Thermostat Repair Service in GTA

Looking for reliable thermostat repair services in GTA? Our certified technicians provide fast, accurate repairs for all thermostat types to ensure optimal comfort and reduce HVAC inefficiency, high energy bills, and temperature fluctuations. We also provide emergency, same-day solutions for your convenience!

Smart Temperature Control

Heating & Cooling Problems? We Fix Thermostats Fast in GTA!

A malfunctioning thermostat can cause HVAC inefficiency, short cycling, or temperature fluctuations. Whether it’s a wiring issue, sensor failure, or calibration problem, our licensed technicians provide fast diagnostics and expert repairs quickly. We service smart, programmable, and manual thermostats for seamless operation and precise temperature control at any time of the year.

HVAC-GROUP

5.0

Based on 216 reviews

review us on

michael wickeler

16:50 06 Aug 25

HVAC GROUP punctual and very efficient at their job. Figured out the problem quickly and fixed the Air conditioner.

Response from the owner 17:07 06 Aug 25

Thank you, Michael, for the great review! We’re glad we could quickly diagnose and repair the rooftop unit at your Etobicoke property. From clearing the clogged drain tube and drain plate to cleaning the dirty coil fins and fixing the A/C relay connection — our goal is always fast, reliable service. We appreciate your trust in HVAC GROUP for your rooftop repair needs in Etobicoke. Don’t hesitate to reach out anytime you need us!

Erica Larry

22:45 01 Aug 25

Amazing service from Yuri! We will be using you again in the near future. Thank you again.

Response from the owner 23:14 01 Aug 25

Thank you so much for the 5-star review, Erica! We’re glad we could help with your A/C not cooling at your home on Ferndale Ave in Toronto. Our team at HVAC-GROUP quickly cleared the blocked furnace room drain and recharged your A/C unit with the proper level of R410A refrigerant for efficient cooling. Your comfort is our priority. If you ever need HVAC service in Toronto again, we’re just a call away!

Max Peters

15:47 31 Jul 25

Yuri and team quickly diagnosed my A/C issue and had the system back and running, with a very quick response time. Would recommend to anyone.

Response from the owner 16:19 31 Jul 25

Thank you Max so much for your kind words and 5-star review! We’re glad we could help get your AC back up and running quickly. Replacing the failed start/run capacitor was a simple fix, and we’re always happy to provide fast, reliable air conditioning repair service in the Etobicoke area. If you or anyone you know ever needs HVAC service in Etobicoke or the surrounding areas, HVAC Group is here to help!

Dave Neeb

16:03 30 Jul 25

Excellent and thorough, great pricing. Thanks again.

Response from the owner 17:28 30 Jul 25

Thank you, David! We’re glad we could help get your AC up and running again. We appreciate your kind words about our service and pricing—it means a lot. If you ever need anything in the future, don’t hesitate to reach out. Stay cool!

John Hamilton

19:58 25 Jul 25

The HVAC Group did a fantastic job restoring our broken AC . Quality professional workmanship at a fair price .We will definitely call them back next time .

Response from the owner 20:48 25 Jul 25

Thank you, John, for the 5-star review! We’re glad we could help with your AC repair and get your system back up and running. It’s great to hear you appreciated the quality workmanship and fair pricing. We look forward to helping you again whenever you need us! – HVAC Group

Katie Ogiba

01:17 25 Jun 25

HVAC Group came recommended by a friend when our AC stopped working on a 38 degree day. We had called other services and either couldn't get through or everyone was booked. When I spoke to Yiri he said it was so busy they were booked until next week (which I expected as every other place said the same thing). But he stayed on the phone to ask a few questions about the unit. He was kind, and you can just tell when someone actually cares - he didn't have to talk me through the possible issues etc. He ended up sending someone out that evening who fixed it within 15 minutes. We are so appreciated of the service- both the actual work done and the customer care. Highly recommend. Thank you to both Yiris!

Response from the owner 01:59 25 Jun 25

Thank you, Katie, for taking the time to leave us a 5-star review!We’re glad we could help with your AC not cooling issue — it really means a lot to us.At HVAC Group, we’re always happy to assist both returning and new customers with air conditioning repairs, new AC installations, or furnace service during the heating season. Don’t hesitate to reach out if you ever need help again.Thanks for trusting us!— HVAC Group

Andre

02:52 19 Jun 25

Great service - fast, knowledgeable, thoughtful, very professional! Helped me well and fast!

