Serving Fort Collins and beyond
Furnace Repair Company Fort Collins
When your furnace starts acting up, immediate action is crucial to ensure your home stays warm and safe. Allen Service specializes in prompt, effective furnace repair services that address everything from minor issues to major malfunctions.
Give Allen 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. Allen 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 Allen Service’s reliable furnace repair services by calling (970) 431-6574 today.
Fort Collins Furnace Repair Call for More Information Today!970-431-6574
Sam Criswell did a thorough inspection and tuning up of our furnace.
Kelby Cotton
R"Top notch furnace inspection visit"
Sam was the most thorough and knowledgeable HVAC professional that I have ever met.
Rob Smith
d"Sam was excellent"
He did a thorough inspection and answered all my questions.
dwight podgurski
R"Highly recommended"
She was very professional and clearly competent with her work.
Robert Gotshall
S"Brandon Freed Came to Our Rescue"
He was polite, professional, and knowledgeable.
Stephanie P
C"We Cannot Recommend Him Enough"
Justin Adams was our technician and we cannot recommend him enough.
Cameron French
H"Excellent job on my furnace maintenance"
Jeremy Bowman did an excellent job and was on time, cheerful, and professional.
Helen M
K"Did a Good Job on My Furnace Repair"
Justin was very cordial and polite.
Karli K
A"An Exemplary Employee"
He’s an exemplary employee with a great work ethic and heart.
Alexandra Massey
K"You Guys Are the Best!"
He was very kind, patient, caring, and thorough.
Kathy Ellingson
E."Friendly and Professional at All Times"
Zack performed maintenance and repair of my furnace as part of my contract with Allen. He was friendly and professional at all times.
E. D. Ryckeley
M"He Went Above and Beyond"
Cole went above and beyond to explain what was happening and get the correct parts needed.
Marcia Johnson
C"Wealth of Knowledge"
Cole was very professional, kind, and a great problem solver.
Connie Nieves
B"Very thorough inspection of the furnace"
Service rep was very conscientious.
Blake Catterall
c"Excellent Service Sam C."
What a great service tech! Professional, courteous, friendly, laughs at my silly jokes, educated me on my furnace concerns.
c green
S"Very satisfied with the price and service"
We have purchased several major systems and have been very satisfied with the price and service.
Sandee Hill
W"Justin is very knowledgeable and capable"
Justin is very knowledgeable and capable in his servicing of my three furnaces.
William Steigers
L"He Is an Awesome Employee"
He was knowledgeable and very thorough.
Laura Adema
V"Justin did a great job."
Justin came to our home to inspect our furnace and found that some items needed replacing.
Vickie S
M"Justin Adams Did an Excellent Job"
He did such a good job it looked like new.
Mike Newkirk
M"Zack was friendly and courteous"
Zack was friendly and courteous. Took many pictures to show me how my furnace was doing and not doing.
Marcia Johnson
J"Very Efficient and Professional"
Justin was very efficient and professional.
Judith Szeszycki
K"Vincent Was Great"
On time, professional, and had the part I needed to fix my furnace in his truck!
Karen Young
E"Great experience with technician Justin Adams"
Great experience with technician Justin Adams.
Elisha Kukich
E"Charlie helped me out with the furnace"
Charlie helped me out with the furnace.
Estee Fraitag
S"Courteous and Knowledgeable Service"
Cole took time to explain why we were receiving the error code on our furnace.
Sandra Brown
T"Cole Was Very Thorough"
He explained everything and completed a repair that will keep my furnace running for as long as possible.
Traci Henderson
V"The technician was very thorough"
He explained the process of the work and provided information regarding a very old furnace.
Veronica M. D'Annibale
P"Cole was attentive"
Cole was attentive and really trying to fix the furnace problem.
PJM
E"Very professional, very knowledgeable"
Very professional, very knowledgeable and very helpful.
Ed Cain
Thorough Inspection and Tune-Up
Sam Criswell 39 did a thorough inspection and tuning up of our furnace. He was patient with our questions and gave a full report on his findings: professional, yet very personable.
