Fast & Reliable Tankless Water Heater Repair Services
Running out of hot water in the middle of a shower is frustrating, especially during a cold Mississauga winter. If your on-demand system suddenly stops working, it’s time to schedule tankless water heater repair in Mississauga before a minor issue turns into a major inconvenience. Unlike traditional hot water tanks that store a limited amount of heated water, tankless water heaters provide hot water on demand while using less energy because they only heat water when it’s needed. When your system isn’t performing as it should, Tamas Mechanical provides professional tankless water heater repair in Mississauga to restore reliable hot water and keep your home comfortable year-round.
Over $200
Industry Certifications & Affiliations
Why Choose Us Tankless Water Heater Repair
Our TSSA-certified technicians deliver expert tankless water heater repairs to restore reliable performance with lasting solutions and transparent pricing.
Certified Technicians
Licensed HVAC experts delivering safe, reliable, and professional service every time.
15+ Years Experience
Decades of HVAC knowledge for reliable results.
100% Customer Satisfaction
We ensure every job meets your expectations.
Budget-Friendly Services
Quality HVAC solutions with honest, upfront pricing.
Signs You Need Tankless Water Heater
Repair in Mississauga
Inconsistent Hot Water
If your water temperature keeps changing or suddenly turns cold, your tankless unit may have a faulty heating component, flow sensor or ignition problem. If left unresolved, the fluctuations may eventually lead to a complete loss of hot water.
Low Hot Water Flow
Reduced water pressure from hot water taps may indicate mineral buildup inside the heat exchanger or a partially blocked water filter. A failing flow sensor or partially closed isolation valve can also limit the amount of hot water reaching your fixtures.
Error Codes on the Display
Most modern tankless water heaters display diagnostic error codes when a fault is detected. These codes may point to ignition failures, venting issues, overheating or sensor malfunctions that require professional attention.
Strange Noises During Operation
Clicking, rumbling or whistling sounds often indicate mineral deposits inside the heat exchanger. Left untreated, scale buildup can reduce efficiency and shorten the life of the unit.
Water Leaks Around the Unit
Leaks can develop from worn seals, loose plumbing connections, damaged valves or internal component failure. Prompt repairs help prevent water damage and further system deterioration.
Rising Energy Bills
A sudden increase in your energy bills may indicate that your tankless water heater is no longer operating efficiently. Mineral buildup, a dirty heat exchange or damaged internal parts can force the unit to work harder and run longer to heat the same amount of water.
Mississauga Hard Water &
Your Tankless Unit
Hard water is a common issue in Mississauga, with the local water supply averaging 7 to 9 grains of hardness per gallon due to naturally occurring calcium and magnesium. Over time, these minerals form scales inside your tankless water heater’s heat exchanger. This buildup restricts water flow and reduces heating efficiency.
Without regular descaling, hard water buildup forces the unit to work harder, increases energy consumption, and can eventually lead to overheating or component failure. Tamas Mechanical recommends routine maintenance and professional flushing to remove mineral deposits, improve efficiency, and help maximize the lifespan of your tankless water heater.
What Tamas Mechanical Actually Repairs
Tamas Mechanical repairs a wide range of tankless water heater problems across all major brands. Our technicians carry the tools and replacement parts needed to resolve many issues during the first visit.
We commonly repair:
Ignition and burner problems
Heat exchanger issues
Flow sensor failures
Thermistor and temperature sensor faults
Gas valve malfunctions
Pressure relief valve problems
Water leaks and damaged fittings
Venting and exhaust issues
Control board failures
Error code diagnostics and repairs
Scale buildup and internal cleaning
Annual descaling and preventative maintenance
Easy Tankless Water Heater Repair Process
Complete System Diagnosis
We inspect your tankless water heater's heat exchanger, burner, flow sensor, venting system, and water connections. Our technicians also review any error codes and test the unit's performance to accurately identify the source of the problem.
Repair Options & Upfront Pricing
Once we've identified the faulty component, we explain the repair options, discuss any recommended descaling or part replacements, and provide an upfront estimate before proceeding.
Expert Tankless Water Heater Repairs
Our licensed technicians repair or replace faulty components such as flow sensors, ignition systems, heat exchangers and gas valves using high-quality parts and manufacturer-approved repair methods. Every repair is completed to restore safe, efficient, and reliable hot water performance.
