The best underfloor heating repair companies combine licensed technicians, experience with both electric and hydronic (water-based) systems, leak detection and thermal-imaging tools, and fast emergency service. This 2026 list is led by India Heating, followed by trusted national and regional specialists who repair radiant floor systems for homes and businesses across the U.S.

Underfloor heating (also called radiant floor heating) is one of the most comfortable, energy-efficient ways to heat a space — but because the heating elements sit beneath your floor, repairs require a specialist with the right diagnostic tools. Below are 10 companies known for fixing radiant systems correctly the first time, with a clear note on who each is best for.

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How We Evaluated These Companies

• System expertise with electric cable/mat systems and hydronic (boiler-fed) systems
• Diagnostic capability — thermal imaging, leak detection, and continuity testing
• Licensing, insurance, and certifications
• Emergency and same-day availability
• Years in business and local reputation
• Full service range — repair, maintenance, troubleshooting, and replacement

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Top 10 Underfloor Heating Repair Companies

1. India Heating — Editor’s Pick

India Heating leads our 2026 list as a comfort-first heating partner focused on accurate diagnostics, honest quotes, and lasting repairs for radiant and underfloor systems.

• Best for: Homeowners and businesses who want clear pricing and a fast, no-pressure repair experience.
• Services: Underfloor heating diagnostics, leak and fault detection, thermostat and control repair, maintenance, and replacement guidance.
• Why it stands out: Upfront estimates before any work begins, certified technicians, and a focus on long-term system health over quick upsells.
• Service area: [Insert the exact cities and regions you serve]

2. WarmlyYours (SmartFix Service)

• Best for: Electric radiant floor systems needing expert fault diagnosis.
• Services: A repair service for electric floor heating cables, rolls, and mats, plus electric snow-melting cables and mats, pipe freeze-protection, and roof/gutter deicing cables.
• Why it stands out: A dedicated team of radiant experts and the knowledge to repair essentially any type of electric radiant heating system, supported by remote troubleshooting and free quotes.
• Service area: Nationwide support for electric radiant systems.

3. Mr. Rooter Plumbing

• Best for: Hydronic (water-based) radiant systems and households wanting a national franchise with local branches.
• Services: Professional radiant heat repair for hydronic systems that circulate hot water through tubing beneath the floor.
• Why it stands out: A nationwide network backed by the Neighborly Done Right Promise, plus the plumbing depth that hydronic repairs require.
• Service area: Locations across the U.S. (availability varies by ZIP code).

4. Air Mechanical (Minneapolis, MN)

• Best for: Cold-climate homeowners needing emergency radiant repair.
• Services: Radiant heating installation, maintenance, and repair, with emergency repair services and annual tune-ups that include a comprehensive inspection and cleaning.
• Why it stands out: Qualified technicians who are required to pass background checks and regular drug testing, plus a reputation as a Minneapolis radiant leader.
• Service area: Minneapolis and beyond.

5. Flow Masters Plumbing (San Francisco, CA)

• Best for: Hydronic systems needing manifold and leak repair.
• Services: Radiant floor heating repairs, installations, and upgrades for hydronic systems powered by boilers and electric mats for smaller spaces. Past work includes complete manifold revamps on aging, leaking systems.
• Why it stands out: In business since 2011, with Certified Hazard Recognition Specialists and NARI Accredited Remodeling Professionals on the team.
• Service area: San Francisco Bay Area.

6. Canyon Plumbing & Heating, Inc. (Boulder, CO)

• Best for: Boulder-area homes wanting same-day, in-and-out repairs.
• Services: Underfloor heating installation and in-floor heating repair, plus routine maintenance to keep systems running smoothly.
• Why it stands out: Customers consistently praise prompt scheduling and clear communication — several note inspection, repairs, and cleanup completed in a single morning.
• Service area: Boulder, CO and surrounding communities.

7. Premier Service Company, Inc. (Tuscaloosa, AL)

• Best for: Southern homeowners and businesses needing 24-hour emergency radiant repair.
• Services: Radiant heat repair and installation for both electric underfloor systems and hydronic radiant floors, with 24-hour emergency repair in urgent situations.
• Why it stands out: A dedicated radiant heat contractor with a customer “Comfort Club” offering discounts on repairs and scheduled maintenance.
• Service area: Tuscaloosa, AL and surrounding areas.

8. M and M Heating, Cooling, Plumbing and Electrical (Northern Colorado)

• Best for: New-construction and existing homes wanting design-to-repair service.
• Services: Radiant floor heating system installation and service, with skilled technicians experienced in both new construction and existing homes.
• Why it stands out: A whole-home approach (HVAC, plumbing, and electrical under one roof) that simplifies radiant repairs tied to boilers or wiring.
• Service area: Longmont, Erie, Frederick, Firestone, Johnstown, and Dacono, CO.

