Question 1

When is the best time to schedule heating maintenance?

Accepted Answer

Fall is ideal — before the heating season begins. This gives you time to address any issues found during the tune-up before you need the system.

Question 2

Is a cracked heat exchanger dangerous?

Accepted Answer

Yes. A cracked heat exchanger can allow carbon monoxide to leak into your living space. We check for this during every heating maintenance visit and will advise you of any safety concerns immediately.

Question 3

Do you offer maintenance agreements?

Accepted Answer

Yes. Our maintenance agreement covers annual furnace and AC tune-ups with priority scheduling and discounts on repairs and parts.

Question 4

Can a clogged filter cause my furnace to blow cold air?

Accepted Answer

Absolutely. A severely clogged filter restricts airflow across the heat exchanger, causing it to overheat and trip the high-limit safety switch. When that happens, the burners shut off but the blower keeps running, pushing unheated air through your vents. Replacing the filter every 1–3 months is the single easiest thing you can do to prevent furnace problems.

Question 5

What causes a whistling sound from my furnace?

Accepted Answer

Whistling is almost always an airflow issue — a clogged filter, closed or blocked return vents, or undersized ductwork forcing air through tight spaces. Check your filter first and make sure all vents and returns are open and unobstructed by furniture. If the whistling persists with a clean filter, the ductwork may need modification or the blower speed may need adjustment.

Question 6

Why does my furnace smell musty?

Accepted Answer

A musty or moldy smell usually comes from the ductwork, not the furnace itself. Moisture in your ducts — especially in Asheville homes with crawlspaces — creates an environment for mold and mildew growth. The furnace blower then pushes that musty air through every room. A duct inspection and professional cleaning, combined with addressing the moisture source, will resolve it.

Question 7

How often should a furnace flame sensor be cleaned?

Accepted Answer

We clean the flame sensor during every annual tune-up — once a year is sufficient for most homes. If your furnace starts the pattern of lighting then shutting off within 5–10 seconds between tune-ups, the flame sensor likely needs cleaning sooner. It takes about 10 minutes with fine emery cloth or steel wool and is included in our standard maintenance visit.

Question 8

Can a furnace leak carbon monoxide?

Accepted Answer

Yes — any gas furnace with a cracked or corroded heat exchanger can leak carbon monoxide into your home. This is why every home with a gas furnace should have CO detectors on every level and outside sleeping areas. Annual furnace maintenance includes a heat exchanger inspection and combustion analysis to catch cracks before they become dangerous. It's the most important reason to keep up with yearly tune-ups.

Question 9

How often should I change my furnace filter?

Accepted Answer

For standard 1-inch filters, change them every 30–90 days depending on whether you have pets, allergies, or a dusty home. Four-inch media filters last 6–12 months. A dirty filter is the number one cause of furnace problems we see — it restricts airflow, causes overheating, increases energy bills, and accelerates wear on the blower motor. When in doubt, pull it out and hold it up to light — if you can't see through it, replace it.

Question 10

What MERV rating filter should I use in my furnace?

Accepted Answer

For most residential furnaces, a MERV 8–11 filter is the sweet spot — it captures dust, pollen, and pet dander without restricting airflow. MERV 13 and above filters are great for air quality but can strain older furnaces that weren't designed for that much resistance. Never use a MERV 13+ filter without confirming your system can handle it — restricted airflow from an overly aggressive filter causes more problems than it solves.

Question 11

How long does a furnace last?

Accepted Answer

A well-maintained gas furnace typically lasts 15–20 years, with some lasting up to 25 years. The heat exchanger is usually the component that determines end of life — once it cracks, the furnace needs replacement. Regular annual maintenance, clean filters, and proper sizing at installation are the biggest factors in reaching the upper end of that lifespan.

Question 12

How often should a furnace be serviced?

Accepted Answer

Every furnace should be professionally serviced once a year, ideally in the fall before heating season starts. Annual maintenance includes cleaning the burners and flame sensor, inspecting the heat exchanger for cracks, checking gas pressure and combustion efficiency, testing safety controls, lubricating the blower motor, and verifying thermostat calibration. Homes that skip annual maintenance see 2–3 times more emergency breakdowns.

Question 13

What does a furnace tune-up include?

Accepted Answer

Our furnace tune-up includes a 20+ point inspection: cleaning and adjusting burners, testing ignition and safety controls, cleaning the flame sensor, inspecting the heat exchanger with a mirror and camera, checking gas pressure with a manometer, measuring temperature rise, testing CO levels, inspecting the flue and venting, lubricating moving parts, checking the blower and belt, and testing thermostat operation. It takes about 60–90 minutes.

