Blog - Air Comfort Heating & Air Conditioning

Every fall in Minnesota, there’s a moment that feels almost predictable:

The first frost hits, the thermostat dips into the 40s, and suddenly—everyone across the state turns on their heat at the same time.

And that’s when the calls start flooding in.

Furnaces that haven’t run since spring refuse to fire up. Heat pumps flash error codes. Filters are clogged, blowers squeal, and thermostats stop cooperating. It’s what the HVAC industry calls a heating demand spike—and it happens every October and November without fail.

Why Heating Demand Spikes Happen
Minnesota weather doesn’t ease into fall—it dives headfirst. Temperatures can drop 30 degrees overnight, and when they do, every household system comes back to life simultaneously after months of dormancy.

That sudden demand does two things:

1. Overloads old systems. Dust buildup, worn parts, or weak igniters show their age when the first big cold front rolls in.
2. Overwhelms HVAC schedules. Thousands of homeowners realize they need help—usually all within the same week.

It’s like trying to schedule a snowplow after the first blizzard.

The Hidden Strain on Minnesota Furnaces

When a furnace sits idle through the humid Minnesota summer, internal components—like ignition systems, burners, and blower motors—can corrode or seize up.

The first ignition cycle of the season is when those weaknesses reveal themselves.
Common early-season failures include:

• Faulty igniters or flame sensors
• Clogged filters or blocked air returns
• Dirty burners or heat exchangers
• Malfunctioning thermostats

Add in neglected tune-ups, and those “minor issues” quickly become “no-heat emergencies.”

Why It Pays to Schedule Early

Every year, homeowners who schedule their fall maintenance in September avoid the chaos entirely. By the time everyone else’s furnace quits on a cold November morning, their systems are already tuned, tested, and ready.

Booking early helps:
✅ Prevent emergency breakdowns
✅ Extend equipment life
✅ Reduce repair costs
✅ Guarantee faster service times

At Air Comfort, our phones ring nonstop once the first overnight freeze hits—but our early tune-up customers? They’re already cozy.

What Homeowners Can Do Before Calling

If your furnace hesitates when you turn it on this fall, try these quick steps before panic sets in:

1. Change the filter. A clogged filter can stop a system from igniting.
2. Check the thermostat. Replace batteries and ensure it’s set to “heat.”
3. Inspect the vent intake. Clear leaves, snow, or debris from exterior vents.
4. Listen. Clicking, humming, or constant cycling are warning signs—call before it quits completely.

The Air Comfort MN Advantage
We’ve been through more Minnesota heating seasons than we can count—and we know the pattern well. When that first cold wave hits, we’re ready for the surge.
​
Our Anoka-based team offers:

• Preventive maintenance before demand spikes hit
• Emergency service when your heat quits unexpectedly
• Straightforward communication (no upsell nonsense—just solutions)

If there’s one thing every Minnesota homeowner should know before installing or replacing an HVAC system, it’s this: not all heating and cooling work is created equal — or legal.

Whether you’re adding a new furnace, replacing an air conditioner, or upgrading to a high-efficiency heat pump, permits, licensing, and local codes protect your home, your safety, and your investment. And in a state with subzero winters and humid summers like ours, that protection matters.

1. Why HVAC Licensing Matters

Minnesota HVAC licensing isn’t just paperwork — it’s proof of competence and accountability.

Licensed contractors are trained, tested, and verified by the Minnesota Department of Labor and Industry (DLI) to meet strict safety and performance standards.

Hiring a licensed HVAC professional ensures:

• Your installation meets state and local codes.
• The technician is insured and bonded for liability.
• Your warranty and homeowner’s insurance remain valid.

Unlicensed work can void equipment warranties and even cause fines or property sale complications later on.

2. The Role of Permits in HVAC Projects

Before any furnace, AC, or heat pump install in Minnesota, your contractor should file for a mechanical permit with your city or county.

Why this matters:

• Safety first: Inspectors verify the system meets code and won’t pose fire, gas, or ventilation hazards.
• Efficiency compliance: Many cities follow Minnesota Energy Code standards, ensuring your equipment performs at peak efficiency.
• Peace of mind: A permitted job means your installation was inspected and approved — something that matters when selling or refinancing your home.

If your HVAC company tells you a permit isn’t necessary — that’s your cue to find a new one.

3. How Local Codes Protect Minnesota Homes

Minnesota’s mechanical and energy codes are built around our state’s unique climate challenges.

