01 /
AC repair
Warm air, leaks, strange noises or a unit that won’t turn on.
Call for a free estimate
4.9 51 Google reviews
Heating & cooling, right here in Peoria
Peoria homes.Comfort, all year.Heating & cooling done right.
An AC that won’t keep up, a furnace that won’t start, or a system near the end of its life. Call Thermal Services, Inc. (TSI) for honest options.
Call for a free estimate.
Thermal Services, Inc. (TSI) · Peoria, ILExplore our services
Heating and cooling services
What we
can help with.
From quick fixes to bigger projects, start with a call and a clear plan.
02 /
Furnace & heating repair
No heat, short cycling or a furnace that won’t ignite.
Call for a free estimate03 /
System replacement
When it’s time for a new furnace or AC, understand your options.
Call for a free estimate04 /
Seasonal tune-ups
Maintenance before the heating and cooling seasons.
Call for a free estimate05 /
Thermostats
Thermostat installs and upgrades, explained clearly.
Call for a free estimate06 /
Airflow & comfort
Uneven rooms and weak airflow worth a closer look.
Call for a free estimateKnow when to call
Is it time
for a tune-up?
Catching problems early usually keeps them smaller. If any of these sound familiar, give us a call.
Call (309) 699-333301
Rooms that never feel right
Uneven temperatures can point to airflow or system issues.
02
Strange noises or smells
Rattles, squeals or burning smells deserve attention.
03
Rising energy bills
An older or struggling system often works harder than it should.
A simple place to start
From “what now?”
to a plan.
Call and tell us what’s going on
Share what you’re seeing and ask about a free estimate.
Understand your options
Talk through what the job needs before any work begins.
Choose your next step
Ask your questions and schedule when you’re ready.
In our customers’ words
Good work.
Word gets around.
★★★★★
I had a great experience with TSI! From start to finish, their team was friendly, professional, and genuinely respectful of my time. They showed up when they said they would, worked efficiently, and took the time to clearly explain what was going on with my HVAC system.
What I appreciated most was their honesty. They didn’t try to upsell me on anything I didn’t need and were very conscientious about my budget. It’s clear they care about doing the job right and making sure their customers understand their options.
Their knowledge and expertise really stood out, and I felt confident in the work being done. I recommend them to anyone in need!
★★★★★
Had issues with my geothermal unit not turning on and freezing up. Called TSI and had someone out immediately. Excellent customer service, very polite and respectful. Diagnosed bad compressor and defective sensor. Ordered parts and installed as soon as they were available. Got everything dialed in and back up and running quickly. Excellent workmanship, left no trash, and cleaned up after themselves. I will definitely continue to use this company in the future! Bills were mailed promptly and were very reasonable. Great company and employees!
★★★★★
I’ve used TSI for routine repairs/inspection of my furnace. Heath is extremely knowledgeable and pricing is very fair. Because of the service they’ve provided me, they were the first ones I called when my parents furnace went out in the middle of the winter. I’m extremely thankful for how quickly Heath responded in this emergency.
★★★★★
The technicians, Dillon and Darrell, were very prompt, courteous, and professional. Dillon replaced my furnace. Darrell replaced my ac-unit. Both units required some extra work as they were very antiquated. It was clear that both men took no shortcuts and did honest and straightforward work. And they were here at separate times. Each took the initiative to keep me in the loop on any changes that needed to be made and gave me options and perspective when I asked them to talk me through decisions. Their answers focused on what would be in my best interests. The office workers, Trisha and Cheyenne, were courteous and helpful. They communicated well and promptly when I had questions about equipment and pricing prior to install.--High quality employees make the value of a company, and are becoming more and more rare. This company has found 4 high-quality employees.
★★★★★
Very prompt response, on time and quality work would def recommend to any of my friends and family thank you guys for everything you do, had a bad heat exchanger when the heat exchanger came in mind you this takes some skill and hard work one guy came in the morning about 4 degree weather had it in before noon and working we were impressed because we know what it takes to do something like that it’s not easy most company’s will say you need a new unit.
Local starts here
Your Peoria home.
Our starting point.
Heating & cooling for Peoria and nearby. Just outside the city? Call with your address to confirm service availability.
Ask about your neighborhoodThermal Services, Inc. (TSI)2200 W Altorfer Dr Ste D1, Peoria, IL 61615
A little more clarity
Good questions.
Straight answers.
Every home is different. For questions about yours, call (309) 699-3333.
Can I get a free estimate?
Call (309) 699-3333 and describe the issue; ask about a free estimate.
Should I repair or replace my system?
It depends on the age and condition of your unit. Ask for your options before deciding.
Do you work on both furnaces and AC units?
Heating and cooling repair and replacement are both part of the work.
My AC is running but not cooling. What now?
Check the thermostat setting and filter, then call (309) 699-3333.
Do you serve homes outside Peoria?
Call with your address to confirm whether service is available in your area.
Let’s start with a conversation
Call for a free estimate.
Tell us what’s going on and take the first step toward getting it fixed.