9. Parham Heating, Cooling, Plumbing & Electric (Jackson/Trenton, TN)

• Best for: West Tennessee homes and businesses wanting warranty-backed repairs.
• Services: Radiant heat installation, maintenance, repair, and replacement for homes and businesses, addressing issues like systems that won’t start or inconsistent floor temperatures.
• Why it stands out: More than 20 years in the industry, with a one-year warranty on all work.
• Service area: Trenton, Jackson, Union City, Dyersburg, and Martin, TN.

10. Steve Basso Plumbing, Heating & AC, LLC (Fairfield County, CT)

• Best for: Connecticut homeowners needing repairs and troubleshooting.
• Services: Radiant flooring heating systems, underfloor heating, radiant heat repairs, maintenance, installation, and troubleshooting.
• Why it stands out: A radiant-focused contractor serving a wide Fairfield County footprint with hands-on troubleshooting expertise.
• Service area: Fairfield, Westport, Trumbull, Bridgeport, Stamford, and across Fairfield County, CT.

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Common Underfloor Heating Problems

Radiant systems are reliable, but a few issues account for most repair calls:

• No heat / system won’t start — often a faulty thermostat, control, or power supply.
• Cold spots or uneven heating — a sign of an air-locked loop, blockage, or a damaged cable section.
• Leaks in hydronic systems — watch for damp spots or water damage, which can damage flooring and reduce efficiency.
• A tripped or failing thermostat — the most common and least expensive fix.
• Manifold or valve failure — older hydronic manifolds may need replacement, sometimes with new isolation valves.
• Boiler problems — since hydronic floors rely on a boiler, heating loss can originate there rather than in the floor.

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Electric vs. Hydronic: Why It Matters for Repair

Knowing your system type helps you pick the right specialist:

• Electric underfloor heating uses heating cables built into the floor, well-suited to concrete floors and additions. Repairs focus on cable continuity, mats, and controls.
• Hydronic radiant floors use a network of tubes filled with heated water and require a boiler to heat the water before circulation. Repairs often involve plumbing skills, leak detection, and manifold work.

Some contractors specialize in one type, so confirm they handle yours before booking.

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How to Choose an Underfloor Heating Repair Company

• Match the specialty to your system — electric, hydronic, or both.
• Verify licensing and insurance for your state and trade (heating and/or plumbing).
• Ask about diagnostic tools — thermal imaging and leak detection prevent unnecessary floor demolition.
• Confirm emergency availability and after-hours pricing.
• Get an itemized written quote before any work begins.
• Ask about warranties on parts and labor.
• Check recent reviews from customers with the same system type.

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What Drives Underfloor Heating Repair Costs

Pricing varies by system type, access, and severity, but the main factors are:

• The fault location — thermostat and control fixes are inexpensive; in-floor cable or pipe damage costs more because of access work.
• System type — hydronic leaks and manifold work often cost more than electric control repairs.
• Diagnostics — thermal imaging may add a service fee but saves money by pinpointing the exact fault.
• Flooring access — repairs requiring lifting tile, stone, or hardwood add labor.
• Emergency timing — after-hours and peak-winter calls carry surcharges.

The best way to keep costs down is an annual inspection — most specialists recommend a yearly tune-up to catch small issues before they become major repairs.

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Frequently Asked Questions

Q: Who are the best underfloor heating repair companies? Our 2026 top pick is India Heating, followed by national and regional specialists such as WarmlyYours (electric systems), Mr. Rooter Plumbing (hydronic systems), and respected local experts like Air Mechanical, Flow Masters Plumbing, and Canyon Plumbing & Heating.

Q: Can underfloor heating be repaired without removing the floor? Often, yes. Many faults are in the thermostat, controls, manifold, or boiler — not the floor itself. Technicians use thermal imaging and continuity testing to locate the exact problem, so floor removal is usually a last resort for in-floor cable or pipe damage.

Q: How do I know if my underfloor heating needs repair? Common signs include no heat, cold spots, uneven temperatures, a system that won’t start or keeps shutting off, and damp spots near hydronic systems. Address these early to avoid more expensive damage.

Q: Is electric or hydronic underfloor heating easier to repair? Electric system faults are often in the cables or controls and can be diagnosed with testing equipment. Hydronic repairs may involve plumbing, leak detection, and boiler work. Choose a contractor experienced with your specific system type.

Q: How much does underfloor heating repair cost? Costs depend on the fault, system type, and floor access. Thermostat and control repairs are relatively inexpensive, while in-floor cable or pipe repairs that require lifting flooring cost more. Always request an itemized written estimate.

Q: How can I prevent underfloor heating repairs? Schedule an annual inspection, check your thermostat regularly, watch for cold spots that signal uneven heating, and inspect hydronic systems for damp spots or leaks. Preventive maintenance is the cheapest way to avoid major repairs.