3 Signs Your Tankless Water Heater Needs Repairs

Tankless water heaters are a fantastic way to ensure a constant stream of hot water is available for your bathroom or kitchen. Despite these appliances being extremely reliable, there will come a time when your tankless water heater needs some repairs. 

Read on for some warning signs to look out for to ensure you stay on top of your home maintenance chores and avoid that cold shower, inevitably on the coldest day of the year!

Reduced Water Flow

With water constantly flowing through the system, eventually, over time, it is possible that something will cause a blockage in the system. Most commonly, this occurs gradually over time as mineral deposits, sediment, or other debris accumulate in the pipes or even in the heater itself. 

When you notice a drop-off in the hot water flow, it is time to call in the professionals to inspect your system and identify and rectify the problem. All filters, valves, and pipes will be checked to ensure they are clean and clear.

Unfamiliar Noises

If there is a problem with your tankless water heater, it will often manifest as strange noises coming from the unit. When you turn on a hot water tap, there could be rattling, clanking, or banging sounds. It could be something that has come loose or, as above, a blockage in the system causing the commotion. 

Other weird noises to look out for are whistling or hissing sounds that indicate that there may be a problem with your gas supply. As this can be dangerous, it is best to get it checked out immediately. 

Error Codes 

Modern tankless water heaters with a built-in display will show error codes if the system is malfunctioning. You can check the meaning of the codes in your user manual to troubleshoot the issue. However, if the problem continues, worsens, or is beyond your abilities, then it is time to call in professional help to ensure that no further damage is caused to the system. 

Contact Natural Choice Heating & Cooling today for expert advice and service for all your tankless water heater repairs. Our highly trained team is standing by to assist when you notice these warning signs and help prevent you from having another cold shower! 


As an owner-operated local company that has been in business for over 19 years, we are proud to accept Homestars ‘Best of’ Award for our 12th consecutive year in a row. Here’s to a great year, and many more to come.