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How You Can Keep Your Tankless Water Heater Hot

Imagine stepping into a soothing, warm shower only to be greeted by a sudden rush of chilly water. It’s a frustrating scenario that can turn your daily routine into a discomforting experience. 

Tankless water heaters have become popular among homeowners due to their energy efficiency and on-demand water delivery. According to recent statistics, the tankless water heater market has witnessed substantial growth, with an estimated CAGR of 7.8% between 2021 and 2027.

This surge in popularity is attributed to their compact design, reduced energy consumption, and the promise of endless hot water supply. However, like any appliance, tankless water heaters can encounter issues, and one of the most common complaints is water not reaching the desired temperature.

If you’re facing the issue of your electric tankless water heater not getting hot enough as it should, you’re not alone. 

In this blog post, tankless water heater repair plumbers in Harrisonburg, VA, will help uncover the reasons behind this problem and offer solutions to help you regain that luxurious, hot water flow you deserve.

Different Between: Tank vs. Tankless Water Heater

Before delving into the possible causes behind “why is my tankless water heater not getting hot” as expected, it’s crucial to grasp the fundamental differences between two prominent types of water heating systems: the traditional and modern tankless water heater. These systems operate on different principles, each with its own set of advantages and drawbacks.

So, let’s lay the groundwork by exploring the key disparities between the conventional and the contemporary in the realm of water heating.

Aspect Tank Water Heater Tankless Water Heater
Heating Mechanism Heats and stores water in a reservoir, keeping it hot 24/7 Heats water on demand as it passes through the unit
Energy Efficiency Lower efficiency due to constant energy consumption Higher efficiency as it only heats water when needed
Space Requirement Bulkier requires more space for the storage tank Compact design saves space
Hot Water Supply Limited by tank size; can run out during heavy usage Continuous supply, no running out of hot water
Initial Cost Lower upfront cost Higher initial investment
Long-term Costs Higher energy bills due to constant heating Lower energy bills due to on-demand heating
Lifespan Around 10-15 years Around 20+ years
Maintenance Sediment buildup can affect the efficiency Less maintenance, but periodic descaling required
Environmental Impact Greater energy consumption and greenhouse gas emissions Lower energy usage and reduced environmental impact
Installation Flexibility Easier retrofitting due to common installation May require adjustments to the existing plumbing

Why is my tankless water heater not getting hot enough?

It can be frustrating if you’re having trouble with your tankless water heater. There are so many things going on in your home, and your tankless water heater is supposed to be reliable—so when it isn’t doing what it’s supposed to, it can feel like a major inconvenience.

But whether you’re dealing with low water pressure or you just want to make sure everything is working properly, there are some things you can do before calling a professional. In this article, we’ll go over 7 common problems that cause tankless water heaters not to be hot enough issues.

Inadequate Flow Rate

It is important to make sure that there is an adequate flow rate through your tankless water heater. If there isn’t enough flow and you are wondering, “Why am I not getting hot water from my tankless water heater,” then it will not be able to heat up as quickly or effectively. This can cause the unit to run inefficiently and also result in lower water temperature.

Sediment Buildup

When sediment builds up on the bottom of your tankless water heater, it blocks the heat exchanger from doing its job effectively. This means that the unit needs more energy to keep up with your needs, which can cause overheating and damage to other parts of the system as well.

Gas or Electric Issues

Gas-powered tankless water heaters rely on a steady supply of gas and a functioning burner for heating. If there’s an issue with the gas supply or the burner, the water might not heat properly, and you will end up thinking, “Why am I not getting hot water from my tankless water heater?”. Similarly, electric models could face problems with their heating elements, necessitating a thorough inspection by a tankless water heater professional.

Incorrect Temperature Settings

The first and most common reason your tankless water heater is not getting hot enough is incorrect temperature settings. The fact is, it’s really easy to set these things up incorrectly, and if you’ve just had the tankless installed, you may have forgotten to change those settings since the last time they were used. If you’re in doubt about whether or not your temperature settings are correct, call your Harrisonburg plumber. They can help you figure out what’s going on.

