Tankless Water Heater Repair In Mississauga
If you’re dealing with tankless water heater problems, Real Deal HVAC provides reliable repair services throughout Mississauga and the surrounding areas. Our certified technicians have the experience to ensure your tankless system operates efficiently and safely. We handle issues such as sediment buildup, leaks, error codes, and gas line concerns. Whether you need routine maintenance or urgent repair, we restore your hot water quickly and professionally.


Common Tankless Water
Heaters Issues
Common Issues
Inconsistent Hot Water – Sudden bursts of cold water or fluctuating temperature often signal internal sensor issues. These problems disrupt comfort and reduce overall system efficiency.
Water Pooling or Leaks – Moisture near the unit may point to sediment buildup or a failing heat exchanger. Addressing leaks early prevents long-term damage.
Reduced Water Flow – A noticeable drop in hot water pressure can mean mineral buildup or clogged components. This limits performance and increases strain on your system.
Signs You Need Repair
Strange Noises – Clicking, rumbling, or buzzing sounds often indicate worn parts or trapped debris. These noises shouldn’t be ignored, as they can lead to larger issues.
Error Codes on the Display – Control panel alerts are your system’s way of warning you about malfunctioning components. A professional diagnosis ensures accurate, safe repairs.
Carbon Monoxide Concerns – In gas-powered systems, burner or gas line issues can create dangerous CO risks. Immediate service is required to keep your home safe.
When To Call Us?
Performance Drops – Slower heating or inconsistent temperature means your system is struggling. Professional inspection prevents further disruption to your hot water supply.
Persistent Leaks or Drips – Ongoing water issues point to internal component failure. Prompt repairs protect both your tankless unit and your home.
System Shutdowns – If your tankless heater turns off unexpectedly or won’t maintain heat, expert service is needed. Addressing the problem early keeps your unit running efficiently.
Tankless Water Heater Repair
Services For Homeowners
Same-Day Repair – We provide fast, same-day tankless water heater service to restore your hot water quickly. Our technicians diagnose issues on the spot and deliver reliable, efficient repairs.
Transparent Pricing – You get clear, upfront pricing with no hidden fees or surprises. Every repair comes with a detailed explanation so you know exactly what you're paying for.
Licensed Technicians – Our certified plumbers are trained to handle all tankless models and repair issues correctly the first time. You get safe, professional work that keeps your system running efficiently.


Regular Maintenance Services
For Energy Efficiency
• Boost Performance & Extend Lifespan
Regular maintenance prevents sediment buildup and protects the heat exchanger, helping your tankless system run efficiently for years.
• Prevent Leaks & System Issues –
We inspect for leaks, pressure problems, and early warning signs to keep your hot water system operating safely and without interruptions.
• Lower Energy Bills –
Proper calibration and routine tune-ups reduce energy use, ensuring consistent hot water while keeping monthly costs down.
Our 3 Step Repair Process
Step 1: Contact us – Call our certified water heater technicians to schedule your professional tankless water heater repair in Toronto.
Step 2: Quick Arrival – Our team arrives promptly to inspect your system, diagnose the issue and prepare for repair.
Step 3: Same Day Fix – We Fix most water heaters the same day, restoring reliable heat and hot water to your home.
Most Common Questions About Tankless Water Heater Repairs
What are common signs you need repair?
Inconsistent hot water, reduced flow rate, strange noises, or error codes often indicate a problem. Water leaks or sudden bursts of cold water are also clear signs your tankless system needs attention.
Why does the temperature keep fluctuating?
Temperature swings usually come from sediment buildup, a failing heat exchanger, or clogged filters. A technician can clean or replace the affected parts to restore steady hot water.
What causes low water flow in my water heater?
Low flow rate is often caused by mineral buildup, blocked inlet screens, or issues with the water filter. Regular maintenance keeps the system clean and helps maintain strong, consistent water flow.
Do you offer emergency services?
Yes. Real Deal HVAC provides fast emergency service for sudden hot water loss, leaks, or system shutdowns. We respond quickly so homeowners can restore reliable hot water without long delays.
How can I prevent future problems?
Routine maintenance, descaling, and annual inspections help keep your tankless unit running efficiently. Keeping the system clean protects the heat exchanger and ensures long-term performance and energy savings.
What are common signs you need repair?
Inconsistent hot water, reduced flow rate, strange noises, or error codes often indicate a problem. Water leaks or sudden bursts of cold water are also clear signs your tankless system needs attention.
