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24/7 Certified Plumbing Services in Milton & Mississauga – Delex Plumbing

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Reliable Boiler Repair Mississauga

Free Quote 416-910-2550

Get Your Free Estimate Today!

Or Give Us A Call: 416-910-2550

Fast, Expert Boiler Repair in Mississauga

When your boiler stops working, your home can become uncomfortable in no time—especially during Ontario winters. At Delex Plumbing, we provide fast and expert boiler repair in Mississauga, with 24/7 emergency service to restore your heat quickly and safely.

All boiler brands and models, including combi, system, and conventional boilers, can be serviced by our certified boiler technicians. Whether it’s a gas or propane unit, we arrive equipped to detect and fix the issue on the spot. Safety is our top priority. We follow all local building codes and inspect every repair to ensure your home heating system is working efficiently and safely before we leave.

Boiler problems rarely wait for a convenient time. That’s why we offer round-the-clock availability and same-day service options. No heat? No problem. Delex Plumbing is ready when you need us most.

With a customer-first approach, we focus not just on solving your current issue but also on preventing future ones. We provide maintenance tips and answer your questions to ensure you’re confident in how your heating system works and how to identify signs of trouble early. Regular checkups help prevent more significant problems down the road, and we offer service packages to provide peace of mind throughout the year.

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Common Boiler Issues We Fix

Boiler issues can vary in severity, but the sooner they’re addressed, the better. Here are some of the most common problems we see:
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No Heat or Hot Water

One of the most evident signs of boiler trouble is a lack of heat or hot water. This can stem from a faulty thermostat, broken pump, or malfunctioning valves. In colder months, even a few hours without heat can make your home unlivable. We quickly diagnose and restore functionality to keep your family warm and your water hot.
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Leaking or Dripping

Leaks are never a good sign. Corrosion, broken seals, or internal component failure may cause them. Water leaks can also damage surrounding areas, such as flooring and drywall. Proper repair can prevent further water damage and extend the life of your boiler. If left unresolved, small leaks can lead to more significant mechanical failures or even mould issues.
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Strange Noises or Vibrations

Banging, gurgling, or whistling sounds usually indicate air in the system, kettling (limescale buildup), or loose parts. Unusual sounds are your boiler's way of signalling that something's wrong. We isolate the cause and eliminate the noise for quieter, more efficient performance. Addressing these early keeps your unit running longer and more efficiently.
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Pilot Light Issues

If your pilot light fails to ignite, it may be due to a damaged thermocouple, a draft issue, or problems with the gas supply. We'll relight and repair the system to ensure consistent ignition. A reliable pilot light is crucial to consistent heating, especially in older boiler models that don't use electronic ignition.
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Low Pressure or Fault Codes

Modern boilers display error codes when an issue arises. Low pressure, sensor faults, or blocked pipes are common triggers. Low pressure, for example, can mean your system isn't operating at full capacity. Our experts interpret the codes, perform a comprehensive diagnostic, and resolve the underlying issue to ensure your system operates safely and reliably.
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Why Choose Delex Plumbing for Boiler Repairs

Mississauga homeowners trust us for quick, dependable repairs that restore warmth and peace of mind. We bring both technical expertise and a customer-first approach to every service call.

  • Licensed & Certified Boiler Technicians – Trained experts with up-to-date certifications will service your boiler.
  • Emergency Heating Repair – When you need heat fast, we're available 24/7, even on weekends and holidays.
  • Transparent, Upfront Pricing – Know the cost before we start. No hidden fees, no surprises.
  • All Major Brands Supported – From Viessmann and Navien to Baxi and Bosch, we service them all.
  • Heat Restored Same Day – Our stocked service vehicles enable us to fix most issues on the first visit.
Customer service is at the core of everything we do. Our team is respectful of your time and property, wearing shoe covers, using drop cloths, and cleaning up thoroughly after each repair. We understand that heating issues are stressful, and our goal is to make the repair experience as smooth and reassuring as possible.

