Pro Business

Thermal Services, Inc. (TSI)

Peoria HVAC Companies
Ranked #8 in Peoria | Grade B
4.90 (50 reviews)

Thermal Services, Inc. (TSI)

Local HVAC contractor providing heating and cooling repair, system replacement, and maintenance with an emphasis on timely service and clear communication.

Why Homeowners Choose This Business

Customers cite quick scheduling, respectful technicians, and clear options before work begins. Work areas are left clean, and communication continues from diagnosis through completion.

Service Area

Peoria and surrounding communities in the Greater Peoria, IL area.


How This Business Compares

A quick local comparison based on ranking, review strength, and market visibility.
  • Performs at or above the local average for Google rating.
  • Shows strong customer satisfaction signals based on review quality and volume.

Services Covered

  Renovation Services
  Furnace Repair
  AC Repair
  Installations
  HVAC installation
  Repairs
  Heating Replacement
  Air conditioner replacement
  Geothermal HVAC Service
  Thermostat and controls
  HVAC Maintenance
  Indoor comfort
  System diagnostics
  Residential HVAC
  Light Commercial HVAC

Heating and cooling repair and replacement, seasonal HVAC maintenance, furnace service, air conditioner service, thermostat and controls, and geothermal system diagnostics and repair.


Reviews

Recent Reviews

4.90

(Based on 50 reviews)

Reviews consistently mention fast response when heat is out, including winter furnace issues. Customers highlight clear communication, no-pressure recommendations, and fair, transparent pricing. Workmanship and cleanup are praised, with technicians arriving when promised and explaining repairs and replacements, including geothermal fixes. Many note courteous, professional behavior throughout the visit.

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.

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 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!

Google Review
LaVonne Sammis Sammis on Thermal Services, Inc. (TSI)

Our furnace would not start, within a couple hours TSI was here, found the problem and fixed it. He was polite, friendly and VERY professional! Highly recommend calling TSI for your HVAC and AC needs!

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.

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Frequently Asked Questions

TSI performs heating and cooling repair, replacement, and routine maintenance. Recent reviews also mention furnace changeouts, AC replacements, and troubleshooting of geothermal systems.

Customers report very quick response on urgent heating issues, including same-day visits in cold weather. Actual scheduling depends on call volume and time of day.

Yes, reviewers describe TSI diagnosing sensors and compressors on geothermal units and returning to install parts once available. They also fine-tuned settings to get systems running correctly.

Technicians typically arrive on time, explain findings, and discuss options before work proceeds. Reviews note tidy work areas and updates if plans change or parts are needed.

Based on customer feedback, TSI has completed full furnace and AC replacements, including older systems that required extra steps. They keep homeowners informed about choices and timelines.
 Verified Listing

Opening Hours


  • Monday Open 24 hours
  • Tuesday Open 24 hours
  • Wednesday Open 24 hours
  • Thursday Open 24 hours
  • Friday Open 24 hours
  • Saturday Open 24 hours
  • Sunday Open 24 hours

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Business Details


Business Rating
4.90 (50 reviews) Pro Business
Address
2200 W Altorfer Dr Suite D1, Peoria, IL 61615
Phone
Business Type
general_contractor

Location Map

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