HVAC Repair, Maintenance & Service FAQ

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How does New Comfort Heating and Cooling stand out from other HVAC service providers?

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How can I tell if my HVAC system requires maintenance?

What are the benefits of smart control for HVAC systems?

What factors can affect the lifespan of an HVAC system?

Is installing a modern HVAC system expensive?

What should I do if my HVAC system is not cooling or heating effectively?

More HVAC Service Questions From Local Homeowners

The answers above cover the HVAC service questions we hear most often. Below, our technicians go a step further with practical answers about HVAC maintenance, HVAC repair, scheduling and indoor air quality for homes in Justice and Chicago’s western and southwest suburbs. If your question is not here, call us at (708) 717-9995 and a real person will help.

HVAC Maintenance Questions

What happens during an HVAC maintenance visit?

A furnace tune-up typically includes inspecting the burners, ignitor and flame sensor, checking the heat exchanger and venting, testing safety controls, checking the blower and reviewing the air filter. An air conditioner tune-up includes cleaning the outdoor coil, checking refrigerant pressures, testing the capacitor and electrical connections and clearing the condensate drain.

At the end of the visit, the technician tells you what was checked, what looks good and anything that may need attention soon. You decide what, if anything, to do next. An HVAC maintenance visit is also a good time to ask about any noises, smells or comfort problems you have noticed.

Technician cleaning an outdoor AC condenser coil in Palos Park IL, a frequent topic in HVAC service questions about maintenance

Is a tune-up worth it if my system seems fine?

Yes, in most cases. Many problems, such as a weak capacitor, a dirty flame sensor or a partly clogged drain line, give little warning before they cause a breakdown. Annual HVAC maintenance catches these issues early, helps the system run more efficiently and is often required to keep a manufacturer’s warranty valid.

When is the best time to schedule HVAC maintenance?

Book furnace maintenance in early fall, before the first cold nights, and air conditioning maintenance in spring, before the first hot and humid stretch. Scheduling ahead of the busy season gives you more appointment options and means any needed repairs are done before you depend on the system every day.

What can I do myself between maintenance visits?

  • Check the air filter monthly and replace it when it looks gray or dusty.
  • Keep the outdoor unit clear of leaves, grass clippings and snow, with about two feet of open space around it.
  • Keep supply and return vents open and free of furniture, rugs and drapes.
  • Glance around the furnace and indoor coil for water or rust, especially during the cooling season.
  • Test smoke and carbon monoxide detectors twice a year.

Leave electrical, gas and refrigerant work to a professional. Those parts of the system can be dangerous and are easy to damage without the right tools.

HVAC Repair Questions

What are the most common HVAC repairs?

In local homes, the HVAC repair calls we see most often involve a handful of parts that wear out over time:

  • Capacitors and contactors that help the AC compressor and fan motor start
  • Ignitors and flame sensors that let a gas furnace light and stay lit
  • Clogged condensate drains that cause water leaks or shut the system down
  • Refrigerant leaks that lead to poor cooling or ice on the coil
  • Blower motors that move air through the furnace and ductwork
  • Thermostat problems, including wiring issues and dead batteries

Gas furnace with PVC venting installed in a closet during HVAC repair and installation work in Downers Grove IL

How do I know if an HVAC repair is urgent?

Call right away if you have no heat in freezing weather, no cooling during extreme heat, water leaking near the equipment, a burning or electrical smell, or a system that trips the breaker repeatedly. If you smell gas or your carbon monoxide alarm sounds, leave the home and call your gas utility or 911 from outside first.

Less urgent signs, such as a new noise, higher energy bills or one room that is always uncomfortable, still deserve attention. Small problems tend to get more expensive the longer they run.

Can I handle HVAC repair work myself?

Changing a filter, resetting a tripped breaker or replacing thermostat batteries are safe tasks for most homeowners. Beyond that, HVAC repair usually involves natural gas, high-voltage electricity or refrigerant, which federal rules require certified technicians to handle. A wrong move can create a safety hazard or turn a small HVAC repair into a much larger one, so it is best to call a professional.

Why does my furnace or AC keep turning on and off?

Short cycling can come from a dirty filter, a thermostat in a poor location, an overheating furnace, a refrigerant problem or equipment that is too large for the home. It wears out parts faster and wastes energy, so it is worth having a technician find the cause.

