Mini Split Repair & Tune-Up Services

Chicagoland's AC Repair Experts are a Call Away

We Have You Covered for all Mini Split Repair Needs

As more Illinois home have taken invested in ductless mini split heat pumps, there has been an increasing need for professional repair capabilities. At Harmonic Heating & Air Conditioning, we have over a decade experience and the factory training needed to professional repair any brand of advanced mini split heat pumps.

If your DuPage or Wills County, IL HVAC system is not running properly, reach out to us now. Our EPA certified, licensed, and factory-trained team of heat pump technicians guarantee on time done right rock start service.

Why Choose Harmonic?

Repair & Maintenance for all Mini Split Makes & Models
Locally Owned and Operated in Naperville
Flexible Financing Options
Extensive Maintenance Plans
Harmonic is your local air conditioner replacement expert!
Schedule your AC estimate with Harmonic today.
AC installation services are just a call or click away.

Common Mini Split Service Issues

Improper installation is the most common cause of mini split heat pump failures. We know how efficient and comfortable a ductless heat pump system can be, but if it's improperly sized, or improperly installed, they can disappoint. Service issues can include:

    Issues caused by improper installation:

  • Improper zone sizing: If an indoor unit is too small it will fail to properly heat or cool in extreme weather. If it is too big, it will cycle on its lowest output and fail to properly dehumidify.
  • Condensation Leaks: caused by indoor units installed out of level, or crimped or obstructed condensate lines.
  • Refrigerant Loss: due to improper installation or mechanical damage. This will result most commonly in reduced system capacity over time in the first year or two after installation

    Issues caused by lack or maintenance or component failure:

  • Dirty indoor or outdoor coils:
  • Changes in heating or cooling capacity over time.
  • Noisy operation indoors
  • Noisy outdoor unit may indicate a motor, compressor, or reversing system failure.
  • Outdoor unit fails to start may be cause by improper wire or breaker sizing, a tripped fuse, or failed outdoor component.
  • Indoor zone fails to start may be caused by loose or defective control wiring, or obstructed or failed IR receiver.

Book Your Repair

Rock Star Ductless Heat Pump Maintenance Program

If your mini-split heat pump is fine today but you want more peace of mind, consider our Rock Star seasonal maintenance program. Either one or twice a year, we’ll schedule a complete system check to ensure your system is ready for the cooling or heating season.

If you’re considering a new mini-split heat pump system, we offer free estimates for new system installations. Click here for our details on our Mitsubishi mini split systems.

Is it Time for a Mini Split Heat Pump Pro?

Each spring and fall, we arrive on more than a few ductless heat pump repair calls only to find that the fix was a simple one that could have been resolved by the owner. Check out these things and you might save both time and money:

After checking these items, if your mini split heat pump is still off or running improperly call us and we’ll dispatch a service tech to help. We always go the extra mile for every customer!

Get Started

    Power Supply:

  • Check your circuit breaker for your outdoor unit to ensure that you have not had a nuisance trip and your heat pump system does have power.
  • Check the outdoor disconnect typically mounted next to your outdoor unit to ensure that it is "ON".

    Check your systems controls:

  • Check the battery in your hand held remotes and replace them now.
  • Make sure that at least one zone is set to "ON" and the desired temperature is set well below ambient for cooling operation, or well above ambient for heating.
  • If you are operating in the heat mode, make sure that your system is not in “Defrost” mode. If it is wait a few minutes for your system to complete its defrost cycle.
  • If your breaker was off, after turning the power on, give it a few minutes: many systems have a built-in time delay.

    If your system operating, but not performing properly:

  • Check your indoor unit filters. If your filters have not been cleaned lately, clean them now.
  • If you're heating, make sure your outdoor unit is free of snow or ice.

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