Serving Cook County and beyond
Furnace Repair Company Cook County
When your furnace starts acting up, immediate action is crucial to ensure your home stays warm and safe. Intelligent Service specializes in prompt, effective furnace repair services that address everything from minor issues to major malfunctions.
Give Intelligent Service a call for furnace repairs if your furnace is short-cycling or making strange sounds, your utility bills have increased unexpectedly, you’ve noticed a bad smell coming from your furnace, or your furnace won’t turn on at all. Intelligent Service’s skilled furnace repair technicians diagnose problems quickly and deliver solutions that last, ensuring your furnace operates efficiently when you need it most.
Experience the difference with Intelligent Service’s reliable furnace repair services by calling (847) 393-0853 today.
Cook County Furnace Repair Call for More Information Today!847-393-0853
Geo was professional and courteous. He explained everything he performed in detail.
Varg James
G"Highly recommend this company"
Very kind, knowledgeable, and informative
Grace Adair
S"This company is amazing."
I have had nothing but fantastic customer service.
Sandra
S"This company is amazing."
They are honest, upfront with costs, and communicate very well.
Sandra
B"Quick and clean service."
Quick and clean service. Nice and informative.
Brian Mills
B"Quick and clean service"
Quick and clean service. Nice and informative.
Brian Mills
V"The service person was friendly and knowledgeable."
The service person was friendly and knowledgeable about the inspection. They answered all my questions clearly.
Vera Murphy
P"Great! Did a routine maintenance for our 2002 Furnace!"
Great! Did a routine maintenance for our 2002 furnace! Great work.
Paul Wandtke
P"Great Work"
Did a routine maintenance for our 2002 furnace!
Paul Wandtke
R"Very professional and fast service."
Very professional and fast service. They got my furnace working within an hour. I am very satisfied with the service.
Reynaldo Nacion
R"Very Professional and Fast Service"
They got my furnace working within an hour.
Reynaldo Nacion
A"Intelligent Plumbing truly saved the day for us!"
They responded quickly, diagnosed the issue efficiently, and got everything running smoothly again.
Arun
T"Felix very nice and knowledgeable."
Felix very nice and knowledgeable. He tested everything in the system.
Todd Fink
T"Felix very nice and knowledgeable"
Felix very nice and knowledgeable.
Todd Fink
E"Trevor was fantastic"
Trevor was fantastic and addressed our concerns.
Elizabeth Gonzalez
R"Trevor was a pleasure to have"
Trevor was knowledgeable, professional, kind, and so positive.
Rosalie Martinez
R"Trevor was a pleasure"
He was knowledgeable, professional, kind, and so positive.
Rosalie Martinez
M"Intelligent Service Exceeds Five Stars"
Intelligent Service exceeds five stars. Consummate professional—patiently and understandably explained the service.
Michele Olsen
M"Intelligent Service Exceeds Five Stars"
In view of their commitment to work excellence and "stellar" customer service, Intelligent Service exceeds five stars.
Michele Olsen
A"He showed what needed to be replaced and explained everything."
He did not try to sell me something I didn’t need; he showed what needed to be replaced and explained everything.
Arlene M.
A"The service tech, Cory Snyder, was awesome."
He was very kind and patient; he answered all my questions.
Arlene M.
M"My furnace is back up and running! Yay!"
Colin diagnosed and fixed my furnace in a professional and efficient manner. He answered my questions very patiently.
Mary Stoddard
M"My Furnace Is Back Up and Running!"
Colin diagnosed and fixed my furnace in a professional and efficient manner.
Mary Stoddard
E"Highly recommend! Very quick to come out"
Wonderful customer service. Cory replaced a couple parts for my furnace/ac units and did excellent work.
Erica Rios
E"Highly recommend!"
Very quick to come out for a problem. Wonderful customer service.
Erica Rios
D"Good service explained what needed to be done."
Good service explained what needed to be done. Cleaned up. I will use again.
Donna Williams
H"He is thorough to make sure that I understand"
Cory is always very professional and never leaves me with any questions.
Hope Platis
H"Cory is always very professional"
He is thorough to make sure that I understand exactly what he has done or what he will need to do.
Hope Platis
B"I will go nowhere else for plumbing, A/C, and furnace issues."
I found this company a few years ago and will go nowhere else for plumbing, A/C, and furnace issues.
Bill Seifert
B"I Will Go Nowhere Else"
Colin explains things clearly so I can understand what’s going on.
Bill Seifert
Geo was professional and courteous
Geo was professional and courteous. He came to perform a tuneup service for the furnace. He exudes confidence. He explained everything he performed in detail. I will definitely consider their service in the future.