Performance Testing
Once repairs are complete, we thoroughly test the unit to verify proper operation, stable water temperature and safe performance before leaving your home.
What Homeowners Are Saying
Tamer was great, changed our entire HVAC unit, which now works perfectly fine. Very professional service and very knowledgeable, would highly recommend them for HVAC services.
We had an air conditioner malfunction over a long weekend and Tamer was kind enough to come fix it the next day! It's been running great ever since!Update: Our furnace also ended up acting up, and we got the same great service fixing that.
Very knowledgeable technician, knows what need to resolved the issue, quick response and we'll in time as committed.
Excellent as always! On time. Extremely thorough. Double checked all areas of concern and made the appropriate repairs. You couldn't ask for a better HVAC provider.
Had an issue with my old AC. Tamer visited, provided the right suggestions and installed in a day. Great professional service and strongly recommended.
Tamas Mechanical,a good AC and heating mechanic he is doing very good job,i call emigeat response, make a appointment and done the jobs they work my two homes, I am settesfed his job.
Tamer is the friendliest and easiest person to deal with. He rearranged his schedule to accommodate mine. I recommend Tamas mechanical and will continue using for all my needs
Needed help getting our air conditioner working again, great service. Tamer knows his stuff, was thorough, clean and explained everything he was doing as he went along.
I've been having issues with poor airflow at a number of my vents in addition to some freezing in my furnace room in my home in Mississauga. I found Tamas Mechanical online. They have great reviews, and after speaking with Tamer and having him complete his diagnostic, I see why. Tamer was professional, patient, and fair throughout my engagement with him.Tamer quickly identified the issue and tweaked some settings to resolve it. I will be going back to Tamer for all my HVAC needs going forward!
Overall I had an excellent experience with Tamer installing a smart thermostat in my home. He was very polite, organized, knowledgeable and very easy to work with throughout the process. I have already booked him in to service the furnace for next season. I would highly recommend hiring him for any work needed.
The gentleman was very knowledgeable, experienced and extremely helpful. He was fast in repairing my gas leaking pipe. I plan to use him again in the future. His company deals with gas leaks, furnace maintenance, duct cleaning and air conditioning maintenance. I'm a very satisfied customer.
Tamer was excellent in diagnosing and fixing a complicated furnace issue we had. This was not my first time using Tamer and it won’t be my last. He is our go to guy for HVAC. Very professional, conscientious and good at what he does. Would highly recommend.
I hired Tamas Mechanical Inc., for furnace and duct cleaning. Tamer’s team, Mahdi and Blessing, did a great job. Mahdi was careful and efficient with his work. I also appreciated that they were respectful of us and cleaned up after the service. Tamer was very responsive when I was inquiring and booking. Had a smooth and easy experience with them. I highly recommend these guys and would hire them again in the future.
Tamer did the job perfectly, he came ontime and his dedication to do task properly was obvious. Highly recommended
Had a great experience with this company. I was having a BBQ at my new house in a couple of days and needed an HVAC company to install a new natural gas line for my BBQ. I put a request in Homwstars and got a call from Tamas very quickly and arranged for a technician to arrive the next day and provided a quote over the phone based on some photos and measurements. Tamer was the technician and took about half a day to install the new line which worked perfectly. One small issue was that my fireplace pilot went out during the installatio and I couldn't relight it. But Tamer came back to do a manual light at no extra charge. Very happy with the service, price and friendliness of staff.
Tamer was a helpful guy. Helped fix my problem within a couple of hours. Would recommend him for any hvac issues.
I was struck by how honest he was. Didn’t charge me for a small task months ago and quickly resolved an issue today. Good workmanship and great value. I’m happy to rely on Tamas for my HVAC needs.
Tamer is great and makes sure all your equipment is in running order. Way better deal than something like Reliance. Here is the Bryant AC unit that he installed for us.
Tamas Mechanical provided great service. Was able to get a quote over the phone with a few pictures and have them completed 2 days later. Amazing work!
We needed repair work done on our HVAC/furnace. He was quick to respond, and quick to get to the repair. The price was very reasonable for great and honest work. Tamer was exceptionally knowledgeable and will not give empty promises. He was detailed and transparent in showing and explaining what the problem is, what he would recommend, and also allowed me the option to choose which route I wanted to take to truly fix the problem. He does not give you the run-around and works as quickly as possible without compromising quality. We felt like we were truly taken cared of. On top of that, the repair was flawless! We highly recommend Tamas Mechanical, and will gladly use his service again (should we need future repairs/ installations).