Response from the owner 11:41 19 Jun 25

Thank you, Andre, for taking the time to leave a review! We truly appreciate your support. Don’t hesitate to reach out if you ever need air conditioning or furnace repair in the future — we’re always here to help!

thariyor@gmail.com ariyo

22:47 10 Jun 25

HVAC Group responded quickly and had my noisy air conditioner fixed within a day. Their professionalism and customer-first approach really stood out. They go above and beyond—highly recommended!

Response from the owner 03:37 11 Jun 25

Thank you for the great review! We’re glad we could help with your noisy air conditioner so quickly. When you contacted us about your Lennox AC making unusual noise, our technician arrived the same day and found the outdoor condenser was clogged and the fan motor was extremely noisy. Since the AC parts warranty was still valid, we replaced the faulty motor and thoroughly cleaned the unit to restore quiet and efficient operation.We appreciate you choosing HVAC Group for your local AC repair in Mississauga. Your comfort is our priority!

Daniel Liu

19:04 04 Jun 25

HVAC group has been absolutely fantastic to help us replace our air conditioner. From diagnosing to replacement took only 2 days (since the replacement unit was in stock). This is especially appreciated as the weather was getting hot fast and I have a newborn baby that cries in the heat. Yura is extremely knowledgeable and Yuriy installed the unit professionally with no interruption and minimal noise to our house’s activities. Thank you for your help! HVAC group comes highly recommended and I’ll be reaching out to them for routine maintenance!

Response from the owner 22:00 04 Jun 25

Thank you so much for the wonderful 5-star review! We’re thrilled to hear you were happy with your Lennox AC installation experience. We understand how important a cool home is—especially with a newborn—and we’re glad we could respond quickly and get everything running smoothly in just two days. Yura and Yuriy truly appreciate your kind words. We’re always here when you need us, and we look forward to helping with your future maintenance needs. Thanks again for trusting HVAC Group!

Pranav Kumar

22:15 01 Jun 25

Got my thermostat changed and replaced the AC too. The price point is completely trust worthy and the service highly professional!

Response from the owner 22:57 01 Jun 25

Hi Pranav,Thank you so much for the great review! We’re glad you’re happy with the Lennox AC installation and thermostat replacement. It means a lot to hear that you found our pricing trustworthy and our service professional. We truly appreciate your support and look forward to helping you again in the future!— HVAC Group

Olena M

21:03 01 Apr 24

Amazing service, quick and clean replacement of the old water tank, we definitely recommend this team to anyone who would need installation or replacement

Daniel Campana

16:25 23 Mar 24

I had an issue with my Rheem furnace not heating, so I reached out to HVAC-group for assistance. The technician was quick to identify the problem as a faulty flame sensor. The service was prompt, efficient, and ultimately effective. I'm very pleased with their work and would highly recommend their services to anyone facing HVAC issues.

lakhbir phull

16:34 10 Mar 24

Excellent service, immediate response, reasonable price, very happy with their services.

Tina Obersnel

12:18 29 Jan 24

I highly recommend calling HVAC-GROUP for your maintenance and service needs. Yuriy was great. Quick to respond and resolve the issue. I am very happy with the outcome.

VIKKY

19:29 17 Jan 24

I was having problem with a tankless water heater here in edmonton !
I just googled about it and i found his contact number , and i got my problem solved , because i called him and he actually explained everything very clearly and amazingly! Thank you so much
My tankless water heater was showing E110 , i was unable to get that, but he told me that you need clean the air intake filter then i open the panel and did exactly what he told me to do. By that why i got my problem solved!
Thanks buddy

Stan Ivanov

15:37 20 Dec 23

I came from vacation to a broken furnace and a cold house. I called HVAC group late at night and they were able to send someone the next morning.

Technician was very professional, found that I had an igniter problem, had a spare part with him and solved the problem within an hour.

Reasonable pricing and very professional. Highly recommended!!!

Ingrid Turner

07:26 13 Dec 23

Yuri is a true professional and is a very knowledgeable expert about furnaces.
I called him for advice when another well known Hvac company wrongly diagnosed my Trane furnace blower noise and told me I needed to undergo a $1500 repair. Yuri quickly assessed the problem and voila no more blower motor problems. All for $140!!
Thank you Yuri! I highly recommend your service, honesty and expertise.

Anisha Mathews

18:19 29 Sep 23

Yuriy was very informative and helpful in selecting and installing our new furnace. His prices are very reasonable and the work was completed on time. He was also helpful in setting up our thermostat. I highly recommend his services!