Kelby Cotton
Top notch furnace inspection visit
Top notch visit for furnace inspections. Sam was the most thorough and knowledgeable HVAC professional that I have ever met. Great recommendations with no hard sell, which is refreshing.
Rob Smith
Sam was excellent
Sam was excellent. He did a thorough inspection, answered all my questions, and made sure our furnace was working properly.
dwight podgurski
Highly recommended
Jasmine Stiggers performed the annual furnace checkup. She was really great at explaining every detail and supplying options. She was very professional and clearly competent with her work. Highly recommended.
Robert Gotshall
Brandon Freed Came to Our Rescue
Brandon Freed came to our rescue after our furnace went out. He was polite, professional, and knowledgeable. He helped us get our home warm again in time for the next cold front. We're going to need a new system soon, and hopefully we can do business in the future. Thank you, Brandon and Allen Service!
Stephanie P
We Cannot Recommend Him Enough
We called Allen Service the moment we noticed our furnace wasn’t working properly, and they had an expert to our house within a few hours! Justin Adams was our technician and we cannot recommend him enough. He was professional, friendly, transparent, but most importantly, he was informative! He walked us through each step of the process and gave us a variety of options and suggestions for solutions they could provide. We’ll absolutely be contacting Allen Service for future services for our home!!
Cameron French
Excellent job on my furnace maintenance
Jeremy Bowman did an excellent job in my furnace maintenance! He was on time, cheerful, and professional!
Helen M
Did a Good Job on My Furnace Repair
Justin was very cordial and polite. Explained everything thoroughly. Did a good job on my furnace repair.
Karli K
An Exemplary Employee
Ian was absolutely fantastic! He worked so hard to get my furnace fixed and running. He’s an exemplary employee with a great work ethic and heart.
Alexandra Massey
You Guys Are the Best!
Our furnace went out over the weekend. Brandon Freed came right away and went through all the details with my husband and me. He was very kind, patient, caring, and thorough. We felt like he had our best interest in mind the whole time! Our situation was resolved sooner than what we thought it would be, and we feel like we have a solid plan moving forward! Thanks, Brandon! You guys are the BEST!!
Kathy Ellingson
Friendly and Professional at All Times
Zack performed maintenance and repair of my furnace as part of my contract with Allen. He had to come back another day for the repairs so he could get parts. It was very timely. He was friendly and professional at all times. I hope he is appreciated by the company. We proceeded to prevent complete breakdown needing expensive furnace replacement.
E. D. Ryckeley
He Went Above and Beyond
Cole was our service technician. He went above and beyond to explain what was happening with our older Coleman mobile home furnace and get the correct parts needed. Thanks to his expertise, it is now working well.
Marcia Johnson
Wealth of Knowledge
Wealth of knowledge and great honest recommendations. Thorough check on my furnace to see why it was not blowing hot air. Cole was very professional, kind, and a great problem solver. Greatly appreciated his efforts.
Connie Nieves
Very thorough inspection of the furnace
Service rep was very conscientious and did a very thorough inspection of the furnace.
Blake Catterall
Excellent Service Sam C.
10-20-2025
EXCELLENT SERVICE SAM C.
I am very pleased with the furnace service, education this tech provided me, he is professional, considerate, direct and understands what my concern was and adjusted my furnace, no problem!! Service that made me feel reassured.....thank you Sam!!
1-8-2025
KUDOS FOR JEFF CHAPMAN
What a great service tech! Professional, courteous, friendly, laughs at my silly jokes, educated me on my furnace concerns, and gave reasonable solutions, this company is a keeper, thanks Jeff.
c green
Very satisfied with the price and service
We have been with Allen Service for about 5 years now. We have purchased several major systems and have been very satisfied with the price and service. We also use the Maintenance Plan for annual inspections. Today Jeremy Bowman did our furnace inspection. He was extremely knowledgeable and helpful.
