Same-Day Furnace Services in the Greater Chicago Area

Trusted Furnace Experts Serving Chicago Since 1973

While winters in the Chicago area often bring picturesque snowfall, they also bring freezing temperatures that can put any heating system to the test. That’s why homeowners across Chicago and the North Shore turn to Cahill Heating, Cooling, Electric, Plumbing & Sewer for reliable, expert furnace service in Chicago.

Whether you need a routine furnace tune-up, emergency furnace repair, or a complete furnace replacement, our team has the tools and training to keep your system running efficiently. With over 50 years of experience servicing all makes and models of furnaces, including gas and high-efficiency systems, we deliver dependable comfort, fast.

Keep your home warm and cozy by calling Cahill today at (847) 367-4492 to schedule furnace services.

24/7 Emergency Furnace Services

If your furnace has suddenly stopped working, there’s no need to panic — help is just a call away. The Cahill Heating, Cooling, Electric, Plumbing & Sewer team provides 24/7 furnace repairs in Chicago to restore warmth and comfort to your home when you need it most. We understand that heating emergencies don’t wait for business hours, which is why our experienced, background-checked technicians are always ready to respond — day or night, weekends, and even holidays.

Your Local Furnace Repair Experts

Furnaces are an essential part of your home comfort, so it’s important to address any concerns quickly. At Cahill, we provide same-day furnace repairs to get your furnace back up and running in no time. Our team works on all makes and models of gas and electric furnaces, and we have extensive experience repairing a wide range of furnace issues. No matter the furnace problem you’re dealing with, our technicians are bound to have the top-quality solution you deserve.

Signs Your Furnace Needs Repairs

Knowing when to schedule furnace repairs is key to keeping your system efficient, reliable, and safe. Small issues can quickly escalate into costly breakdowns—especially during Chicago’s freezing winters—so it’s important to act early. If you notice any of the following warning signs, it may be time to call Cahill Heating, Cooling, Electric, Plumbing & Sewer for professional furnace service in Chicago:

1. Insufficient Heat

If your furnace is running but your home never seems to warm up, it could be a sign of a failing heating element, thermostat issue, or ductwork leak. Cahill’s technicians can quickly pinpoint the cause and restore full heating performance.

2. Low Airflow

Weak airflow from your vents often indicates a clogged filter, blower motor issue, or duct obstruction. Reduced airflow not only affects comfort but also puts extra strain on your furnace, shortening its lifespan.

3. Cool Air Coming from Vents

When your furnace blows cold instead of warm air, it’s often due to a malfunctioning pilot light, gas valve issue, or damaged heat exchanger. Our experts will inspect and repair the problem safely to restore proper operation.

4. Uneven Heating

Cold spots in certain rooms could mean your furnace isn’t distributing heat evenly. This might stem from ductwork leaks, thermostat zoning issues, or system sizing problems—issues Cahill can assess and correct efficiently.

5. Odd Noises (Banging, Buzzing, or Rattling)

Unusual furnace sounds are never normal. Banging or clanking might signal loose components, while buzzing could point to an electrical issue. Our technicians can identify and fix the source before it leads to a complete breakdown.

6. Unexplained Increases in Energy Bills

If your energy costs are climbing but your usage hasn’t changed, your furnace could be losing efficiency due to dirty components or mechanical wear. A professional tune-up or repair from Cahill can help restore efficiency and lower your bills.

7. Yellow Pilot Light

A healthy pilot light should burn blue. If it’s yellow or flickering, it could indicate a carbon monoxide or gas combustion problem—both serious safety concerns. Call Cahill immediately for inspection and repair.

8. Visible Rust or Corrosion

Rust on the furnace cabinet or components can indicate moisture problems or age-related deterioration. Left unchecked, this can compromise performance and lead to leaks or cracks in the heat exchanger.

9. Frequent On-Off Cycling

If your furnace keeps turning on and off rapidly (short cycling), it could be caused by a dirty filter, faulty thermostat, or improper system size. This constant cycling wastes energy and stresses your system.

Furnace Installation & Replacement

When it’s time for a furnace replacement, look no further than the Cahill team! By choosing us as your furnace contractor, you’re ensuring you receive top-quality products and workmanship. We are a proud Lennox dealer, so you can have peace of mind that we are installing a reliable, energy-efficient furnace that will provide you with unmatched comfort and a long life span.

When To Replace Your Furnace

While we all wish our furnaces could last forever, even the best-maintained units have to be replaced eventually. To make sure you’re ready when the time comes, you should start planning for a furnace replacement if:

• Your furnace is 15+ years old
• You frequently need furnace repairs
• Your furnace is inefficient and expensive to run
• Your furnace isn’t keeping your home comfortable

Preventative Furnace Maintenance & Tune-Ups

To ensure you get the most out of your furnace, you need to keep up with regular maintenance. At Cahill, we provide comprehensive furnace maintenance services that will ensure your furnace is in the best shape possible. When you schedule your routine furnace tune-up with us, our factory-trained technicians will thoroughly inspect and tune your furnace to help improve its energy efficiency, prolong its life span, and enhance your family’s comfort.

If it’s been over a year since your last furnace tune-up, call Cahill at (847) 367-4492 to schedule maintenance in the Chicago area.

When it comes to furnace service in Chicago, homeowners have trusted Cahill Heating, Cooling, Electric, Plumbing & Sewer for more than five decades. As a local, family-owned and operated company founded in 1973, Cahill has built its reputation on integrity, reliability, and true dedication to customer comfort.

Our team isn’t just skilled — we’re your neighbors. We understand the challenges that come with Chicago’s unpredictable winters, and we take pride in delivering dependable, high-quality HVAC solutions that keep families safe and comfortable all season long. Every technician on our team is licensed, insured, and background-checked, ensuring your home is in professional, trustworthy hands.

Cahill stands out because we combine old-fashioned customer care with modern HVAC expertise. Whether you need an emergency furnace repair in the middle of the night or a routine maintenance visit to prepare for winter, we offer same-day and 24/7 emergency service to restore your heat quickly and effectively. Our technicians arrive promptly, respect your home, and provide transparent, upfront pricing — no surprises, just results.

Call Cahill at (847) 367-4492 to schedule furnace repairs, maintenance, or installations in the Greater Chicago area.

Furnace FAQs