Why does the temperature keep fluctuating?
Temperature swings usually come from sediment buildup, a failing heat exchanger, or clogged filters. A technician can clean or replace the affected parts to restore steady hot water.
What causes low water flow in my water heater?
Low flow rate is often caused by mineral buildup, blocked inlet screens, or issues with the water filter. Regular maintenance keeps the system clean and helps maintain strong, consistent water flow.
Do you offer emergency services?
Yes. Real Deal HVAC provides fast emergency service for sudden hot water loss, leaks, or system shutdowns. We respond quickly so homeowners can restore reliable hot water without long delays.
How can I prevent future problems?
Routine maintenance, descaling, and annual inspections help keep your tankless unit running efficiently. Keeping the system clean protects the heat exchanger and ensures long-term performance and energy savings.
Comprehensive Heating &
Air Conditioning Solutions
Our team provides full heating and air conditioning services, including furnace maintenance and AC repair, to keep your HVAC system running efficiently year-round. If you want to improve home comfort, our technicians can recommend upgrades or targeted repairs.
We also offer plumbing services such as gas line inspections, water softeners, and water filter installations. For hot water upgrades, we can replace your traditional tank with a high-efficiency tankless unit. With decades of experience, we deliver professional solutions built for long-term reliability.


Our Tankless Water Heater Repair Process
Step 1: Full Systems Assessment
We inspect your tankless system to identify the root cause of the issue, checking the heat exchanger, gas burner, sensors, and flow components to ensure nothing is overlooked.
Step 2: Full System Clean & Fix
We remove sediment buildup, address hard water issues, and replace clogged filters or faulty sensors to restore proper water flow and heating performance.
Step 3: System Calibration
We test the pressure relief valve, verify safe gas operation, and calibrate temperature settings to ensure steady output and efficient hot water delivery.
Step 4: Final Testing
After repairs, we run a full system test to confirm stable water flow, reliable heating, and safe operation so your home receives endless hot water with confidence.
Contact Us For Your
Tankless Water Heater Repair
When you need reliable tankless water heater repair or maintenance, Real Deal HVAC delivers fast, expert service in Mississauga and nearby areas. Our licensed plumbers offer same-day appointments, easy online booking, and transparent pricing with no hidden fees.
Don’t let hot water issues affect your home comfort. Contact Real Deal HVAC today for efficient, professional service you can trust, and enjoy consistent hot water and long-term energy savings.


Tankless Water Heater Repair In Mississauga
Are you dealing with tankless water heater problems in your home? At Real Deal HVAC, we specialize in providing reliable tankless water heater repair services to homeowners in Mississauga and surrounding areas. With years of experience and a team of certified technicians, we ensure your tankless unit operates efficiently and effectively.
Our professional plumbers are equipped to handle various issues, from sediment buildup and water leaks to gas line inspections and error codes. Whether you need regular maintenance or emergency service, we’re here to provide peace of mind and restore your hot water supply quickly and safely.
Common Tankless Water Heaters Issues
Common Issues
Inconsistent Hot Water – Sudden temperature swings often indicate failing sensors or internal component issues. This reduces comfort and overall system efficiency.
Water Pooling or Leaks – Moisture near the unit usually points to sediment buildup or a failing heat exchanger. Fixing leaks early prevents long-term damage.
Reduced Water Flow – Low water pressure often signals mineral buildup or clogged components. This limits performance and strains your system.
Signs You Need Repair
Banging or Rattling Sounds – Loose parts, a cracked heat
Exchanger or blower motor issues can cause loud, disruptive noises.
Burning or Electrical Odour – Dust or wiring problems can produce
burning smells when your furnace cycles on.
Rotten Egg Smell – A sulphur odour may indicate a gas leak
and needs immediate emergency furnace repair for safety.
Turn off your systems and call Real Deal HVAC immediately.
When To Call Us?
Performance Drops – Slower heating or inconsistent temperature means your system is struggling. Professional inspection prevents further disruption to your hot water supply.
Persistent Leaks or Drips – Ongoing water issues point to internal component failure. Prompt repairs protect both your tankless unit and your home.
System Shutdowns – If your tankless heater turns off unexpectedly or won’t maintain heat, expert service is needed. Addressing the problem early keeps your unit running efficiently.
When it comes to tankless water heater repair, Real Deal HVAC stands out as the trusted choice for homeowners in Mississauga. We understand the importance of having an efficient hot water system that meets your household’s needs. Our skilled technicians are trained to work on all types of tankless systems, ensuring that your unit delivers endless hot water whenever you need it.