Sandee Hill
Justin is very knowledgeable and capable
Justin is very knowledgeable and capable in his servicing of my three furnaces under the Allen Service HVAC maintenance program 600 600. I thoroughly enjoyed having him at my place.
William Steigers
He Is an Awesome Employee
I couldn't have been more pleased with my serviceman, Zachary J. He was knowledgeable and very thorough. My furnace had a dead bird in the pipe near the motor. He did a yearly maintenance service, cleaned out the bird, and got my heat back on. All this at 6:30 in the evening. He even noticed that my hot water didn't work in the bathroom, so he fixed that too. He is an awesome employee for Allen Services in Aurora, Colorado!
Laura Adema
Justin did a great job.
Justin came to our home to inspect our furnace and found that some items needed replacing. With approval, he did so in a timely manner and cleaned up behind himself. Justin did a great job.
Vickie S
Justin Adams Did an Excellent Job
Justin Adams did an excellent job on my furnace service. He showed me before and after pictures. He did such a good job it looked like new. Thank you, Justin, for the awesome job you did.
Mike Newkirk
Zack was friendly and courteous
Zack was friendly and courteous. Took many pictures to show me how my furnace was doing and not doing. Very thorough.
Marcia Johnson
Very Efficient and Professional
Justin was very efficient and professional. He went over just how my furnace works and did his job in a timely manner.
Judith Szeszycki
Vincent Was Great
Vincent was great! On time, professional, and had the part I needed to fix my furnace in his truck! No hassle with additional appointments! Thank you!
Karen Young
Great experience with technician Justin Adams
Great experience with technician Justin Adams. Taught me a lot so I can understand exactly how my furnace is run. Serviced my hot water heater. Overall very satisfied.
Elisha Kukich
Charlie helped me out with the furnace
Charlie helped me out with the furnace and showed me pictures of what he did. I appreciated that.
Estee Fraitag
Courteous and Knowledgeable Service
Cole took time to explain why we were receiving the error code on our furnace, was courteous, knowledgeable, and I would recommend Allen Service and specifically Cole.
Sandra Brown
Cole Was Very Thorough
Cole was very thorough. He explained everything and completed a repair that will keep my furnace running for as long as possible. He also plans to return to check my heat pump in the summer. I would trust him to do a great job.
Traci Henderson
The technician was very thorough
The technician was very thorough. He explained the process of the work and provided information regarding a very old (probably installed in 1947 or 1948) furnace that remains in the crawlspace. Zach took photos and emailed them to me.
Veronica M. D'Annibale
Cole was attentive
Cole was attentive and really trying to fix the furnace problem. Very friendly.
PJM
Very professional, very knowledgeable
Sam Criswell came out to perform a furnace inspection. Very professional, very knowledgeable, and very helpful in what he found that should be taken care of, which I plan to do at a future date.
For over 60 years, Allen Service has delivered dependable HVAC, plumbing, and electrical solutions across Denver, Fort Collins, and beyond. As a family-owned company, we put your comfort first—offering quality workmanship, honest communication, and 24/7 service. Experience the difference that comes from people who truly care.
Why Choose Us:
Trusted local experts since 1962
Family-owned and operated for three generations
Comprehensive HVAC, plumbing, and electrical services
24/7 emergency availability
VIP membership plans with exclusive benefits
Customer-first guarantee on every job
Trusted HVAC Experts Since 1962
Decades of experience serving Colorado’s homes and businesses.
Courteous Service, Always On Time
Respectful, uniformed staff prioritize your schedule and satisfaction.
Fully Stocked Trucks for Quick Repairs
We arrive prepared to fix most issues in a single visit—no delays.
Expert Technicians, Lasting Solutions
Highly trained pros ensure quality work and long-term comfort.
Common Questions
How do I know if my furnace needs repair?
Common signs include strange noises, inconsistent heating, increased energy bills, or the system not starting. If you notice any of these, it's wise to have it checked by a professional.
How often should my furnace be serviced?
Regular maintenance is key to efficient operation. We recommend having your furnace professionally serviced once a year, preferably before the heating season.
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.
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.