Question 14

When should I schedule fall furnace maintenance?

Accepted Answer

Schedule your fall furnace tune-up in September or early October, before the first cold snap hits Asheville. Waiting until November means you're competing with every homeowner whose furnace just failed on the first cold night. Early fall scheduling gives you priority, ensures any needed repairs are done before you actually need heat, and often comes with off-season pricing.

Question 15

How do I winterize my furnace?

Accepted Answer

Replace the air filter, clear any items stored within 3 feet of the furnace, check that all vents and returns throughout the house are open and unblocked, test the thermostat by setting it 5 degrees above room temperature and confirming the furnace starts and heats, and make sure your CO detectors have fresh batteries. Then schedule your professional tune-up — that covers the internal components you can't safely inspect yourself.

Question 16

How do I know if my furnace is leaking carbon monoxide?

Accepted Answer

You often can't tell without a CO detector — carbon monoxide is odorless and colorless. Warning signs include yellow or flickering burner flames (should be steady blue), soot or scorch marks around the furnace, excessive condensation on windows, and family members experiencing headaches, dizziness, or nausea. Install CO detectors on every level of your home and outside sleeping areas, and have your furnace inspected annually.

Question 17

How can I prevent emergency furnace breakdowns?

Accepted Answer

Annual professional maintenance is the single best prevention — 80% of the emergency calls we get could have been caught during a routine tune-up. Beyond that, change your filter regularly, keep vents and returns clear, and don't ignore early warning signs like strange noises, weak airflow, or longer run times. A furnace rarely fails without giving you warning signs first.

Question 18

How do I prepare my HVAC system for winter in Asheville?

Accepted Answer

Start with a professional furnace tune-up in September or October. Replace the air filter, test the thermostat, check CO detectors, clear debris from around outdoor equipment, and insulate exposed ductwork in crawlspaces and attics. Asheville's mountain climate can drop into the teens and single digits in January and February, so your heating system needs to be ready for sustained cold.

Question 19

Can bad ductwork affect my furnace's performance?

Accepted Answer

Absolutely — ductwork is the delivery system for your heated air, and if it's leaking, crushed, disconnected, or undersized, even the best furnace can't keep your home comfortable. We see homes losing 25–40% of their heated air through duct leaks in crawlspaces and attics. Sealing and insulating ductwork is one of the most cost-effective upgrades you can make to improve comfort and lower bills.

Question 20

Do you offer furnace maintenance plans?

Accepted Answer

Yes — our annual maintenance plans include a fall furnace tune-up and spring AC tune-up, priority scheduling, discounted repair rates, and no overtime charges on emergency calls. Plan members also get a 15% discount on parts and labor for any needed repairs. It's the most cost-effective way to keep your system running efficiently and catch small problems before they become expensive emergency breakdowns.

Question 21

How often should I get an HVAC tune-up?

Accepted Answer

We recommend twice a year — once in spring to prep your AC for summer and once in fall to prep your heating system for winter. A system that gets regular maintenance runs more efficiently, breaks down less often, and lasts 5–7 years longer than a neglected one. Most manufacturer warranties also require annual professional maintenance to stay valid.

Question 22

What's included in an HVAC tune-up?

Accepted Answer

Our tune-ups include checking and tightening electrical connections, cleaning the condensate drain, checking refrigerant charge and pressures, inspecting the heat exchanger or coils, testing safety controls, lubricating moving parts, checking thermostat calibration, and measuring airflow and temperature differential. We also check your filter and let you know if your ductwork has any obvious issues.

Question 23

Can I do my own HVAC maintenance?

Accepted Answer

You can handle the basics: change your filter every 1–3 months, keep the outdoor unit clear of debris and vegetation (2 feet of clearance all around), make sure your condensate drain isn't clogged, and keep supply and return vents unblocked. But the technical stuff — checking refrigerant charge, testing electrical components, inspecting the heat exchanger, and cleaning the evaporator coil — requires professional tools and training.

Question 24

What type of air filter should I use for my HVAC system?

Accepted Answer

For most residential systems, we recommend a MERV 8–11 pleated filter — it catches dust, pollen, and pet dander without restricting airflow too much. MERV 13+ filters are great for air quality but can reduce airflow in systems not designed for them, causing the evaporator coil to freeze. If you want higher filtration, talk to us about whether your system can handle it or if a whole-house air purifier is a better fit.

