One of the best things about a tankless water heater is having hot water when you need it. There’s no big tank taking up space, and you’re not paying to keep a full tank of water hot all day. It’s a pretty handy setup.
But like any hardworking appliance in your home, your tankless water heater needs a little attention now and then.
Over time, minerals from your water can build up inside the system. That buildup can make it harder for your water heater to do its job. You might notice changes in water temperature, lower water pressure, or a system that isn’t running quite like it used to.
The good news? Regular tankless water heater maintenance can help prevent many of these problems. And knowing when your system needs descaling can save you from bigger headaches down the road.
What Is Tankless Water Heater Descaling?
Every time you turn on the hot water, fresh water flows through your tankless system. As that water heats up, minerals like calcium and magnesium can leave deposits behind.
Over time, those deposits form a layer of scale inside the heat exchanger. That’s the part of your water heater that transfers heat to the water.
Think of it like the white, chalky buildup you sometimes see around faucets or showerheads. The same thing can happen inside your water heater, where you can’t see it.
As scale builds up, it can make heat transfer less efficient and restrict water flow. Your system may have to work harder to deliver the hot water you’re used to.
Tankless water heater descaling is the process of flushing those mineral deposits out of the system using a cleaning solution approved for your equipment.
It’s a common part of keeping your water heater in good working condition, especially in homes with mineral-rich water.
How Often Does a Tankless Water Heater Need Descaling?
There’s no single schedule that works for every home.
Some manufacturers recommend annual maintenance, while others base descaling on water quality and operating conditions. The right schedule depends on your system and how it’s used.
For many homes, having the system checked once a year is a good starting point. However, that doesn’t always mean it needs a full descaling every year.
A few things can affect how quickly mineral buildup develops.
Your Home’s Water Quality
Water naturally contains minerals, but the amount varies from one location to another.
Hard water contains higher levels of calcium and magnesium. When that water heats up, mineral deposits can form more quickly.
If your home has hard water, your tankless system may need descaling more often.
Water quality can vary throughout Abbotsford and the surrounding Fraser Valley. Your water source and treatment setup can also make a difference.
A plumber can help you understand whether your water quality calls for more frequent maintenance.
How Much Hot Water You Use
A busy household puts its water heater to work.
Between morning showers, laundry, dishes, and everything else, a lot of water can pass through the system each day.
The more water your heater processes, the more minerals can move through it.
That doesn’t mean using lots of hot water is a problem. It simply means a household with higher demand may benefit from more frequent service.
Your Water Heater’s Manufacturer
Different tankless water heaters have different maintenance needs.
Brands like Rinnai, Navien, and Noritz may have specific instructions for flushing, inspecting, and servicing their equipment.
Some models also have maintenance alerts that let you know when service may be needed. Following your manufacturer’s instructions helps protect your equipment and keeps you on track with its maintenance requirements.
5 Signs Your Tankless Water Heater May Need Descaling
Your water heater won’t always give you an obvious warning when minerals start building up.
However, there are a few changes worth paying attention to.
1. Your Hot Water Temperature Keeps Changing
Does your shower suddenly turn cooler, even though nobody else is using hot water?
Mineral buildup can affect how efficiently your system heats water. It may also interfere with water flow through the heat exchanger.
Temperature changes can have other causes, too. A professional inspection can help narrow things down.
2. Your Hot Water Pressure Seems Lower
If the hot water pressure at your taps or showerheads has dropped, scale could be restricting flow through the system.
Of course, low pressure can also come from plumbing issues, clogged fixtures, or other restrictions.
A plumber can check whether the problem is inside your water heater or somewhere else in your plumbing.
3. Your Water Heater Makes Unusual Noises
Tankless water heaters aren’t completely silent, but you probably know what yours normally sounds like.
If you start hearing new rattling, humming, or other unusual sounds, it’s worth having someone take a look.
Mineral deposits can sometimes contribute to noise, although there may be another issue that needs attention.
4. You’re Seeing Error Codes
Many modern tankless water heaters display error codes when something isn’t working properly.
Some codes relate to water flow, overheating, or other conditions that may be linked to scale buildup.
Rather than guessing what a code means, check your owner’s manual and arrange service when recommended.
5. Your System Isn’t Keeping Up Like It Used To
Maybe your hot water takes longer to reach the right temperature. Or perhaps your system struggles when several fixtures are running.
These changes don’t always mean you need descaling, but they’re good reasons to have your equipment checked. Regular tankless water heater maintenance helps catch these issues before they turn into more expensive repairs.
What Happens During Professional Tankless Water Heater Maintenance?
A professional maintenance visit involves more than simply running a cleaning solution through your water heater.
Your plumber will first look at the system’s condition and check for signs of trouble.
Depending on your model and the manufacturer’s requirements, service may include checking water connections, inspecting filters, looking for leaks, and reviewing error codes.
If descaling is needed, the plumber will isolate the unit and circulate an approved cleaning solution through the heat exchanger. This helps break down mineral deposits that have collected inside.
Once the flushing process is complete, the system is rinsed according to the manufacturer’s instructions.
Your plumber may also check the venting, combustion system, and other parts that affect safe operation.
Finally, they’ll test the water heater to make sure it’s operating as expected.
Not every service visit requires the same work. The goal is to give your particular system the care it needs.
Can You Descale a Tankless Water Heater Yourself?
Some manufacturers provide instructions for homeowners who want to flush their own equipment.
However, the process involves more than pouring a cleaning product into the system.
You need the right equipment, an approved cleaning solution, and a clear understanding of how to isolate and flush the unit safely.
Using the wrong product or following the wrong procedure can damage parts of your water heater.
Professional service also gives you the benefit of having someone check for problems that a basic flush might miss.
If you’re unsure about your system’s requirements, having a qualified plumber handle the work is a sensible choice.
When Should You Book Tankless Water Heater Service in Abbotsford?
If your water heater is running well, check your owner’s manual to see when maintenance is recommended.
If it’s been a year or more since your last inspection, it may be a good time to arrange a visit.
You should also book service if you’re noticing changes in temperature, reduced hot water flow, unusual noises, or recurring error codes.
And if you don’t know when your system was last serviced? That’s okay, too. A plumber can inspect it and help you work out a maintenance schedule.
The important thing is to deal with small issues while they’re still small.
Keep Your Hot Water Running Smoothly With TYS Plumbing & Heating
Your tankless water heater works hard to keep your household comfortable. A little routine care can go a long way toward keeping it reliable.
At TYS Plumbing & Heating, we believe in straightforward advice and doing the job right. We’ll take a look at your system, explain what we find, and let you know what it actually needs.
Whether it’s time for a routine inspection or you’re dealing with changes in your hot water, we’re happy to help.
Need tankless water heater maintenance in Abbotsford? Contact TYS Plumbing & Heating to book a service appointment and keep your hot water running the way it should.