From frost-depth venting and combustion air requirements to insulation and duct sealing, these codes ensure your system can handle:

• Extreme cold without freezing condensate lines.
• Proper airflow in tightly sealed, energy-efficient homes.
• Safe exhaust of gases in snow or ice conditions.

Ignoring these details can lead to dangerous carbon monoxide leaks, premature system failures, or drastically higher utility bills.

4. Homeowners: Your Role in Code Compliance

Even though contractors handle the permits, homeowners are responsible for making sure the work being done is legal and compliant.

Before signing any contract, always ask:
✅ Are you licensed and insured in Minnesota?
✅ Will you be pulling the required permits for this job?
✅ Will I receive proof of inspection after the work is complete?

An honest HVAC company will answer confidently — and provide documentation upfront.

5. The Air Comfort MN Promise
At Air Comfort Heating & Air Conditioning, every project we take on is done by the book and with integrity.
We’re fully licensed, insured, and locally trusted to install, maintain, and service HVAC systems that meet or exceed Minnesota mechanical and energy codes.

Whether it’s a new furnace in Anoka or a heat pump retrofit in Spring Lake Park, our team handles the details — permits, inspections, safety checks, and everything in between — so you don’t have to.

As Minnesota temperatures drop and furnaces roar back to life, one invisible danger deserves every homeowner’s attention — carbon monoxide (CO). It’s colorless, odorless, and deadly — and every fall, cases of CO leaks spike across the state as heating systems kick on after months of dormancy.

Why Carbon Monoxide Testing Matters
Carbon monoxide is produced anytime fuel burns — natural gas, propane, oil, or wood. When your furnace is properly vented and maintained, CO is safely expelled outside.

But even a small crack in a heat exchanger, a blocked vent, or poor combustion can leak CO directly into your living space.

According to the Minnesota Department of Health, hundreds of residents experience CO poisoning each year — most often in fall and winter. The signs can start subtle:

• Dull headaches
• Dizziness
• Nausea
• Shortness of breath

And because symptoms mimic the flu, many people don’t realize what’s happening until it’s serious.

How Often Should You Test for Carbon Monoxide?

​CO testing should be part of your annual furnace inspection — ideally before the first long stretch of heating season. A professional HVAC technician uses calibrated instruments to measure CO levels and inspect components that could cause leaks, including:

• Heat exchangers
• Burners and pilot assemblies
• Flue and vent systems
• Draft inducers and exhaust fans

Even if your furnace is newer, yearly testing ensures that small issues don’t grow into major hazards.

Do Carbon Monoxide Detectors Replace Professional Testing? Short answer: no — they complement it.
A CO detector alerts you to a leak, but it doesn’t prevent one. Think of detectors like smoke alarms: essential, but reactive. To truly protect your home, pair your detector system with proactive HVAC maintenance and CO testing each fall. Minnesota law requires CO detectors in every home with fuel-burning appliances or attached garages — ideally placed near sleeping areas and each floor level.

Common Causes of Carbon Monoxide Leaks in Furnaces

1. Cracked heat exchanger – Often due to age or corrosion.
2. Blocked exhaust or vent pipe – Caused by leaves, snow, or ice.
3. Incomplete combustion – Dirty burners or incorrect air/fuel mixture.
4. Improper installation – Incorrect venting angles or undersized flue pipes.

Even the best equipment can fail if not maintained — which is why professional inspection is critical before Minnesota’s first deep freeze.

The Air Comfort MN Difference

At Air Comfort Heating & Air Conditioning, safety isn’t an afterthought — it’s the foundation of what we do.
Our certified technicians perform comprehensive CO testing and furnace safety checks for families across Anoka County and beyond. We ensure your system runs cleanly, efficiently, and safely — all season long.

📞 Call (763) 753-6623 to schedule your furnace safety inspection before winter settles in.

The calendar might say fall, but if you’ve lived in Minnesota long enough, you know that the weather plays by its own rules. One week it’s sunny and 75°F, the next it’s frost on the windows and a cold morning coffee dash. Knowing when—and how—to make the switch from cooling to heating isn’t just about comfort. It’s about efficiency, energy savings, and keeping your system ready for whatever this unpredictable state throws your way.
The Magic Number: Around 60°F (Give or Take)Most Minnesota homeowners start turning on their furnace or heat pump when the daily average drops below 60°F—typically late September through mid-October. If your thermostat still reads in the upper 60s during the day, hold off a bit longer. Let nature do the work and open your windows when possible for fresh air circulation.
Before You Flip That Thermostat…Switching over too fast can cause strain on your HVAC system. Here’s what you should check before turning on the heat:
✅ Change your air filter. Dust from a summer of AC use can choke airflow and make your furnace work harder.
✅ Test your system early. Don’t wait for a cold snap—turn it on once before you need it.
✅ Listen for unusual noises or smells. A mild “burnt dust” scent is normal for first-time use. Anything metallic or smoky isn’t.
✅ Clear your furnace vent and exterior intake pipes. Blockages from leaves or debris can cause system lockouts or safety hazards.
Smart Thermostat Tip for FallIf you’ve upgraded to a smart thermostat, set a “comfort schedule” that gradually shifts from cooling to heating over a few days. This saves energy and keeps your home from feeling like a roller coaster.
For example:

• 72°F during the day, 68°F at night in early fall.
• ​Shift to 70°F day, 66°F night as outdoor temps drop.

Why Timing Matters for Energy EfficiencySwitching your HVAC system over at the right time isn’t just about comfort—it’s about cost. Running both AC and heat in the same week can spike your bills.
A controlled transition means your furnace doesn’t have to overcompensate for an unvented, humid home or sudden drops in temperature.
Don’t Forget a Seasonal Tune-UpBefore Minnesota’s first freeze hits, schedule a fall HVAC inspection. A technician will:

• Inspect heat exchangers and burners for cracks or corrosion.
• Test ignition systems and safety controls.
• ​Check airflow, duct balance, and carbon monoxide levels.

Pro tip: Combine your fall heating inspection with a cooling system shut-down check to ensure your AC is winterized correctly.

The Air Comfort Difference
At Air Comfort Heating & Air Conditioning, we’ve seen every kind of Minnesota season—and every kind of thermostat panic. We help homeowners transition smoothly between heating and cooling with honest service, real expertise, and local experience that only comes from decades of keeping Anoka County comfortable.
📞 Call (763) 753-6623 to schedule your fall tune-up before the temps take a dive.

When Minnesota weather flips from chilly mornings to sunny afternoons, your thermostat is the traffic controller of your home comfort. If it’s set incorrectly—or worse, if the batteries are dead—you could be left with a furnace or AC that won’t kick on. A quick DIY check keeps your system running smoothly and avoids unnecessary service calls.

Step 1: Verify Your Thermostat Settings

• Mode Check: Make sure it’s set to Heat when temps dip, Cool in summer, and Auto for year-round balance.
• Fan Setting: Auto helps efficiency, while On keeps air circulating but can raise bills.
• Temperature: DOE recommends 68°F in winter and 78°F in summer for comfort and savings.

Local Tip: In Minnesota’s unpredictable fall, consider using programmable settings to warm the house in the morning and ease off during the day when the sun does some of the work.

Step 2: Change Thermostat Batteries

• Many thermostats run on AA or AAA batteries.
• Change them once a year—a good reminder is every fall when you check smoke alarms.
• Low or dead batteries can make your HVAC act like it’s broken when it’s just your thermostat.

Pro Tip: Keep a pack of fresh batteries in the same drawer as your furnace filter for easy seasonal maintenance.

Step 3: Reset or Calibrate if Needed

• If your thermostat screen is blank even after new batteries, reset it according to the manufacturer’s instructions.
• If rooms don’t feel as warm or cool as the setting suggests, calibration may be needed—something an HVAC pro can do quickly.

When to Call a ProIf your thermostat checks out but your furnace or AC still won’t run, the issue may be in the furnace, wiring, or blower system. That’s when it’s time to call Air Comfort Heating & Air Conditioning.

📞 Call (763) 753-6623 to schedule a service and keep your Minnesota home comfortable through every season.

When winter grips Minnesota, your furnace doesn’t just keep you warm—it keeps your whole home safe. But if filters, fans, or vents are dirty or blocked, your system works harder than it should, leading to higher energy bills, uneven heating, and costly breakdowns.

The good news? A few DIY checks can make a big difference before you call in the pros.

Step 1: Check and Replace Furnace Filters

• Minnesota homes need filter checks every 30 days during heating season.
• Replace every 1–3 months, depending on pets, dust, or allergies.
• A dirty filter reduces airflow, strains the blower motor, and can even cause your furnace to overheat.

Pro Tip: Hold your filter up to the light. If you can’t see through it, it’s time for a replacement.

Step 2: Inspect Furnace Fans

• Listen for unusual humming, squealing, or grinding when the furnace kicks on.
• Look for dust buildup on the fan blades.
• A clean, balanced fan ensures air moves smoothly through your ducts.

Warning: Don’t attempt to lubricate or disassemble without training—leave deeper motor care to licensed Minnesota HVAC techs.