Question 25

How often should I change my HVAC air filter?

Accepted Answer

Standard 1-inch filters should be changed every 30–90 days depending on your household — homes with pets, allergies, or heavy dust need monthly changes. If you have a 4-inch or 5-inch media filter, those typically last 6–12 months. A clogged filter is the number one cause of preventable HVAC breakdowns — it restricts airflow, causes the system to overheat or freeze, and runs up your energy bill.

Question 26

What do MERV ratings mean for air filters?

Accepted Answer

MERV (Minimum Efficiency Reporting Value) measures how well a filter captures particles. MERV 1–4 catches only large debris. MERV 8 catches dust, pollen, and mold spores. MERV 11 adds pet dander and smog. MERV 13+ catches bacteria and some viruses but requires a system designed for the extra resistance. Higher isn't always better — if the filter is too restrictive for your system, it causes more harm than good.

Question 27

What should I do to prepare my furnace for winter?

Accepted Answer

Schedule a fall tune-up that includes a heat exchanger inspection, change your filter, test your carbon monoxide detectors, and make sure nothing is stored against or on top of the furnace. If you have a heat pump, clear any leaves or debris from the outdoor unit. We recommend getting your heating system checked by October in WNC — our schedule fills up fast once the first cold snap hits the mountains.

Question 28

Are HVAC maintenance plans worth the money?

Accepted Answer

For most homeowners, yes. Our maintenance plans include two annual tune-ups, priority scheduling, a discount on repairs, and no overtime charges — typically saving $200–400/year compared to paying for everything individually. More importantly, regular maintenance catches small problems before they become expensive failures. We've seen countless systems in the Asheville area that could have avoided a $1,500 repair with a $150 tune-up.

Question 29

How often should evaporator and condenser coils be cleaned?

Accepted Answer

The condenser coil (outdoor unit) should be cleaned annually — cottonwood fluff, grass clippings, and pollen coat the fins and block airflow. The evaporator coil (indoor unit) should be inspected annually and cleaned as needed, typically every 2–3 years. Dirty coils reduce system capacity by up to 30% and are a leading cause of compressor failure. Both coils are included in our maintenance tune-ups.

Question 30

Why is my HVAC system not as efficient as it used to be?

Accepted Answer

Efficiency naturally declines with age — a system loses about 5% of its efficiency for every year of missed maintenance. Common efficiency killers include dirty coils, clogged filters, refrigerant leaks, worn blower motors, and duct leaks that have developed over time. If your system is over 10 years old and energy bills are climbing, a maintenance visit can often recover some of that lost efficiency, but at some point replacement becomes the better investment.

Question 31

What happens if I skip HVAC maintenance for a few years?

Accepted Answer

Skipping maintenance leads to a cascade of problems: the filter clogs, airflow drops, the coil gets dirty, the system works harder, components wear out faster, and efficiency plummets. We regularly see systems that could have lasted 18–20 years fail at 10–12 years because they were never serviced. The repair that finally prompts the call is often a compressor or heat exchanger failure — the two most expensive components in your system.

Question 32

Can my HVAC system cause carbon monoxide poisoning?

Accepted Answer

Gas furnaces and boilers can produce carbon monoxide if the heat exchanger is cracked, the flue is blocked, or combustion is incomplete due to improper gas pressure or a dirty burner. This is why annual furnace inspections are so critical — we check the heat exchanger for cracks and test combustion gases every time. Every home with gas appliances should have CO detectors on every level, and we strongly recommend replacing them every 5–7 years.

Question 33

Where should I place carbon monoxide detectors in my home?

Accepted Answer

Install CO detectors on every level of your home, in hallways near bedrooms, and within 15 feet of any gas-burning appliance (furnace, water heater, gas fireplace). Mount them at outlet height or follow the manufacturer's instructions — CO mixes with air, so placement height matters less than proximity to sleeping areas and gas appliances. If a CO detector goes off, evacuate immediately, call 911, and do not re-enter until cleared by the fire department.

Question 34

What causes dry air in my home during winter?

Accepted Answer

Winter air in Western NC is naturally dry, and heating it further drops the relative humidity — often below 30% indoors, which causes dry skin, static electricity, cracked woodwork, and increased susceptibility to respiratory illness. A whole-house humidifier installed on your duct system adds controlled moisture to maintain 35–45% relative humidity throughout your home. It's a simple add-on that makes a big difference in winter comfort.

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