Our Recent Projects

Residential & Light Commercial Boilers We Service

Delex Plumbing repairs a wide range of boiler types for both homes and small businesses. Our team is familiar with every major model and configuration, including:
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Combi Boilers

Combi boilers are compact and reliable, providing hot water and heating from a single unit. Popular in smaller homes and condos, these systems can sometimes become overwhelmed with demand. We repair performance issues and component failures that affect both systems, helping to determine if your combi boiler is the right size for your needs.
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Conventional Boilers

These traditional systems use a hot water cylinder and a cold water tank. They are common in older homes and require specific expertise for effective repair. We fix issues with tank heating, circulation pumps, and thermostat controls. If your system is aging, we also consult on upgrade options for better efficiency.
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System Boilers

System boilers rely on a cylinder but don’t need a tank. They are a middle ground between conventional and combi systems. Our repairs include pressure issues, valve replacements, and circulation faults. System boilers are excellent for homes with multiple bathrooms—we ensure they deliver hot water when you need it most.
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Natural Gas & Propane Models

No matter the fuel source, we’re equipped to handle natural gas and propane boilers safely. From burner issues to gas valve replacements, we cover it all. Our technicians are trained in fuel safety procedures and certified to manage gas line inspections, pressure checks, and compliance reviews.

Book Boiler Repair in Mississauga

Is your boiler acting up? Don’t wait for a full breakdown. Book your boiler repair in Mississauga today with Delex Plumbing.

Call now or fill out our simple online form to schedule a technician. We offer same-day and emergency service options, ensuring your heating is restored quickly and safely. We provide every repair with a 100% satisfaction guarantee. Let us bring back the warmth—fast.

When you book with Delex Plumbing, you’re not just scheduling a fix—you’re choosing professionalism, safety, and expert care. From the first call to the completed repair, we keep you informed, respected, and comfortable. Contact us today and experience the difference a trusted local boiler repair company can make.

Mississauga Neighbourhoods We Serve

We proudly serve all neighbourhoods across Mississauga, including:

Location

Estimated Time

Port Credit

We will reach in 20 minutes

Erin Mills

We will reach in 30 minutes

Meadowvale

We will reach in 25 minutes

Cooksville

We will reach in 30 minutes

Streetsville

We will reach in 35 minutes

East Credit

We will reach in 35 minutes

Churchill Meadows

We will reach in 20 minutes

Clarkson

We will reach in 30 minutes

Lorne Park

We will reach in 35 minutes

Lakeview

We will reach in 40 minutes

Erindale

We will reach in 25 minutes

Mineola

We will reach in 35 minutes

Sheridan Park

We will reach in 20 minutes

Rockwood Village

We will reach in 25 minutes

Lorne Park Estates

We will reach in 35 minutes

Location

Estimated Time

Sheridan Homelands

We will reach in 30 minutes

Rockwood Village

We will reach in 20 minutes

Lorne Park Estates

We will reach in 25 minutes

Sheridan Park

We will reach in 25 minutes

Rattray Park Estates

We will reach in 35 minutes

Applewood Acres

We will reach in 30 minutes

Marvin Heights

We will reach in 20 minutes

Applewood Hills

We will reach in 25 minutes

Meadowvale West

We will reach in 35 minutes

Old Malton Village

We will reach in 40 minutes

Derry West

We will reach in 25 minutes

Eridale Woodlandsn

We will reach in 20 minutes

Dixie

We will reach in 25 minutes

Lisgar

We will reach in 35 minutes

Streetsville Junction

We will reach in 20 minutes

Our knowledge of each area—from the infrastructure challenges in older neighbourhoods to the plumbing features of new builds—enables us to provide faster and more effective service tailored to your specific needs.

Get Your Free Estimate Today!

Or Give Us A Call: 416-910-2550

Additional Plumbing Services We Provide

We offer an extensive selection of plumbing services, ensuring efficient, affordable, and long-lasting results for any project.
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