Marah Di Nola

21:36 14 Aug 23

Exceptional customer service, immediate response by phone & text, professional workmanship!! Clean respectful, very impressed with the workmanship. Thank you once again. Highly recommend for HVAC, water heater replacement. Answered all my queries without hesitation or reservation. Will definitely 💯 use again!!

Perfect Climate, Always

Expert Thermostat Repairs Tailored to Your Needs

Thermostat Diagnostics and Troubleshooting

We identify wiring faults, sensor failures, and power issues using advanced tools like multimeters, manometers, and digital temperature sensors to restore proper function.

Thermostat Wiring Repair

Faulty low-voltage wiring, loose connections, or damaged relays can cause HVAC malfunctions. We repair and replace R, C, W, Y, and G wires to ensure seamless communication with your system.

Thermostat Replacement

If your thermostat is beyond repair, we install manual, programmable, and smart thermostats with proper HVAC compatibility, voltage matching, and precise sensor calibration.

Smart Thermostat Repair and Connectivity Issues

We fix Wi-Fi connectivity, app syncing, and firmware issues for smart thermostats like Nest, Ecobee, Honeywell, and Lux to ensure proper HVAC system integration and remote access.

Battery and Power Source Repairs

A thermostat that won’t power on may have low battery voltage, faulty 24V transformer, or C-wire issues. We replace power sources and correct low-voltage circuit malfunctions.

Thermostat Calibration

Inaccurate temperature readings can lead to HVAC inefficiency. We recalibrate temperature sensors, heat anticipators, and differential settings for precise climate control.

Outdated Thermostat Upgrades

Older thermostats lack energy-efficient features. We upgrade outdated models to programmable or smart thermostats, ensuring optimal HVAC performance and energy savings.

Having a HVAC problem? We’ll FIX it today!

We’re available 24/7 to restore your comfort. Call now for same-day service!

24/7 Service

(416) 807-2752

Energy-Saving Technology

Signs Your Thermostat Needs Repair & How We Can Help

Thermostat Not Turning On

A blank or unresponsive thermostat may indicate power failures, faulty wiring, dead batteries, or a damaged control board. We test voltage, inspect low-voltage circuits, and repair defective components.

Inaccurate Temperature Readings

If your thermostat doesn’t match the room’s temperature, it may have sensor calibration issues, dust buildup, or incorrect placement. We recalibrate temperature sensors for precise climate control.

HVAC System Not Responding to Thermostat

A disconnected or misconfigured thermostat can cause furnace, Air Conditioner, or heat pump malfunctions. Our technicians inspect relay switches, control boards, and communication signals to restore proper operation.

Short Cycling (Frequent On/Off Cycling)

If your HVAC system turns on and off too often, it could be due to incorrect heat anticipator settings, faulty wiring, or a failing temperature sensor. We diagnose and correct the issue for steady performance.

Smart Thermostat Connectivity Issues

Wi-Fi-enabled thermostats may lose connection due to firmware bugs, router interference, or incorrect network settings. Our experts troubleshoot and update Nest, Ecobee, and Honeywell thermostats for seamless control.

Qulaity Brands We Work With

From Carrier to Trane – The Best AC Brands We Work With

RunTru_WebLogo_RGB_BYTRANE_OnWhit_080120142737_Hires

Beat the Heat with HVAC-Group

Smart, Programmable & Traditional Thermostats – We Repair Them All

Non-Programmable Thermostats

These basic models control manual temperature adjustments but can fail due to wiring issues, aging sensors, or faulty relay switches. We inspect and repair for consistent heating and cooling performance.

Programmable Thermostats

Designed to schedule temperature changes, programmable thermostats may experience battery failures, misconfigured settings, or power supply issues. Our technicians recalibrate and restore optimal operation.

Digital Thermostats

Digital models rely on precision sensors and LCD displays. We fix faulty backlit screens, inaccurate temperature readings, and unresponsive controls to ensure precise HVAC system communication.

Smart Thermostats

Wi-Fi-enabled thermostats like Nest, Ecobee, and Honeywell may have connectivity issues, software glitches, or failed integration with smart home systems. We troubleshoot and update for seamless automation.

Wireless Thermostats

These models communicate via RF signals or Bluetooth and can suffer from signal interference, battery depletion, or HVAC miscommunication. Our expert technicians restore stable connections and accurate temperature control.

