Comprehensive Guide to Tankless Water Heater Maintenance in Niagara

Tankless water heaters make a fantastic upgrade for homes in the Niagara Region. They provide endless hot water and improve energy efficiency. However, like any high-performance system, they require regular maintenance to keep them running smoothly. At PLUMR (Canalside Mechanical LTD), homeowners in St. Catharines, Niagara Falls, Welland, Thorold, Fort Erie, Port Colborne, Grimsby, Beamsville, Lincoln, and Pelham often seek advice on how to care for their tankless units.

Here’s your comprehensive guide on keeping your tankless water heater in top shape. We'll explain why descaling and maintenance are essential.

Importance of Tankless Water Heater Maintenance

Unlike traditional tank heaters, tankless systems don’t store water. Instead, they heat it on demand through high-efficiency heat exchangers. Over time, minerals — especially in Niagara’s hard water — can build up inside the unit, which reduces performance.

Without regular maintenance, you may experience several issues, including:

• Reduced water flow

• Lukewarm water

• Increased energy bills

• A shortened lifespan of the unit

• Risk of costly breakdowns

  
  

Key Maintenance Tasks for Tankless Water Heaters

1️⃣ Descaling (Flushing)

Hard water minerals like calcium and magnesium can accumulate on the heat exchanger. This buildup forces the unit to work harder, reducing efficiency and risking damage.

How Often Should You Descale?

• Annually is recommended for most homes.

• Every 6 months is advisable if you have very hard water or high usage.

  
  

What We Do

At PLUMR, we connect a pump to flush the system with a descaling solution, which is typically food-grade vinegar or a commercial descaler. This process removes the mineral buildup, restoring efficiency. For example, we recently flushed a unit in Grimsby that hadn’t been serviced in four years. After cleaning, the homeowner immediately noticed hotter water and faster flow.

2️⃣ Cleaning the Inlet Filter

Tankless systems come with a small screen filter on the cold-water inlet. This component traps debris and sediment.

How Often Should You Clean it?

• Every 6 to 12 months.

  
  

What We Do

We remove, rinse, and clean the inlet filter to ensure good water flow and prevent clogs.

3️⃣ Inspecting the Venting and Exhaust

Proper venting is crucial for safety and efficiency. Any blockages or damage can lead to dangerous backdrafting or carbon monoxide issues.

How Often Should You Inspect?

• Annually, especially before winter.

  
  

What We Do

We check the vent pipes for blockages, such as bird nests or leaves, and inspect seals and joints for leaks.

4️⃣ Checking the Burner and Heat Exchanger

A dirty burner can affect ignition and efficiency.

What We Do

We inspect and clean the burner assembly and check the heat exchanger for signs of corrosion or damage.

Signs Your Tankless Water Heater Needs Maintenance

It's important to recognize the signs that indicate your tankless water heater needs maintenance. Look out for:

• Fluctuating water temperature

• Reduced hot water flow

• Error codes on the display

• Strange noises (like rumbling or clicking)

• Rising energy bills

  
  

If you notice any of these issues, it’s time to call in a professional.

Can You DIY Tankless Water Heater Maintenance?

Some homeowners attempt to flush their units themselves. However, professional servicing ensures:

• Proper descaling with safe, effective solutions

• Thorough inspection of all components

• Warranty protection (many manufacturers require proof of professional maintenance)

  
  

Why Niagara Homes Need Regular Descaling

The water in our region falls under the category of moderately to very hard, depending on your municipality. This mineral composition leads to faster buildup and makes a stronger case for annual professional flushing.

Tip from PLUMR: Consider installing a whole-home water softener. This addition can drastically reduce scale buildup in your water heater and plumbing system.

Trust PLUMR for Expert Tankless Water Heater Maintenance

We’ve serviced tankless units all across the Niagara Region — from new installs in Beamsville to 10-year-old systems in St. Catharines. Our dedicated team offers:

✔️ Thorough descaling and flushing

✔️ Comprehensive inspections

✔️ Upfront pricing with no surprises

✔️ Friendly, local service backed by experience

Final Thoughts

Your tankless water heater is an important investment. Protect it with regular maintenance and descaling. Proper care can extend the life of your unit, improve performance, and save you money over time.

If you’re in St. Catharines, Niagara Falls, Welland, Thorold, Fort Erie, Port Colborne, Grimsby, Beamsville, Lincoln, or Pelham, contact PLUMR today to schedule your annual service. We’ll keep your hot water flowing — reliably and efficiently.