We offer same-day service and reliable solutions tailored to your tankless water heater needs. Whether you’re facing reduced water flow, sediment buildup, or error codes, our licensed plumbers have the expertise to diagnose and resolve the issue efficiently. With no hidden fees and a commitment to customer satisfaction, we deliver peace of mind with every repair.
Expert Tankless Water Heater Repair Services for Homeowners
Regular maintenance is essential to keep your tankless water heater functioning efficiently and to prevent costly repairs. At Real Deal HVAC, we provide professional tankless water heater maintenance services to help homeowners in Toronto extend the lifespan of their systems and reduce energy costs. With our expert care, you can ensure that your demand water heaters deliver a consistent hot water supply while maintaining peak performance.
Our maintenance services include cleaning the system to prevent sediment buildup, which can harm the heat exchanger and reduce overall efficiency. We also inspect your water systems for leaks, pressure issues, and other potential problems, ensuring that your unit operates without interruption. By improving water quality and addressing hard water concerns, we help protect your investment and promote energy efficiency.
With our skilled technicians, we ensure that your tankless unit is calibrated to meet your household’s demand for endless hot water. Regular inspections and system optimization can significantly reduce energy bills, providing you with long-term energy savings and peace of mind. Trust Real Deal HVAC to handle your maintenance needs and keep your hot water system running smoothly for years to come.
Regular Maintenance Services
for Energy Efficiency
Contact Real Deal HVAC in Mississauga
For Your Repair Needs
When you need reliable tankless water heater repair or maintenance, trust Real Deal HVAC to deliver expert solutions in Mississauga and surrounding areas. Our professional plumbers are available for same-day service, and you can easily book online to schedule a visit at your convenience. With a focus on customer satisfaction and no hidden fees, we ensure a hassle-free experience for all your water heater needs.
Don’t let water heater problems disrupt your home comfort. Contact Real Deal HVAC today for fast, efficient, and trustworthy service. Let our certified technicians handle your repairs and maintenance, so you can enjoy consistent hot water and energy efficiency throughout the year.
Most Common Questions About
Tankless Water Heater Repairs
What are the most common signs my tankless water heater needs repair?
Inconsistent hot water, reduced flow rate, strange noises, or error codes often indicate a problem. Water leaks or sudden bursts of cold water are also clear signs your tankless system needs attention.
Why am I getting fluctuating temperatures from my tankless system?
Temperature swings usually come from sediment buildup, a failing heat exchanger, or clogged filters. A technician can clean or replace the affected parts to restore steady hot water.
What causes low water flow from my tankless water heater?
Low flow rate is often caused by mineral buildup, blocked inlet screens, or issues with the water filter. Regular maintenance keeps the system clean and helps maintain strong, consistent water flow.
Do Tankless Water Heaters Save Energy?
Yes. Real Deal HVAC provides fast emergency service for sudden hot water loss, leaks, or system shutdowns. We respond quickly so homeowners can restore reliable hot water without long delays.
What Tankless Water Heater Brands Do You Install?
Routine maintenance, descaling, and annual inspections help keep your tankless unit running efficiently. Keeping the system clean protects the heat exchanger and ensures long-term performance and energy savings.
What are the most common signs my tankless water heater needs repair?
Inconsistent hot water, reduced flow rate, strange noises, or error codes often indicate a problem. Water leaks or sudden bursts of cold water are also clear signs your tankless system needs attention.
Why am I getting fluctuating temperatures from my tankless system?
Temperature swings usually come from sediment buildup, a failing heat exchanger, or clogged filters. A technician can clean or replace the affected parts to restore steady hot water.
What causes low water flow from my tankless water heater?
Low flow rate is often caused by mineral buildup, blocked inlet screens, or issues with the water filter. Regular maintenance keeps the system clean and helps maintain strong, consistent water flow.
Do Tankless Water Heaters Save Energy?
Yes. Real Deal HVAC provides fast emergency service for sudden hot water loss, leaks, or system shutdowns. We respond quickly so homeowners can restore reliable hot water without long delays.
What Tankless Water Heater Brands Do You Install?
Routine maintenance, descaling, and annual inspections help keep your tankless unit running efficiently. Keeping the system clean protects the heat exchanger and ensures long-term performance and energy savings.
