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Maintenance & controls

Furnace Maintenance and Heating Tune-Ups

Arrange a heating maintenance visit for your Hillside, IL home.

Request service Call (708) 673-5633
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SquareHVAC technician testing a furnace with a combustion analyzer

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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.

Smell gas? Leave the building and call your gas company first. Then call us.

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

Read the furnace and AC filter guide

Quick checks before you call

  • Check the thermostat: is it set to heat, and is the set point above the room temperature?
  • Check the filter: a clogged filter limits airflow. Replace it if it is visibly dirty.
  • Check the power: look at the breaker and the switch on or near the furnace.
  • Check the furnace door: the front panel must be fully closed for the furnace to start.
  • Check the airflow: hold a hand at a supply register and feel whether warm air is moving.

Signs to call us about

  • A furnace that starts and stops again every few minutes.
  • A breaker that trips repeatedly whenever the system starts.

Winters here are unforgiving. When temperatures drop below freezing, the last thing you need is a furnace failure in the middle of the night. A heating maintenance visit before the cold season helps find problems early, while they are still small. SquareHVAC is based in Hillside and serves communities within approximately 30 road miles.

A maintenance visit is a single bookable appointment. There is no membership, no contract and no recurring plan.

Clean filter being changed in a Heil gas furnace in a residential utility alcove

What a heating maintenance visit includes

A maintenance visit goes beyond a quick filter change. We check the critical components of your heating system.

Between visits, our boiler winter maintenance checklist lists what a homeowner can do safely, and the furnace filter guide explains filters in clear language.

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

Furnace inspection and cleaning

What the technician checks, cleans and tests on the visit:

  • Combustion analysis and safety testing
  • Heat exchanger inspection for cracks or damage
  • Burner cleaning and adjustment
  • Gas connection and pressure testing
  • Carbon monoxide safety verification
  • Blower motor and belt inspection
  • Electrical connection tightening and testing
  • Thermostat calibration and testing
  • Filter replacement and airflow assessment

Why heating maintenance matters

  • A dirty system works harder and uses more energy
  • Minor issues can become major failures
  • The safety testing protects your family: gas furnaces produce carbon monoxide as a byproduct of combustion, and a cracked heat exchanger or blocked flue can leak it into your home

Heating systems we service

  • Gas furnaces high-efficiency and standard models
  • Boilers hot water and steam systems
  • Heat pumps dual heating and cooling systems

How a maintenance visit works

  1. Step 1

    System assessment.

    The technician evaluates your heating system, notes its condition and identifies any immediate concerns.

  2. Step 2

    Cleaning and calibration.

    We clean burners, inspect the heat exchanger, lubricate moving parts and calibrate controls.

  3. Step 3

    Safety testing.

    Combustion analysis, carbon monoxide testing and gas leak detection.

  4. Step 4

    Findings.

    We explain what we found and what we recommend. If a repair is needed, we provide a written quote for approval before work begins.

  5. Step 5

    Your next visit.

    Call us when you want to book it. There is no membership and no contract.

More services and guides

Common questions about heating maintenance

How often should my heating system be serviced?
Once a year, ideally in early fall before the heating season begins. For heat pumps used for both heating and cooling, a visit in spring and another in fall is recommended.
Can I perform maintenance myself?
Homeowners should change filters regularly and keep vents clear. The rest needs specialized tools and training: gas connections, electrical components and combustion chambers are dangerous without them.
What if my system breaks down between maintenance visits?
Call us. We aim to arrive within 2 hours from the time you call, depending on the distance to your location and current availability. Emergency service is available 24/7, including Sundays. Non-emergency visits outside routine service hours are scheduled for the next working period.

Service area

Areas we serve

We serve Hillside and communities within approximately 30 road miles.

All service areas

Next step

Request furnace maintenance

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