The Cold Water Sandwich Effect

When you have a tankless water heater, the coldest water in your house is used first, and then the hot water sits there until it’s used up. It’s like eating a sandwich made with ice cream and then waiting for your lunch to be ready—it’s going to take a little longer than if you had just eaten the sandwich right away. This is called the “cold water sandwich effect.” This also means that when you turn on your faucet, all you’ll get is room-temperature water—and no hot shower or bath!

Scaling and Mineral Deposits

Mineral deposits are hard deposits that build up on pipes over time, causing the water heater to lose efficiency and stop working properly. This buildup can cause clogs in your pipes as well as an inability for hot water to flow through them. Mineral deposits can also cause corrosion damage to parts inside your tankless water heater if left untreated for long periods. In order to prevent these types of issues from occurring in the future, you should make sure that you regularly inspect your pipes for signs of mineral buildup so that they do not become too large before fixing them yourself (or hiring someone else).

Overworked Unit

If your tankless water heater is constantly on and heating large amounts of cold water, it may be working harder than it can handle. Check your electric bill and see if you’ve recently used more energy than usual. If so, consider replacing your tankless with an electric one that has a higher capacity.

How To Fix A Tankless Water Heater Not Getting Hot Issue?

As you are probably well aware, a hot shower is one of life’s simplest and most pleasurable experiences.

Unfortunately, some people have had to deal with a less-than-ideal experience when it comes to their showers—namely, not being able to get them hot enough. That’s right: even if you’re running the water at full blast, sometimes your tankless water heater will just refuse to heat it up.

And what’s worse? It can be really hard to pin down why this is happening! Here are several ways to fix your tankless water heater not getting hot issue:

Check the Water Flow Rate

If you have a tankless water heater, but it’s not getting hot, it could be that the flow rate of water through the tankless heater isn’t high enough to heat it up.

Check your water pressure and make sure that it’s at least 50 PSI. If it’s not, then try adjusting your pressure regulator or installing a new one.

Adjust Temperature Settings

Your tankless heater might not be getting hot if you’ve set the temperature too low on your thermostat. Try raising it by 5° and see if that helps get things heating up again! If not, try switching from Fahrenheit to Celsius and lowering the temperature by 2° instead of 5°—this can help keep things working as intended!

Remove Sediment Buildup

Sometimes sediment buildup in your tankless hot water heater can cause it not to function properly. To remove this buildup, remove the sediment filter and wash it with warm water. Also, make sure that you clean any other filters that may be installed in the unit and the entire tankless hot water heater itself. 

Check for Gas or Electric Issues

If your tankless water heater Harrisonburg VA still isn’t heating up after following all of these steps, you may have a gas or electric issue with it. First, check to see if there is power going to the unit by turning on another appliance nearby that uses electricity, and if it turns on (you should hear a buzzing sound from both appliances). If there is power going to both devices, but nothing happens when you push the on switch on your tankless hot water heater, then you may need to contact an electrician or call a water heater plumbing company for assistance.

Address Cold Water Sandwich Effect

Sometimes when you turn on your tankless water heater, it may take longer than usual for the hot water to reach your home, and you think, “Why am I not getting hot water from my Rinnai tankless water heater?”. This is because the cold water sandwich effect occurs when cold water enters the house before hot water exits, causing cold air pockets to form in pipes that are waiting for hot water. To address this issue, try using a temperature-controlled faucet so that warm air can enter while hot water exits, which will help get rid of cold air pockets and speed up the flow of hot water into your home.

Perform a Full System Reset

To fix this issue, try performing a full system reset. This will help your tankless water heater run at its optimal level again, allowing you to enjoy a hot shower or bath every time! The full system reset can be done by following these steps:

Step 1: Turn off the power supply to the unit.

Step 2: Locate the circuit breaker or fuse box for your house and shut it off.

Step 3: Allow 30 minutes for the circuit breaker or fuse box to cool down before turning it back on and continuing with step 4 below.

Step 4: After waiting 30 minutes, turn the power supply back on and try to run water through your tankless heater again. If this doesn’t work, please continue reading for other possible fixes!

Contact Professional Help

If you’re having trouble getting your tankless water heater to heat up, you may want to call a professional tankless water heater repair plumber. A professional can diagnose the problem and make sure that it’s not something that can be easily fixed at home. If it is, they can help you with that too!

