cracked heat exchanger: Caught on annual inspection. Catastrophic if missed.
• Refrigerant leak: Caught early at AC tune-up, repaired for a few hundred dollars. Caught late after compressor failure, often a full system replacement.

An average homeowner who skips maintenance pays roughly 2.5x more in lifetime HVAC costs than one who maintains diligently. The math isn't close.

Building a Relationship With Your HVAC Contractor

HVAC is one of the few home systems where ongoing relationship genuinely matters. A technician who knows your equipment, your home, and your family's preferences provides better service than a different technician every time you call. They catch things faster. They know what's normal for your home. They have history on the equipment.

This is why Foley's invests heavily in customer continuity. Our service plans aren't designed to generate maintenance revenue — they're designed to keep our customers from ever needing emergency service. We'd rather know your furnace inside and out than meet you for the first time during a January breakdown.

The Foley's Year-Round Approach

We treat every customer as a long-term relationship, not a transaction. When you call us, you get a local Sioux Falls team, licensed technicians, honest pricing, and a 12-month workmanship guarantee on everything we install or repair.

Our maintenance plans bundle both spring and fall tune-ups at a discount and include priority service during peak seasons. Most importantly: we answer the phone. Sioux Falls weather doesn't wait for business hours, and neither do we.

Get on the Calendar

The single best thing you can do for your HVAC system this week is schedule the next tune-up. Call 605.610.1840 or request service online and we'll get you on the calendar before the season's rush. Your future self — and your future utility bills — will thank you.