Furnace Repair

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Residential Furnace Repair

You can trust our team at Paragon Mechanical, Inc. to safely handle all of your furnace repair needs.

Whether your heating system is aging or a victim of corrosion, repair is often a necessity. Our team will work with you until your system is, once again, running smoothly and efficiently. Our team of specialists are proficient in serving a multitude of brand manufacturers such as Trane, Carrier, Bryant, Lennox, and Armstrong. Your heating comfort and safety are our main concerns. Here at Paragon Mechanical, Inc. we will keep you warm through the coldest parts of winter in Chicago.

Your Furnace Repaired Quickly

In need of a furnace repair? We understand how busy our customers are! You can expect a fast response time from the Paragon service team. Once you’ve scheduled an appointment, we prioritize our response time to exceed your expectations. Our crews have continuous communication with the home office so we are able to know when they arrive, the nature of the issue, and how long it will take them to resolve the problem. Our goal is to provide you with a “first-time” fix.

Our Extensive Training And Education On Furnace Repair Makes The Difference

Keeping our service technicians up-to-date on the latest repair techniques is paramount for our business. We provide continuous education for our staff both in-house and by manufacturing representatives. We make certain that our team is skilled in the latest technological advances. To assure that team remains top in their field for furnace repair, Paragon delivers 18 hours of continuous training to our service personnel each month. We believe we are only as good as our team, keeping them current in diagnostic repair of heating systems is foremost in our business plan. Contact Paragon Mechanical, Inc. today, call 847-321-9428, for all of your furnace repair needs.

Open home furnace just ready for cleaning and repair
Handyman replaces a furnace filter with a clean one

Common Problems

Unusual Noises

If you hear strange noises coming from your furnace, this could indicate imminent part failure or debris in the system. Call Paragon immediately to avoid loss of heating.

Fan Only

If you notice that cool air is being circulated throughout your home when the thermostat is making a “call for heat,” this could indicate that only the system fan is functioning, and the furnace has failed to ignite. Call Paragon immediately to diagnose and repair this common furnace problem.

Power Cycling

With smart thermostats like the Nest Learning Thermostat and Ecobee becoming more prevalent in homes throughout the Chicagoland area, so have problems associated with their unique wiring needs. If you notice your furnace frequently turning on and off, call Paragon immediately as your thermostat may be wired incorrectly or your furnace control board might be failing.

Water Leaking

If you notice water on, inside, or around your furnace, it may be indicative of a humidifier or condensate problem which can lead to furnace failure if water contacts the electrical components of your furnace. Call Paragon immediately if you see water near your furnace.

Attempts But Fails to Start

If you notice your furnace attempting to start before immediately shutting off, this is indicative of a problem with the furnace’s ignition process. Do not continue trying to start the furnace as excessive gas will be supplied to the device. Call Paragon immediately if your furnace fails to start.

Cool Air Blowing

If you notice the air coming through the supply vents/registers is room temperature or cold, this means the system fan is working as expected but the furnace has failed to ignite. Please turn the system off immediately and call Paragon if you notice cold air is being supplied to your home.

Blank Thermostat

If you notice your thermostat screen is blank or unresponsive, please first check to see if it has replaceable batteries. Older thermostats require infrequent battery replacement and the solution might be simple. If you have a smart thermostat like the Nest or Ecobee, this could mean it was installed incorrectly, it could indicate the furnace control board has failed, or it could indicate the system has lost power or tripped a breaker. Call Paragon right away if you encounter a blank thermostat and the batteries have been replaced.

Power Loss

If you discover that your furnace has lost power, please first check to see if the furnace light switch has been mistakenly turned off or if the furnace access doors are improperly seated. Both common mistakes can result in the “No Power to RH” error code on the Nest thermostat. If the switch is on and the doors are properly secured, this could indicate a larger problem with the furnaces electrical system. Call Paragon if the simple checks do not restore power to your furnace.

Customer Experiences

“These guys arrive faster than Jimmy Johns!”

Mickey H.
Northbrook, IL

“I have never been so happy with a contracting company; they were on-time, very clean and neat and delivered everything that was promised.”

John D.
Itasca, IL

Expertise & Availability


Furnace Problems Fixed


Furnace Training Hours


Repeat Customers


Furnace Parts on Truck


Furnace Parts in Stock


Furnace Part Availability

Dispatch Locations

  • Arlington Heights, IL
  • Elmhurst, IL
  • Hinsdale, IL
  • Naperville, IL
  • Oak Park, IL
  • Lincoln Park, Chicago
  • Northbrook, IL
  • Glenview, IL
  • Winnetka, IL
  • Highland Park, IL
  • Lakeforest, IL
  • Barrington, IL

Manufacturers Serviced

Armstrong Air
American Standard