Preventive Maintenance

Preventive maintenance is one of the best ways to keep your tankless water heater running in a smooth manner for years to come. Your local plumber or HVAC technician like R.C. Gochenour and Son Plumbing LLC should be able to help you with this, but plenty of online resources are available if you prefer to take care of it yourself.

DIY Vs. Professional Tankless Water Heater Repair

When you have a problem with your tankless water heater, you have a choice: do it yourself or hire a professional. There are pros and cons to both options. If you choose to DIY, you will save money. However, if you choose to hire an expert technician, they can fix the problem quickly and efficiently without damaging your home or property. The choice is yours!

Here’s a quick comparison table outlining the key differences between attempting DIY (Do-It-Yourself) repairs and seeking professional assistance for tankless water heater issues so that you can make a decision:

Aspect DIY Tankless Water Heater Repair Professional Tankless Water Heater Repair
Skill and Knowledge Requires a good understanding of plumbing and heating systems Professionals have expertise and experience in repairing various heater models
Safety Concerns May involve working with gas or electricity, posing safety risks Professionals are trained to handle safety procedures and protocols
Initial Cost Generally lower cost, mainly involving materials for basic repairs Involves a service fee or hourly rate for professional expertise
Potential for Mistakes Risk of causing further damage or worsening the issue Professionals can accurately diagnose and address problems
Complex Issues Limited ability to handle complex or technical problems Equipped to deal with intricate issues and multiple causes
Time and Effort May take longer due to the learning curve and troubleshooting Professionals can quickly diagnose and repair the problem
Warranty Implications DIY repairs might void the manufacturer’s warranty Professionals often provide warranty on their services
Long-term Results Success depends on the individual’s skills and accuracy Professionals ensure lasting repairs and system efficiency
Emergency Situations Limited ability to handle urgent or unexpected breakdowns Professionals offer 24/7 emergency services if required
Extent of Repairs Suitable for minor issues like temperature adjustments Can handle various repairs, from minor to major overhauls
Peace of Mind Offers satisfaction from solving minor issues Provides confidence in accurate repairs and safety

When to Call Professional Tankless Water Heater Repair Plumber in Harrisonburg, VA!

If you have a tankless water heater and it’s not working, we’re here to help.

We know that when your tankless water heater isn’t working, it can be inconvenient and problematic. You might have to go without hot water, take cold showers—or worse, all of the above!

It’s no fun at all to deal with this kind of thing on your own. You need someone who knows what they’re doing, who can get right to work fixing your tankless water heater so that you can get back to enjoying your home and life again.

That’s why we’re here.

We’re R.C. Gochenour and Son Plumbing LLC, and we’re here to help with all kinds of plumbing issues, from tankless water heater repair to drain cleaning. We have the tools and knowledge necessary to get your tankless water heater up and running again.

We can help you with any of your Tankless Water Heater in Harrisonburg problems, including:

  • Tankless Water Heater Repair in Harrisonburg, VA
  • Tankless Water Heater Installation in Harrisonburg, VA
  • Tankless Water Heater Maintenance in Harrisonburg, VA
  • Tankless Water Heater Leaking or not working properly
  • Tankless Water Heater Burned out heating elements
  • No hot water or cold water from Tankless Water Heater
  • Clogged drains and toilets
  • Frozen pipes in the wintertime
  • Electrical problems
  • And many more…

We have been serving the community for many years now, and we have built a reputation on quality workmanship and great customer service. We pride ourselves on having never let our clients down—we’ll always treat your tankless heating system with the respect it deserves while ensuring that everything is done right the first time. 

Our licensed, bonded, and insured technicians are trained in all aspects of tankless repair and installation so that they can quickly diagnose and fix any problem with your system—whether it’s something simple like cleaning out sediment or something more complex like replacing an entire component of your plumbing setup.

Don’t wait until tomorrow to get help with your tankless water heater! Don’t try to do it yourself—a tankless water heater can be dangerous if you don’t know what you’re doing. Call us now at 540 271 3393, and let our licensed plumbers come out to your home or business to fix your broken tankless water heater today!

Harrisonburg plumber, plumber Harrisonburg, Shenandoah plumber, Massanetta Springs plumber, Bridgewater plumber

Serving Page and

Rockingham County

R.C. Gochenour and Son Plumbing LLC is proud to serve the plumbing needs of Harrisonburg and surrounding areas, including communities in Page County and Rockingham County.

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