Step 3: Clear and Open Vents & Registers

• Make sure furniture, rugs, or curtains aren’t blocking airflow.
• Wipe away dust or pet hair from vent covers.
• Closed or blocked vents create uneven heating and added pressure on your system.

Local Insight: In older Minnesota homes, poorly placed vents often end up hidden under couches or beds—double-check these areas.

When DIY Isn’t Enough
These checks keep your system efficient, but if airflow feels weak, rooms heat unevenly, or you hear unusual noises, it’s time for a professional inspection. At Air Comfort Heating & Air Conditioning, we provide expert maintenance and repairs to keep Minnesota homes comfortable all winter long.

📞 Call (763) 753-6623 to schedule your furnace check today.

Your HVAC blower is the heart of your system’s airflow—it pushes warm or cool air through ducts to keep your home comfortable. In Minnesota, where summers are humid and winters are brutal, airflow problems can mean uneven comfort, higher bills, and added wear on your system.

When airflow is compromised, even the best furnace or AC can’t deliver results.

Common Blower and Airflow Issues

1. Dirty or Clogged Air Filter

• Restricts airflow and forces the blower motor to work harder.
• Leads to higher energy bills and possible motor failure.

2. Blower Motor Problems

• A failing motor may cause weak or no airflow.
• Signs: unusual humming, grinding, or the system shutting down.

3. Fan Belt or Bearings

• Worn belts or dry bearings can reduce efficiency and airflow.
• These small parts are inexpensive to fix if caught early.

4. Blocked or Leaky Ducts

• Poorly sealed ducts allow air to escape before reaching rooms.
• Minnesota homeowners lose up to 20–30% of conditioned air this way (DOE).

5. Frozen Evaporator Coil (Summer)

• Often tied to poor airflow or low refrigerant.
• Can cause your blower to work overtime with little cooling output.

How to Check Airflow at Home

• Hold your hand over supply vents—do you feel weak airflow compared to other rooms?
• Listen for unusual noises when the blower runs.
• Check filters monthly (especially in dusty summers or during peak heating in winter).
• Inspect vents and registers for blockages (furniture, rugs, or dust).

Why Call Air Comfort in Minnesota
While homeowners can swap filters and clear vents, blower and motor issues require licensed technicians. Ignoring them risks:

• Burned-out motors
• Uneven temps in your home
• Higher utility bills
• Shortened HVAC lifespan

Our team at Air Comfort Heating & Air Conditioning diagnoses blower issues, tests airflow, and ensures your system runs efficiently—so you’re never left sweating in August or shivering in January.

📞 Call us at (763) 753-6623 to schedule service today.

As temps dip below freezing in Minnesota, your furnace becomes the MVP of home comfort. But how do you know it’s running safely and efficiently? Two simple checks—the ignition system and the burner flame color—can reveal a lot about your furnace’s health.

Step 1: Checking the Furnace Ignition
There are two main ignition systems you may encounter:

• Pilot Light Ignition (Older Furnaces):
  • Look for a small blue flame that stays steady.
  • If the pilot goes out frequently, it could be a dirty sensor, draft issue, or failing thermocouple.
• Electronic Ignition (Modern Furnaces):
  • These include hot surface ignitors or spark ignitors.
  • If your furnace fails to light after a few tries, you may hear clicks but no flame—this usually points to a faulty ignitor, dirty burners, or gas flow issues.

⚠️ Warning: Never try to repair ignition parts without training. They involve gas and electrical systems—leave repairs to licensed Minnesota HVAC pros.

Step 2: Checking Burner Flame ColorThe flame color is a big indicator of efficiency and safety:

• 🔵 Blue Flame (Steady): Normal. Indicates proper gas combustion.
• 🔵+ Yellow Tip: Small flicker of yellow at the tip can be okay, but watch for changes.
• 🟡 Yellow/Orange Flame: This signals incomplete combustion. It could mean dirty burners or a serious issue like carbon monoxide risk.
• 🔥 Unsteady Flame: If flames are wavering or lifting, it may mean poor airflow or venting issues.

Why This is Crucial in Minnesota
In tightly sealed Minnesota homes, improper furnace combustion can quickly become a safety issue—particularly with carbon monoxide. That’s why the Minnesota Department of Labor and Industry stresses having a licensed HVAC contractor evaluate irregular flame color or ignition failures.

When to Call Air Comfort

• Furnace doesn’t ignite consistently
• Pilot light won’t stay lit
• Burner flames are yellow/orange
• You notice soot buildup around the furnace

Our technicians diagnose ignition and combustion issues safely and get your system back to running efficiently—all while keeping your family safe.