Tamer was very responsive and took time to understand the air conditioning issues and set very realistic expectations based on facts. Scheduling a visit was quick and easy, he arrived on time and did what was needed quickly while also being patient and took time to answer all questions and explained the details in relation to possible replacement of our old A/C and Furnace without trying to oversell us on anything. We would definitely recommend Tamas to everyone if you want someone who is clearly hardworking, wants to earn an honest living and win customers over the right way! Thank you Tamer and really appreciate your time and effort, you will definitely be our go to person for any heating/cooling issues.
I received excellent advice from Tamer regarding what power/BTU furnace I should choose. Prior to calling Tamas Mechanical, I had called several other companies, where I was getting conflicting and not clear advice on what BTU size I should choose. However, Tamer was clear on what BTU size I should choose and fair in the pricing. I was able to get advice on a Monday morning and order the unit by Tuesday and fortunately they accommodated me and had it installed two days later! The furnace is currently working well and keeping us warm and I also have a new humidifier April air 500 series that was also recommended and seems to be making the air in our house better. I will now be getting my ducts cleaned by Thomas mechanical and look forward to this service from them. I highly recommend this company.
We had Tamas come out due to a leak. He was professionally, timely and super friendly again this time. We are very satisfied with the work he did.Tamas is a great guy. Very friendly and informative. He installed a tankless water heater for us which has been working great. Also gave us a great price compared to what we were being quoted by others. Will definetly use his services in the future.
Tamer was quick to come diagnose our furnace and very knowledgeable on what the problem was. He took the time to answer our questions and listened to our concerns. He stayed in contact and updated us about when the part was going to be available and it was a quick turn around. He was very accessible and efficient. We would definitely recommend and use tamer again!
Tamas Mechanical were a pleasure to deal with. They replied promptly to my request, showed up within 12 hours and diagnosed the problem. Although the repair was beyond their scope, they were honest and upfront and recommended another company. I would use in the future if the need arises and recommend to others.
Tamer Sayer was the technician who came to service my furnace. I should preface my furnace is 14 years old and two other companies failed to fix the issue. Tamer spent over two hours diagnosing the issue and fixing it. Three weeks later furnace is still running like new. Al very grateful 🙏
Tankless Water Heater Repair FAQs
How long does a tankless water heater repair usually take?
Most repairs can be completed within a few hours, depending on the issue and whether replacement parts are required.
Do you repair all brands of tankless water heaters?
Yes. Tamas Mechanical services and repairs most major tankless water heater brands installed in Mississauga homes.
What is the most common problem with tankless water heaters?
Mineral buildup inside the heat exchanger is one of the most common problems, especially in areas with hard water like Mississauga. It can reduce efficiency, restrict water flow, and affect heating performance.
What happens if a tankless water heater fails?
A failed tankless water heater may stop producing hot water, display an error code, or shut down completely. In some cases, you may also notice fluctuating water temperatures or reduced water flow.
Why is my tankless water heater not producing hot water?
Why is my tankless water heater not igniting?
This may be caused by a defective igniter, gas supply issues, clogged burners or a malfunctioning flame sensor.
How many years will a tankless water heater last?
A well-maintained tankless water heater typically lasts 15 to 20 years, which is generally longer than a traditional storage tank water heater.
How do I maintain a tankless water heater?
Schedule professional maintenance and descaling at least once a year to remove mineral buildup. You should also clean the water filter regularly and have the unit inspected to keep it operating efficiently.
How often should a tankless water heater be descaled?
In Mississauga where hard water is common, most manufacturers recommend professional descaling about once a year to maintain efficiency and prevent mineral buildup.
Can hard water damage a tankless water heater?
Yes. Mineral deposits can build up inside the heat exchanger, reducing efficiency and increasing the risk of component failure if regular maintenance is neglected.
Schedule Tankless Water Heater Repair in Mississauga
Don’t wait until you’re completely without hot water. Whether your tankless water heater is leaking, displaying error codes, or struggling to keep up with demand, Tamas Mechanical is ready to help. Contact our team today to schedule professional tankless water heater repair in Mississauga and restore dependable hot water to your home.