Working Hours
24/7 Emergency Service
At U.S. Allied Plumbing, Heating, & Cooling, we proudly serve homeowners in and around Naperville, IL with reliable furnace repair, maintenance, and installation services. Whether you’re dealing with an aging system, planning an upgrade, or simply want to stay ahead of seasonal issues, our experienced team is here to keep your home warm and energy-efficient all winter long. With over 40 years of experience and a reputation for excellence, we deliver prompt, high-quality heating solutions that prioritize your comfort and peace of mind.
When your furnace breaks down, you need fast, expert service you can count on. Our licensed technicians are trained to handle a wide range of heating system problems—from pilot light issues and thermostat malfunctions to airflow blockages and complete system failures. We use the latest diagnostic tools to pinpoint the problem quickly and accurately, so we can get your system back up and running without delay.
We understand how critical reliable heat is, especially during frigid Illinois winters. That’s why we offer 24/7 emergency furnace repair services for urgent situations. Our goal is always to restore your comfort and ensure your system runs safely and efficiently.
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Routine furnace maintenance is the key to avoiding unexpected breakdowns and costly repairs. Our maintenance services are designed to keep your system operating at peak performance throughout the heating season. We perform a detailed inspection of all critical components, clean internal parts, check gas connections, and ensure the system is running safely and efficiently.
By scheduling regular tune-ups with our expert team, you can extend the life of your furnace, improve indoor air quality, and reduce energy bills. Our annual service plans make it easy to stay on top of maintenance without the hassle.
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If your current furnace is outdated, inefficient, or beyond repair, we offer professional furnace installation services to match your needs and budget. We work with trusted brands like Carrier, York, American Standard, and Armstrong Air, ensuring you receive a high-performance system that will keep your home comfortable for years to come.
Our installation process includes a free in-home estimate, removal of your old system, and complete setup of your new furnace. We also take the time to walk you through your new system and answer any questions, so you feel confident in your investment.
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At U.S. Allied, we bring over four decades of experience to every job. Our team is fully licensed, insured, and committed to providing honest, high-quality workmanship. We pride ourselves on treating every customer like family—with respectful service, fair pricing, and reliable results. Whether you need emergency furnace repair or a full system upgrade, you can trust us to get the job done right the first time.
EXCELLENT Based on 233 reviews art hazen2025-01-13Trustindex verifies that the original source of the review is Google. I sent out a request for a quote for a failing ejector pump. I got a call back almost immediately from U.S. Allied. They set up an appt for Monday with Howard. Service was prompt and diagnosed the problem as a failing check valve. Howard replaced only the check valve and the system was working great. Howard was great to work with and got the job completed very timely and was super clean. Appreciate all his hard work!! Darrell St John2025-01-09Trustindex verifies that the original source of the review is Google. US Allied always takes good care of us. All the techs are great! Especially Howard and Hans. SkillsFlo2024-11-02Trustindex verifies that the original source of the review is Google. US Allied responded very quickly. Howard came to the house and was super professional and efficient. Fixed the problem and left everything better than new. Will call US Allied and Howard again. Rich Szaflik2024-10-10Trustindex verifies that the original source of the review is Google. Had a water heater with power vent and a thermo expansion tank installed. The office staff was very professional and courteous. Plumber Matt performed the install and also was very professional with great quality of work. I quoted about 10 plumbers and they were the best overall quote with an added bonus of exceptional service. Sherry Stoffel2024-07-11Trustindex verifies that the original source of the review is Google. Howard was prompt, courteous, knowledgeable, and very helpful in answering my questions. Robert Powell2024-06-28Trustindex verifies that the original source of the review is Google. Alex was truly exceptional in completing the issues with my downstairs toilet. Steven Zink2024-06-18Trustindex verifies that the original source of the review is Google. Alex did an excellent job! Positioned the new water heater so that the controls would be accessible, added vertical run in the vent line for improved draft, added an expansion tank, explained very clearly what routine maintenance is recommended. Looking forward to the next project with US Allied! Liz Hornbeck2024-06-07Trustindex verifies that the original source of the review is Google. I AM BEYOND THRILLED W JP’s and Anthony’s professionalism!! I’m a girl and my dad was going to pay. That’s important bc JP could’ve said $1000s of work needed to be done but it was $100!!! They charged me labor only!!! Local IS best! They came out the SAME HOUR!! OMG!! I’m so relieved it was just a WASHER!! They’re awesome and I have a plumber co for life!!!! Thanks Gabrielle Holt2024-05-24Trustindex verifies that the original source of the review is Google. Alex G. was such a great technician! He arrived on time as the dispatcher stated. I told him my issue, he provided me few recommendations to prevent service calls in near future and he got the job done at reasonable price!! He was very professional, he didn't come off as a " I'm trying to sell you something guy". Just a very genuine guy who worked with a purpose, to make sure the job was done accurately but with quality behind it! Nice to see this company is close to home too! I will definitely use them again in future!
We’re proud to offer seasonal specials to help you save on service throughout the year.