📞 Call Air Comfort today at (763) 753-6623 to schedule your furnace inspection.

Minnesota Weather Meets Your HVAC Unit
From blowing leaves in the fall to heavy snowdrifts in the winter, Minnesota weather is tough on outdoor HVAC systems. Your outdoor unit (condenser/heat pump) needs airflow to function properly. When it’s buried under leaves, ice, or snow, your system works harder, burns more energy, and risks costly damage.

Why Clearance Matters

✅ Airflow Efficiency
The outdoor unit draws in air to release heat in summer and absorb heat in winter (for heat pumps). Blockages choke airflow, making the system strain.

✅ Preventing Ice Build-Up
Snow piled against the unit can cause ice buildup, which may damage coils, fans, and refrigerant lines.

✅ System Longevity
Consistently clearing debris and snow reduces wear-and-tear and keeps your investment running strong for Minnesota’s extreme seasons.

How Much Clearance Do You Need?

• Year-Round: At least 2–3 feet of space around the unit for airflow.
• Winter: Keep 12–18 inches above the unit clear of snow and ice. If heavy snow is forecast, shovel around your HVAC system just like you would a sidewalk.

Steps for Minnesota Homeowners

1. Fall Cleanup – Remove leaves, sticks, and grass clippings before the snow arrives.
2. Winter Watch – After a storm, clear snow away with a shovel or broom (avoid hitting the unit directly).
3. Keep Vents Clear – Check exhaust vents for furnaces and heat pumps—blocked vents can create dangerous carbon monoxide buildup.
4. No Covers in Winter – While it may be tempting, covering your unit can trap moisture and cause more harm than good.

When to Call a Pro
If your outdoor unit is encased in ice, making unusual noises, or struggling to keep up with demand, it’s time to call Air Comfort. Our team can safely de-ice and inspect your HVAC system to prevent further damage.

Stay Ahead of Winter HVAC ProblemsSimple tasks like clearing snow and debris around your unit can save you from unexpected breakdowns and high energy bills. For complete peace of mind, schedule a seasonal tune-up with Air Comfort.

📞 Call us at (763) 753-6623 to get your system winter-ready.

Why the Blower Motor Matters in Minnesota Homes

Your blower motor is the heart of your HVAC system—it’s what pushes warm air through your home in winter and cool air in summer. When it’s running smoothly, you get:

• Even airflow across every room
• Lower energy bills thanks to less strain on the system
• Longer system life with fewer unexpected repairs

But when your blower motor isn’t maintained, you’ll notice weak airflow, noisy operation, and higher utility bills—something no Minnesota homeowner wants during extreme temps.

How to Inspect a Blower Motor
⚠️ Safety First: Always turn off power to your furnace or air handler before working on your system.

Step 1: Access the Blower Compartment

• Remove the furnace or air handler’s access panel.
• Locate the blower motor assembly—typically near the bottom of the unit.

Step 2: Look and Listen for Warning Signs

• Dust buildup: Can clog moving parts and reduce efficiency.
• Loose belts or mounts: May cause rattling or squealing noises.
• Burnt smell or discoloration: Could indicate overheating.

Step 3: Check Motor Operation
If safe, restore power briefly to listen for odd sounds (grinding, squealing, or humming). Shut off power again before moving on.

Lubricating Moving Parts
Some blower motors are permanently sealed and don’t require lubrication. If yours does, follow these steps:

1. Locate the Oil Ports – Usually found on the motor housing, sealed with small caps.
2. Use Proper Oil – Only use non-detergent, lightweight oil (typically SAE 20).
3. Apply Sparingly – Add just a few drops into each port—over-lubricating can cause damage.
4. Reassemble & Test – Replace caps, close the access panel, and restart the system.

When to Call a Minnesota HVAC Pro
While DIY inspection and light lubrication are possible, some signs mean you should call a professional:

• Weak or no airflow despite a clean filter
• Blower motor not starting or shutting down unexpectedly
• High-pitched squeals or grinding sounds
• Motor overheating or tripping breakers

Air Comfort’s licensed technicians can inspect, clean, and service blower motors as part of a seasonal tune-up—ensuring your system is ready for Minnesota’s hot summers and freezing winters.

Keep Your HVAC System Running Smoothly
Routine blower motor inspection and lubrication help your system last longer, run quieter, and save money on energy bills. Pair this with regular filter changes and seasonal HVAC maintenance to keep your Minnesota home comfortable year-round. 

📞 Call Air Comfort Heating & Air Conditioning at (763) 753-6623 to schedule your tune-up today.