Our team specializes in heating and air conditioning solutions, including furnace maintenance and air conditioner repair. We ensure that your HVAC system operates efficiently throughout the year, providing reliable heating and cooling when you need it most. If you’re looking to improve your home comfort, our HVAC technicians can recommend upgrades or repairs tailored to your needs.
For plumbing services, we handle everything from gas line inspections to water softener and water filter installations. If you’re considering a hot water system upgrade, we can replace your traditional tank with a high-efficiency tankless unit. With decades of experience and a commitment to customer satisfaction, we provide professional solutions that deliver long-term benefits.
Comprehensive Heating and
Air Conditioning Solutions
Our Tankless Water Heater Repair Process
Step 1: Full Systems Assessment
We begin with a complete inspection of your tankless system to identify the root cause of the issue. Our technicians carefully assess components like the heat exchanger, gas burner, and gas line to ensure nothing is overlooked.
Step 2: Component Testing
Next, we check for sediment buildup, hard water issues, and worn sensors that may be limiting performance. We clean or replace temperature sensors, water filters, and other affected parts to restore proper flow and efficiency.
Step 3: System Calibration
We inspect the pressure relief valve, confirm gas line safety, and test the hot water tap to verify steady output. Proper calibration ensures consistent hot water delivery and improves long-term energy savings.
Step 4: Final Testing
Once repairs are complete, we run a full performance test to confirm stable water flow, reliable heating, and overall system health. Your technician ensures everything is functioning at peak performance so your home receives endless hot water with confidence.

Tankless Water Heater Repair In Mississauga
Are you dealing with tankless water heater problems in your home? At Real Deal HVAC, we specialize in providing reliable tankless water heater repair services to homeowners in Mississauga and surrounding areas. With years of experience and a team of certified technicians, we ensure your tankless unit operates efficiently and effectively.
Our professional plumbers are equipped to handle various issues, from sediment buildup and water leaks to gas line inspections and error codes. Whether you need regular maintenance or emergency service, we’re here to provide peace of mind and restore your hot water supply quickly and safely.
Common Tankless Water Heaters Issues
Common Issues
Inconsistent Hot Water – Sudden temperature swings often indicate failing sensors or internal component issues. This reduces comfort and overall system efficiency.
Water Pooling or Leaks – Moisture near the unit usually points to sediment buildup or a failing heat exchanger. Fixing leaks early prevents long-term damage.
Reduced Water Flow – Low water pressure often signals mineral buildup or clogged components. This limits performance and strains your system.
Signs You Need Repair
Strange Noises – Clicking, rumbling, or buzzing sounds from the unit often mean debris or worn parts. Ignoring these noises can lead to major failures.
Error Codes – Display warnings signal internal malfunctions or sensor issues. Professional diagnostics ensure accurate, safe repairs.
Carbon Monoxide Concerns – Gas-powered units with burner or vent issues may pose safety risks. Immediate service is required to keep your home safe.
When To Call Us?
Performance Drops – Slower heating or temperature inconsistency means your system is struggling. Early inspection prevents complete failure.
Leaks or Drips – Ongoing moisture or water loss signals internal component damage. Prompt repair protects your home and system.
System Shutdowns – If the unit turns off unexpectedly or won’t maintain heat, professional service is needed. Addressing issues early keeps your tankless heater running efficiently.
Expert Tankless Water Heater Repair Services For
Homeowners
When it comes to tankless water heater repair, Real Deal HVAC stands out as the trusted choice for homeowners in Mississauga. We understand the importance of having an efficient hot water system that meets your household’s needs. Our skilled technicians are trained to work on all types of tankless systems, ensuring that your unit delivers endless hot water whenever you need it.
We offer same-day service and reliable solutions tailored to your tankless water heater needs. Whether you’re facing reduced water flow, sediment buildup, or error codes, our licensed plumbers have the expertise to diagnose and resolve the issue efficiently. With no hidden fees and a commitment to customer satisfaction, we deliver peace of mind with every repair.

Regular Maintenance Services For Energy Efficiency
Regular maintenance is essential to keep your tankless water heater functioning efficiently and to prevent costly repairs. At Real Deal HVAC, we provide professional tankless water heater maintenance services to help homeowners in Toronto extend the lifespan of their systems and reduce energy costs. With our expert care, you can ensure that your demand water heaters deliver a consistent hot water supply while maintaining peak performance.
