8 Common Issues With Tankless Water Heaters

Key Takeaways:

  • Descaling a water heating system is an integral part of its maintenance.
  • Doing so periodically can extend the life span of your heating system and save you money in the long run.
  • Professional heating and cooling services are recommended for this task as they can access specialized tools and expertise that DIY descaling does not provide.
  • Regular maintenance with a dependable technician should be scheduled whenever necessary.
  • Doing so ensures that your water heater runs smoothly for years without costly breakdowns or repairs.

Tankless water heaters are becoming increasingly popular as an essential element of modern homes. The ability to heat water on demand makes them more efficient than traditional storage tank models. Tankless water heaters provide a continuous hot water supply, eliminating the need for energy-consuming reheating cycles. They are also much more space-efficient than their traditional counterparts. With no bulky tank taking up valuable floor space, they can easily fit in small.

 If you’ve had yours for a while, you may have encountered some problems. Fortunately, tankless water heaters are relatively easy to troubleshoot and repair. Let’s discuss important information, including common issues with tankless water heaters, so you know what to expect.

Issues With Tankless Water Heaters

1. System Overload

System overload is a common issue with tankless water heaters. This happens when too many hot water devices are used simultaneously, leading to inconsistent heating and inadequate hot water flow.

The good news is that heating and cooling services can help address this issue. They’ll have the tools and expertise needed to resolve it, so you don’t experience further problems.

2. Mineral Buildup

Another common issue is mineral buildup. This occurs when calcium, magnesium, and other minerals accumulate in the heating elements of your tankless water heater. Over time, this can lead to clogged pipes and reduced heating efficiency.

The best solution for this problem is to descale your water heater regularly. This involves flushing out the heating elements with an alkaline-based solution to remove the buildup. Professional heating and cooling services are the safest option if you’re uncomfortable doing it yourself.

3. The Exhaust or Air Supply Is Blocked.

The heating elements, condensate drain, or air supply of your water heater can become blocked by dust or debris. This reduces heating efficiency and causes problems with the performance of the unit.

4. Ignition Failures

A failing ignition can cause a delay in heating or cause the heating process to fail altogether. This is a typical water heater problem, and it’s essential to get professional heating and cooling services when tackling this issue.

5. Cold Water Sandwiching

This is known as a cold-water sandwich when cold water appears in the middle of your hot water flow. It’s caused by a lack of heating power or when the heating elements have become blocked over time. Professional services can help identify and rectify these problems quickly.

6. Temperature Fluctuation

Suppose you are experiencing temperature fluctuations from one shower to another. In that case, it could be a problem with your thermostat or heating element. Getting professional heating and cooling services to assess the situation before attempting any DIY measures.

7. Noises

One indicator that your water heater is failing is strange noises. This can range from rattling, banging, screeching, or whistling. Sometimes, it is caused by a loose heating element or sediment buildup leading to excessive pressure in the tankless water heater. Professional services can diagnose and repair this issue quickly and efficiently.

8. Flame Failure

Insufficient heating, a faulty gas regulator, or incorrect heating element installation can cause a flame failure. Suppose your water heater is not heating up to the set temperature. In that case, it’s best to call a professional for an assessment.

What Is Water Heater Descaling, And Why Is It Important?

Water heater descaling removes built-up sediments in the heating tank. Sediment can cause many common issues, such as water temperature inconsistency, noise, or excessive pressure. Descaling removes the buildup and helps ensure your water heating system runs smoothly and efficiently over time.

What Are the Costs of Descaling?

The cost for water heater descaling depends on several factors, including location, size of the heating unit, and how much labor is required. On average, descaling will cost between $150 and $250 for standard heating tanks. Expect to pay more than this amount for a large heating tank or one with an extended warranty covering parts and labor.

Are you looking for more information about the kind of water heater that best suits your needs? Read more here.


Why Choose Professional Heating and Cooling Services for Water Heater Maintenance


Don’t risk damaging your water heating system by attempting DIY descaling. Professional heating and cooling technicians have the proper training and equipment to complete maintenance tasks quickly and safely.


Most professionals will offer a warranty on their work. If something goes wrong after the descaling process, the heating system can be inspected and repaired without additional cost.

Time Savings

Hiring a professional heating and cooling technician for water heater maintenance can save you time. They’ll be able to quickly get your water heating system back up and running so you can resume normal operations without delay.

Peace Of Mind

Regarding water heater maintenance, there is always some risk involved with DIY repairs. Professional services are insured, which gives you peace of mind knowing that they’ll stand behind their work if something goes wrong. In addition, they’re well-experienced and certified to provide services, so you can trust that your water heating system is in good hands.

Cost Savings

When it comes to maintenance, hiring a professional heating and cooling technician is often more cost-effective than attempting DIY repairs. Experienced technicians know the latest techniques for water heating systems, allowing them to complete the job quickly and efficiently with fewer materials. This results in cost savings for both time and materials expended on the project.

In conclusion, descaling your tankless water heater is essential in prolonging its life span. Hiring a professional heating and cooling technician for this task can save you money in the long run due to their expertise and access to specialized tools. With their help, you can ensure that your water heater runs smoothly for years without any costly breakdowns or repairs.

Keeping your water heating system in proper working order can extend its life and avoid costly repairs or replacements. Professionals provide the most cost-effective way of achieving this goal, so schedule regular maintenance with a dependable technician whenever necessary.Daigle Plumbing, Heating & Cooling has provided authentic HVAC and plumbing services to clients in Londonderry, NH, for over 40 years. If you’re looking to get your plumbing or HVAC systems repaired or replaced, get a free estimate today