Varg James
Highly recommend this company
Felix did a furnace tune-up. Arrived on time. Very kind, knowledgeable, and informative. Explained everything to me. Cleaned up when done. Not pushy. Highly recommend this company.
Grace Adair
This company is amazing.
This company is amazing. I have had nothing but fantastic customer service. They are honest, upfront with costs, and communicate very well. I recently called them out to service my furnace and it was a very quick fix and it cost nothing.
Sandra
This company is amazing.
This company is amazing. I have had nothing but fantastic customer service. They are honest, upfront with costs, and communicate very well. I recently called them out to service my furnace and it was a very quick fix and it cost nothing.
Sandra
Quick and clean service.
Got a standard furnace maintenance. Quick and clean service. Nice and informative. Did not feel like I was getting a major upsell.
Brian Mills
Quick and clean service
Got a standard furnace maintenance. Quick and clean service. Nice and informative. Did not feel like I was getting a major upsell.
Brian Mills
The service person was friendly and knowledgeable.
The service person was friendly and knowledgeable about the inspection. They answered all my questions clearly. I’ll have them out to check the furnace this fall.
Vera Murphy
Great! Did a routine maintenance for our 2002 Furnace!
Great! Did a routine maintenance for our 2002 furnace! Great work.
Paul Wandtke
Great Work
Great! Did a routine maintenance for our 2002 furnace! Great work.
Paul Wandtke
Very professional and fast service.
Very professional and fast service. They got my furnace working within an hour. I am very satisfied with the service.
Reynaldo Nacion
Very Professional and Fast Service
Very professional and fast service. They got my furnace working within an hour. I am very satisfied with the service.
Reynaldo Nacion
Intelligent Plumbing truly saved the day for us!
Intelligent Plumbing truly saved the day for us! On one of the coldest days of the year, our furnace was barely working, and we were starting to worry. They responded quickly, diagnosed the issue efficiently, and got everything running smoothly again. We’re so grateful for their help and highly recommend them to anyone in need of HVAC services!
Arun
Felix very nice and knowledgeable.
Felix very nice and knowledgeable. He tested everything in the system, could not find the problem but ruled out some issues I questioned in furnace.
Todd Fink
Felix very nice and knowledgeable
Felix very nice and knowledgeable. He tested everything in the system, could not find the problem, but ruled out some issues I questioned in furnace.
Todd Fink
Trevor was fantastic
Trevor was fantastic and addressed our concerns regarding a plumbing issue with our furnace.
Elizabeth Gonzalez
Trevor was a pleasure to have
Trevor was a pleasure to have to come and service our furnace and humidifier. He was knowledgeable, professional, kind, and so positive.
Rosalie Martinez
Trevor was a pleasure
Trevor was a pleasure to have come and service our furnace and humidifier. He was knowledgeable, professional, kind, and so positive.
Rosalie Martinez
Intelligent Service Exceeds Five Stars
I have been an Intelligent Service customer since December 2017. In view of their commitment to work excellence and “stellar” customer service, Intelligent Service exceeds five stars. Co-owners Neal Deacon and Jason Kerr go above and beyond to ensure any concerns are addressed and corrected to customer satisfaction. More accurately, Neal and Jason are committed to exceeding customer expectations. Today (October 25, 2022), I received outstanding furnace maintenance service from Corey Snyder. Consummate professional—patiently and understandably explained the service. No pressure for additional services. Five stars for Corey Snyder!
Michele Olsen
Intelligent Service Exceeds Five Stars
I have been an Intelligent Service customer since December 2017.
In view of their commitment to work excellence and "stellar" customer service, Intelligent Service exceeds five stars.
Co-owners Neal Deacon and Jason Kerr go above and beyond to ensure any concerns are addressed and corrected to customer satisfaction. More accurately, Neal and Jason are committed to exceeding customer expectations.
Today (October 25, 2022), I received outstanding furnace maintenance service from Corey Snyder. Consummate professional - patiently and understandably explained the service. No pressure for additional services.
Five stars for Corey Snyder!
Michele Olsen
He showed what needed to be replaced and explained everything.
The service tech, Cory Synder, was awesome. He was very kind and patient. He answered all my questions. He did not try to sell me something I didn’t need. He showed what needed to be replaced and explained everything. I most definitely will be calling in the fall for the furnace. I will also be telling all my friends about your company. Arlene M
Arlene M.
The service tech, Cory Snyder, was awesome.
The service tech, Cory Snyder, was awesome. He was very kind and patient; he answered all my questions. He did not try to sell me something I didn’t need; he showed what needed to be replaced and explained everything. I most definitely will be calling in the fall for the furnace. I will also be telling all my friends about your company.