Zoned HVAC Thermostats

Zoned systems regulate individual room temperatures but can malfunction due to faulty dampers, control board failures, or sensor misalignment. We ensure balanced airflow and proper zoning operation.

Heat Pump Thermostats

Specialized for dual-mode heating and cooling, heat pump thermostats may fail due to incorrect settings, wiring defects, or reversing valve issues. We diagnose and fix for optimal year-round efficiency.

Stay in Control

From Homes to Offices – We Serve All Property Types

Residential

We repair and upgrade thermostats for single-family homes, condos, and apartments to ensure seamless operation with furnaces, central AC units, heat pumps, and zoned HVAC systems. From faulty sensors to wiring issues, we restore comfort and efficiency.

Commercial

Businesses rely on precise climate control for productivity and customer comfort. We service office buildings, retail stores, warehouses, and restaurants, fixing BMS-integrated thermostats, multi-zone HVAC controls, and programmable commercial units for optimal performance.

Smart Home Comfort

Emergency Thermostat Services – We’re Here When You Need Us

A malfunctioning thermostat can disrupt heating and cooling, causing HVAC failures, short cycling, or unresponsive controls. Our 24/7 emergency service diagnoses and repairs wiring faults, sensor malfunctions, and power supply issues to ensure precise temperature regulation and system efficiency.

Professional Thermostat Services

Achieve optimal comfort and efficiency with our expert thermostat services. From thermostat installation to calibration and maintenance, our skilled technicians provide reliable solutions to keep your home perfectly heated or cooled. Contact us today to schedule your service

Thermostats Made Simple

Lower Energy Bills with Our Efficient Thermostat Services

A properly functioning thermostat optimizes HVAC efficiency and reduces energy waste and utility costs. We repair and calibrate temperature sensors, heat anticipators, and programmable settings for precise climate control. Upgrading to smart or programmable thermostats enhances performance, automates schedules, and improves overall system efficiency.

Why to Work with Us

Why Choose HVAC Group for Thermostat Repairs in GTA?

Comfort Made Easy

Real Results from HVAC-Group Inc

Quality First HVAC Services Just A Call Away!

Business Hours
Monday to Friday: 8 a.m.–9 p.m.
Saturday and Sunday: 9 a.m.–2 p.m.

Location We Serve

HVAC-Group Inc. has been servicing Toronto and GTA surrounding areas for more than 20 year.

Summer's Calling! Get Our Exclusive AC Installation Deals

Frequently Asked Questions

Can a thermostat be repaired?

Yes, most thermostat issues can be repaired, including wiring faults, sensor calibration errors, power supply issues, and connectivity problems. Our technicians diagnose and fix problems quickly.

How much does it cost to repair a thermostat?

The cost depends on the issue and thermostat type. Basic repairs start around $80-$150, while complex issues like wiring replacement or smart thermostat troubleshooting may cost $150-$300.

Who to call when your thermostat is not working?

A licensed HVAC technician should inspect and repair your thermostat. We diagnose power failures, communication errors, and HVAC system misalignment to restore proper temperature control.

How do I tell if my thermostat is bad?

Signs of a failing thermostat include inaccurate temperature readings, HVAC system short cycling, unresponsive controls, and connectivity issues. If troubleshooting doesn’t fix it, professional repair is needed.

What causes a thermostat to stop working?

Common causes include dead batteries, wiring issues, sensor failures, power supply disruptions, and software glitches in smart thermostats. Our team can pinpoint the problem and restore functionality.

Do smart thermostats need special repairs?

Yes, smart thermostats require expertise in Wi-Fi connectivity, app integration, firmware updates, and HVAC system compatibility. We troubleshoot and restore performance for brands like Nest and Ecobee.

Is it better to repair or replace a thermostat?

If your thermostat is over 10 years old, frequently malfunctions, or lacks modern features, upgrading to a programmable or smart thermostat can improve energy efficiency and system performance.
.

How long does a thermostat repair take?

Most repairs take 30 minutes to 2 hours, depending on the complexity of the issue. Our technicians ensure fast and efficient service with minimal disruption.

Will a faulty thermostat increase energy bills?

Yes, a malfunctioning thermostat can cause HVAC overuse, temperature fluctuations, and system inefficiency, leading to higher energy costs. Repairing it ensures optimal performance and savings.

If my thermostat can’t be repaired, can you install a new one?

If your existing unit is beyond repair, we provide professional thermostat installation as part of our service. We install both standard and smart thermostats to ensure your heating and cooling system runs efficiently and gives you full control over your indoor comfort.