Our maintenance services include cleaning the system to prevent sediment buildup, which can harm the heat exchanger and reduce overall efficiency. We also inspect your water systems for leaks, pressure issues, and other potential problems, ensuring that your unit operates without interruption. By improving water quality and addressing hard water concerns, we help protect your investment and promote energy efficiency.
With our skilled technicians, we ensure that your tankless unit is calibrated to meet your household’s demand for endless hot water. Regular inspections and system optimization can significantly reduce energy bills, providing you with long-term energy savings and peace of mind. Trust Real Deal HVAC to handle your maintenance needs and keep your hot water system running smoothly for years to come.
Our 3 Step Repair Process
Step 1: Contact us – Call our certified water heater technicians to schedule your professional tankless water heater repair in Toronto.
Step 2: Quick Arrival – Our team arrives promptly to inspect your system, diagnose the issue and prepare for repair.
Step 3: Same Day Fix – We Fix most water heaters the same day, restoring reliable heat and hot water to your home.
Most Common Questions About
Tankless Water Heater Repairs
What are the most common signs my tankless water heater needs repair?
Inconsistent hot water, reduced flow rate, strange noises, or error codes often indicate a problem. Water leaks or sudden bursts of cold water are also clear signs your tankless system needs attention.
Why am I getting fluctuating temperatures from my tankless system?
Temperature swings usually come from sediment buildup, a failing heat exchanger, or clogged filters. A technician can clean or replace the affected parts to restore steady hot water.
What causes low water flow from my tankless water heater?
Low flow rate is often caused by mineral buildup, blocked inlet screens, or issues with the water filter. Regular maintenance keeps the system clean and helps maintain strong, consistent water flow.
Do you offer emergency service for tankless repairs?
Yes. Real Deal HVAC provides fast emergency service for sudden hot water loss, leaks, or system shutdowns. We respond quickly so homeowners can restore reliable hot water without long delays.
How can I prevent future problems with my tankless system?
Routine maintenance, descaling, and annual inspections help keep your tankless unit running efficiently. Keeping the system clean protects the heat exchanger and ensures long-term performance and energy savings.
Comprehensive Heating &
Air Conditioning Solutions
Our team specializes in heating and air conditioning solutions, including furnace maintenance and air conditioner repair. We ensure that your HVAC system operates efficiently throughout the year, providing reliable heating and cooling when you need it most. If you’re looking to improve your home comfort, our HVAC technicians can recommend upgrades or repairs tailored to your needs.
For plumbing services, we handle everything from gas line inspections to water softener and water filter installations. If you’re considering a hot water system upgrade, we can replace your traditional tank with a high-efficiency tankless unit. With decades of experience and a commitment to customer satisfaction, we provide professional solutions that deliver long-term benefits.

Our Tankless Water Heater Repair Process
Step 1: Full Systems Assessment
We begin with a complete inspection of your tankless system to identify the root cause of the issue. Our technicians carefully assess components like the heat exchanger, gas burner, and gas line to ensure nothing is overlooked.
Step 2: Component Testing & Cleaning
Next, we check for sediment buildup, hard water issues, and worn sensors that may be limiting performance. We clean or replace temperature sensors, water filters, and other affected parts to restore proper flow and efficiency.
Step 3: System Calibration & Tune-up
We inspect the pressure relief valve, confirm gas line safety, and test the hot water tap to verify steady output. Proper calibration ensures consistent hot water delivery and improves long-term energy savings.
Step 4: Final Testing & Optimization
Once repairs are complete, we run a full performance test to confirm stable water flow, reliable heating, and overall system health. Your technician ensures everything is functioning at peak performance so your home receives endless hot water with confidence.
Contact Real Deal HVAC In Mississauga For Your Repair Needs
Enjoy Endless Hot Water & Energy Efficiency
When you need reliable tankless water heater repair or maintenance, trust Real Deal HVAC to deliver expert solutions in Mississauga and surrounding areas. Our professional plumbers are available for same-day service, and you can easily book online to schedule a visit at your convenience. With a focus on customer satisfaction and no hidden fees, we ensure a hassle-free experience for all your water heater needs.
Don’t let water heater problems disrupt your home comfort. Contact Real Deal HVAC today for fast, efficient, and trustworthy service. Let our certified technicians handle your repairs and maintenance, so you can enjoy consistent hot water and energy efficiency throughout the year.
Book Your HVAC Service Now
Email Address:
Phone Number:
Office Address:
Book Your HVAC Service Now
Email Address:
Phone Number:
Book Your HVAC Service Now
Email Address:
Phone Number:
Office Address:

