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Air conditioning

Air Conditioning Repair

Air conditioning repair for Hillside, IL and the Chicago suburbs.

Request service Call (708) 673-5633
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SquareHVAC technician testing an outdoor air conditioner with a meter and refrigerant gauges

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Choose your next step

What should you do next?

Not sure if you need service now or can wait? Use these signs to choose a practical next step. Talking through what your system is doing does not commit you to an appointment.

See smoke, flames or signs of a fire? Leave the building, stay out and call 911. If there is no fire and it is safe to use the controls, switch the system off and call SquareHVAC.

Emergency service is available 24/7, including Sundays.

Urgent

Call now

For smoke or flames, leave the building, stay out and call 911. Call us for water leaking from equipment, or if the system has stopped and the quick checks below did not help.

Call (708) 673-5633

Within a few days

Request service soon

Arrange a visit when rooms are uneven, performance has changed, or the system repeatedly needs attention.

Send a service request

No rush

Monitor and plan

If your air conditioner is working normally, follow its routine care schedule and plan a visit when needed. If new symptoms appear, request service sooner.

Read the AC maintenance guide

Quick checks before you call

Before you call

  • The thermostat is set to Cool and the batteries are fresh.
  • The air filter is clean.
  • The breakers for the indoor and the outdoor unit are on.
  • Nothing blocks the outdoor unit or the vents inside.

Care between visits

  • Look at the filter once a month and change it when it is dirty.
  • Keep leaves, grass and stored things away from the outdoor unit.
  • Keep the vents open and uncovered.
  • Arrange a maintenance visit in spring, before the first hot days.

Safety. If the system still does not cool, or if you see ice on it, switch the cooling off and call us. Running an iced system can damage it.

Signs to call us about

Common cooling problems we fix

  • Refrigerant leaks from corrosion in older units
  • Clogged drain lines in high humidity
  • Overworked compressors after years of hard running
  • Thermostat malfunctions from power surges or age
  • Frozen evaporator coils from restricted airflow

When the cooling stops, you want the problem found and explained, not a guess. SquareHVAC is based in Hillside and serves communities within approximately 30 road miles. We diagnose and repair air conditioning problems for homes and businesses across the Chicago suburbs and surrounding communities.

Older Goodman condenser tested with two service leads while the meter sits beside the pad

Repair or replacement

Whether to repair or replace depends on the age of the system, what failed and how often it has failed before. We explain both options and what each involves, and you decide. Our guide on what HVAC repair costs and what drives the price explains the main points.

The written quote

We explain what we found and what it costs, in writing, with parts and labor listed separately. You review it; you decide. Work only begins once you approve.

All services

What AC repair covers

  • Diagnosis. We test the system and find the cause, not just the symptom.
  • Component replacement. Motors, capacitors, contactors, fans and refrigerant leaks.
  • Thermostat checks. Calibration and settings so the system runs when it should.
  • Urgent cooling failures. Call when the cooling stops. We aim to arrive within 2 hours from the time you call, depending on the distance to your location and current availability.

What happens during the visit

  1. Step 1

    Request

    You call or send a request, and we confirm the time of the visit.

  2. Step 2

    Inspection

    The technician inspects the system and finds the cause of the problem.

  3. Step 3

    Explanation

    We explain the issue and your repair options in clear language.

  4. Step 4

    Written quote

    We provide a written quote for approval before work begins, with parts and labor listed separately.

  5. Step 5

    Approved work

    We complete the approved work and check that the system runs properly. If we find additional work after approval, we stop, explain it, supply the added cost in writing and obtain approval before continuing.

More services and guides

Common questions about air conditioning repair

Are you open on weekends?
Emergency service is available 24/7, including Sundays. Routine visits are Monday to Friday from 6:00 AM to 8:00 PM and Saturday from 8:00 AM to 5:00 PM. Non-emergency visits outside routine service hours are scheduled for the next working period.
Do I need to be home during the repair?
Yes. Someone needs to let the technician in and show them which rooms or equipment are affected.
Do you repair systems in commercial buildings?
Yes. We service commercial buildings: offices, retail shops, restaurants and apartment buildings, with rooftop units and split systems.

Service area

Areas we serve

We serve Hillside and communities within approximately 30 road miles.

All service areas

Next step

Request AC repair

Tell us what is happening at your property. We will arrange a visit, explain what we find and give you a written quote with parts and labor listed separately. Nothing starts until you say go.

Request service Call (708) 673-5633