Arlene M
Arlene M.
My furnace is back up and running! Yay!
Colin diagnosed and fixed my furnace in a professional and efficient manner. He was able to use parts he had on his truck. Got them in and did the work very quickly. He answered my questions very patiently. I appreciate his knowledge and service. My furnace is back up and running! Yay!
Mary Stoddard
My Furnace Is Back Up and Running!
Colin diagnosed and fixed my furnace in a professional and efficient manner. He was able to use parts he had on his truck. Got them in and did the work very quickly. He answered my questions very patiently. I appreciate his knowledge and service. My furnace is back up and running! Yay!
Mary Stoddard
Highly recommend! Very quick to come out
Highly recommend! Very quick to come out for a problem. Wonderful customer service. Cory replaced a couple parts for my furnace/ac units and did excellent work. Thoroughly explained everything, made sure work area was clean when finished, and went above and beyond to do perfect work. Very glad I found this company!
Erica Rios
Highly recommend!
Highly recommend! Very quick to come out for a problem. Wonderful customer service. Cory replaced a couple of parts for my furnace/AC units and did excellent work. Thoroughly explained everything, made sure the work area was clean when finished, and went above and beyond to do perfect work. Very glad I found this company!
Erica Rios
Good service explained what needed to be done.
Good service explained what needed to be done. Cleaned up. I will use again. It's time to buy a furnace.
Donna Williams
He is thorough to make sure that I understand
Cory is always very professional and never leaves me with any questions. He is thorough to make sure that I understand exactly what he has done or what he will need to do. He was able to finally figure out what we needed to do with our two-stage furnace and hopefully we will have a much warmer winter than last year.
Hope Platis
Cory is always very professional
Cory is always very professional and never leaves me with any questions. He is thorough to make sure that I understand exactly what he has done or what he will need to do. He was able to finally figure out what we needed to do with our two-stage furnace, and hopefully we will have a much warmer winter than last year.
Hope Platis
I will go nowhere else for plumbing, A/C, and furnace issues.
Colin just did a furnace tune-up but explains things clearly so I can understand what’s going on. I found this company a few years ago and will go nowhere else for plumbing, A/C, and furnace issues.
Bill Seifert
I Will Go Nowhere Else
Colin just did a furnace tune-up but explains things clearly so I can understand what’s going on. I found this company a few years ago and will go nowhere else for plumbing, A/C, and furnace issues.
Offer covers arrival of technician and diagnostic of HVAC system. Additional diagnostics and costs may apply if extensive investigation is necessary. Must be in the immediate service area.
Cannot be combined with any other offers or discounts. Coupons must be presented at time of payment. Not valid for trip charge or diagnostic fee. Valid on standard pricing only. Redeemable for on-time use per home.
Valid
Jun 1, 2026
- Jul 31, 2026
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Why Choose Intelligent Service
At Intelligent Service, we’ve been keeping Northwest Chicago homes safe, comfortable, and efficient since 1979. From plumbing emergencies to heating and cooling upgrades, we combine modern technology with old-fashioned, neighborly care. Our licensed team focuses on honest guidance, transparent pricing, and solutions that truly fit your home and budget.
Why Choose Us:
Trusted local experts since 1979
Licensed, highly trained technicians
Transparent, upfront pricing with no surprises
24/7 emergency plumbing and HVAC service
Genius Club membership with perks and guarantees
Flexible financing for larger repairs and replacements
24/7 Emergency Heating & Cooling
Round-the-clock HVAC repairs to keep your home safe and comfortable.
Trusted HVAC Care Since 1979
Decades of expert heating and cooling for Northwest Chicago homes.
Genius Club Comfort Protection
Priority HVAC service, discounts, tune-ups, and a forever guarantee.
Honest, Upfront HVAC Pricing
Clear estimates, no hidden fees, and options that fit your budget.
Your Questions, Answered
Can I perform furnace repair myself?
Simple tasks like changing filters can be done by homeowners, but most repairs require specialized knowledge. Attempting complex repairs can be dangerous, so it's recommended to hire a professional.
Is it better to repair or replace my furnace?
This depends on the age and condition of your furnace. If it's over 15 years old or repairs are frequent and costly, replacement may be more cost-effective. Our team can help assess your situation.
Are your technicians certified?
Absolutely. All our technicians are fully certified and trained to handle a wide range of furnace issues. They have the experience and expertise to provide quality repairs.
What should I do if my furnace stops working?
First, ensure the thermostat is set to heat and the circuit breaker is not tripped. If these settings are correct and the furnace still doesn't work, contact us for a professional inspection.
FREE Second Opinion on HVAC Repair or Replacement