Repair Solutions for Tankless Water Heaters

Tankless water heaters are a smart choice for many homes and businesses. They provide hot water on demand, save space, and can lower energy bills. But like any appliance, they can run into problems. When that happens, knowing how to handle repairs can save you time, money, and stress. Let’s dive into some common issues and effective repair solutions for tankless water heaters.

Understanding Common Problems When Repairing Tankless Heaters

Tankless water heaters are reliable, but they do face a few typical issues. Knowing these can help you spot trouble early and decide if a quick fix is possible or if you need professional help.

• No Hot Water or Inconsistent Temperature

This is the most obvious sign something’s wrong. It could be due to a faulty thermostat, a clogged filter, or mineral buildup inside the unit. Sometimes, the heater’s sensors or flow switches fail, causing the system to shut down or not heat properly.

• Water Flow Issues

If the water pressure is low or the flow is uneven, the heater might not activate correctly. This can happen if the inlet filter is dirty or if there’s a blockage in the pipes.

• Error Codes and System Shutdowns

Modern tankless heaters often display error codes when something goes wrong. These codes can point to issues like overheating, ignition failure, or electrical problems.

• Strange Noises

Rumbling, popping, or hissing sounds usually mean mineral deposits are building up inside the heat exchanger. This buildup reduces efficiency and can damage the unit over time.

• Leaks

Water leaks around the heater can come from loose connections, damaged pipes, or internal component failure.

Tankless water heater with visible pipes and connections

Step-by-Step Guide to Repairing Tankless Heaters

When you notice a problem, it’s tempting to call a pro right away. But some repairs are straightforward and safe to do yourself. Here’s a simple guide to get you started:

1. Turn Off Power and Water Supply

   Safety first. Always switch off the power to the heater and shut off the water before inspecting or working on it.

   
   

2. Check and Clean the Inlet Filter

   The inlet filter traps debris that can clog the system. Remove it and rinse under running water. This simple step often restores proper flow.

   
   

3. Flush the System to Remove Mineral Buildup

   Hard water causes scale buildup inside the heat exchanger. Flushing the system with a vinegar solution or a descaling agent can clear this out.

4. Attach a pump to circulate the solution through the heater.

5. Run the pump for about 45 minutes.

7. Rinse thoroughly with clean water.




8. Inspect Electrical Components

   Look for loose wires, burnt connectors, or blown fuses. Tighten connections and replace damaged parts if you feel comfortable doing so.

   
   

9. Reset the Unit

   Many tankless heaters have a reset button. Pressing it can clear minor faults and restart the system.

   
   

10. Test the Heater

    Turn the power and water back on. Check if the heater runs smoothly and delivers hot water consistently.

    
    

If these steps don’t fix the problem, it’s time to consider professional help.

Tankless water heater installed by us

Who do I call if my tankless water heater isn't working?

When DIY fixes don’t cut it, you want a reliable expert who knows tankless water heaters inside and out. Calling a professional ensures the job is done right the first time. Plus, it protects your warranty and prevents further damage.

For anyone in Lafayette, LA, and nearby areas, I recommend reaching out to Matthew & Sons Plumbing. They specialize in tankless water heater repair and service. Their team is experienced, friendly, and ready to handle everything from small repairs to full replacements.

Why risk a costly mistake? A trusted plumber can quickly diagnose the issue, provide clear options, and get your hot water flowing again without hassle.

Professional plumbers installing a tankless water heater unit

Tips to Prevent Future Repairs and Extend Your Heater’s Life

Prevention is always better than repair. Here are some easy steps to keep your tankless water heater running smoothly for years:

• Schedule Regular Maintenance

Annual checkups by a professional can catch problems early. They’ll clean the system, check electrical parts, and test performance.

• Use a Water Softener if You Have Hard Water

Hard water causes mineral buildup that damages the heater. A water softener reduces scale and protects your unit.

• Keep the Area Around the Heater Clean and Dry

Dust and moisture can affect electrical components. Make sure the space is well-ventilated and free of clutter.

• Monitor Water Pressure

High water pressure can strain the heater. Use a pressure regulator if needed to keep it within safe limits.

• Flush the System Yourself Every 6-12 Months

If you’re comfortable, flushing the heater regularly helps prevent scale buildup and keeps it efficient.

When to Consider Replacing Your Tankless Water Heater

Sometimes repairs aren’t enough. If your heater is old, frequently breaking down, or not meeting your hot water needs, replacement might be the best option.

Look for these signs:

• Frequent repairs costing more than half the price of a new unit

• Inconsistent hot water despite repairs

• Outdated model with poor energy efficiency

• Visible corrosion or major leaks

  
  

Upgrading to a newer model can save money on energy bills and provide better performance. Plus, newer units often come with improved technology and longer warranties.

Tankless water heaters are a great investment, but they need care and attention. Whether you’re tackling minor repairs yourself or calling in the pros, staying on top of maintenance will keep your hot water flowing without interruption. Remember, if you ever need expert help with tankless water heater repair, Matthew & Sons Plumbing is ready to assist you with fast, friendly service in Lafayette, LA, and the surrounding areas. Don’t wait for a cold shower to act - keep your system in top shape today!