Should I repair or replace my system?

Age, repair history and repair cost all matter. Furnaces commonly last 15 to 20 years and air conditioners 10 to 15 years with good care. If an older system needs a major repair, or you are calling for HVAC repair every season, a replacement estimate is worth comparing. We will always tell you honestly when a repair still makes more sense. Our article on furnace repair vs. replacement explains the decision in more detail.

New central air conditioner condenser on a pad beside a brick home after an AC replacement in La Grange IL

Questions About Scheduling an HVAC Service Call

Do you offer same day and emergency service?

Yes. We offer 24/7 live phone answering and same day service, and our emergency HVAC service covers nights, weekends and holidays when you have no heat or no cooling.

Will I know the price before work begins?

Yes. After diagnosing the problem, the technician explains what needs to be done, why it is needed and what it will cost. No work starts until you approve it.

Do you offer estimates and financing for new equipment?

We provide free estimates for new furnace, air conditioner and system installations, and financing options are available. During the estimate we look at your home, your ductwork and any comfort problems so the new equipment fits the way you live.

What information should I have ready when I call?

Your address, the type and approximate age of your system, and a short description of what is happening, such as noises, smells, error codes or water. That is all we need to get started.

Indoor Air Quality Questions

Why does my home feel so dry in winter?

Cold outdoor air holds very little moisture, and heating it makes indoor air even drier. Dry air can cause static shocks, dry skin and cracked wood floors. A whole-home humidifier connected to your furnace adds moisture evenly, and it should be serviced once a year along with the furnace.

Which air filter should I use?

The right filter balances filtration with airflow. A higher-efficiency pleated filter traps more dust and allergens, but a filter that is too restrictive for your system can reduce airflow. Ask our technician what your equipment can handle. For more background, the EPA offers a helpful overview of indoor air quality in the home.

Can duct problems make some rooms uncomfortable?

Yes. Leaky, undersized or poorly balanced ductwork is a common reason for rooms that are always too hot or too cold. Solutions range from balancing dampers and sealing leaks to zoning systems that control different areas separately.

Two new furnaces and updated ductwork in a finished basement after a furnace replacement in Burr Ridge IL

Seasonal HVAC Service Questions for Chicago-Area Homes

How should I prepare my system for winter?

Schedule furnace maintenance before the heating season, put in a fresh air filter and test your carbon monoxide detectors. Turn the heat on for a short test run on a cool fall day, so you find out about any problem before the first hard freeze rather than during it. If you have a humidifier, replace the water panel and open its damper for the winter.

What should I do with my air conditioner in winter?

Clear leaves and debris from around the outdoor unit and make sure snow and ice from the roof cannot fall directly on it. A breathable cover over the top only can keep debris out, but avoid wrapping the whole unit in plastic, which traps moisture. If you have a heat pump, leave it uncovered, since it runs through the winter.

Is it normal for my furnace to run almost constantly on very cold days?

During a deep cold snap, long run times can be normal, especially in older or less insulated homes. The warning signs are a house that never reaches the set temperature, rooms getting colder over time or air from the vents that feels lukewarm. Those symptoms point to a problem with airflow, the burners or the equipment size, and they are worth a service call.

How do I get my AC ready for summer?

Book an AC tune-up in spring, change the filter, clear plants and debris from around the condenser and make sure the condensate drain is not clogged. Turn the cooling on during a warm spring afternoon to confirm it is blowing cold air. Finding a problem in April is far easier than waiting for the first heat wave, when HVAC service schedules fill up quickly.

Why is my home humid even with the air conditioning running?

An air conditioner removes moisture as it cools, but an oversized system can cool the house too quickly and shut off before it dries the air. Low airflow, a dirty coil or a fan set to run constantly can also leave the home feeling clammy. A technician can check the settings, airflow and equipment size to find the cause.

Still Have HVAC Service Questions?

We are always happy to talk through a problem before you book a visit. Browse more answers on our HVAC FAQ page, learn about our heating services and cooling services, or check the areas we serve. When you are ready, call (708) 717-9995 or contact us online to schedule HVAC maintenance, HVAC repair or a free estimate.