How to Maintain Your Tankless Water Heater for Optimal Performance
A tankless water heater, also known as an on-demand water heater, is a highly efficient way to get hot water only when you need it. Unlike traditional water heaters that store hot water in a tank, tankless systems heat water as it flows through the unit, ensuring you never run out of hot water. To keep your tankless water heater running at peak performance for years to come, regular maintenance is essential. Here’s how you can maintain your tankless water heater for optimal performance:
1. Regularly Clean the Air Filter
Tankless water heaters often have air filters that help maintain airflow and prevent dust and debris from clogging the system. Depending on your usage, cleaning the filter once every 6 to 12 months will help the heater operate efficiently. A clogged filter can reduce performance and cause overheating, so make sure to check it periodically.
Tip: Most air filters are easily accessible, and you can clean them with a soft brush or by rinsing them under warm water.
2. Descale the Heat Exchanger
Over time, minerals in your water supply—particularly calcium and magnesium—can build up inside the heat exchanger. This is especially common in areas with hard water. When these mineral deposits accumulate, they reduce the efficiency of your tankless water heater and can cause it to overheat or malfunction.
How to Descale:
– Step 1: Turn off the power and gas supply to the unit.
– Step 2: Attach a pump and vinegar solution to the heater’s descaling valves.
– Step 3: Run the descaling solution through the system for about 45 minutes to an hour.
– Step 4: Flush the system with clean water to remove any vinegar or mineral buildup.
For optimal performance, it’s recommended to descale your unit at least once a year, or more often if you live in an area with hard water.
3. Check the Water Pressure
Your tankless water heater is designed to work within a certain range of water pressure. Too high or too low water pressure can cause issues, including a failure to heat water properly, inconsistent water temperatures, or damage to the unit over time. Ensure the water pressure is set to the manufacturer’s recommended level—typically between 40 to 80 psi.
Tip: If you notice any changes in water pressure, it’s a good idea to contact a professional plumber to inspect the system.
4. Inspect the Venting System
Since tankless water heaters are powered by either gas or electricity, ensuring that the venting system is clear is crucial for safety and optimal performance. A blocked vent can lead to poor combustion, carbon monoxide buildup, or overheating.
How to Inspect the Vent:
– Look for signs of debris, soot, or rust.
– If your unit has a gas-powered vent, ensure there is no obstruction in the venting pipe.
– Check the exhaust system to make sure it is securely fastened and properly venting to the outside.
If you’re unsure how to inspect your venting system, it’s a good idea to call a professional HVAC technician to perform a safety check.
5. Monitor the Temperature Settings
Most tankless water heaters come with temperature control settings, and keeping your water heater at the optimal temperature is key to maintaining efficiency. For safety and energy efficiency, aim to set your water heater between 120°F to 125°F. This will prevent scalding while ensuring your heater isn’t working harder than it needs to.
Tip: If you haven’t already, consider using a timer or a smart home system to manage your water heater’s settings automatically based on your family’s usage patterns.
6. Inspect the Water Filter
Tankless water heaters typically have a water filter that helps protect the system from sediment and debris in the water supply. If your unit has one, be sure to inspect and clean or replace the filter regularly to avoid clogs and reduced water flow.
Tip: Depending on your water quality, clean or replace the filter every 6 to 12 months.
7. Schedule Professional Maintenance
While there’s a lot you can do yourself, it’s still important to have a professional HVAC or plumber inspect your tankless water heater every 1-2 years. A licensed technician will be able to check the internal components, clean the system more thoroughly, and spot any issues before they become major problems.
8. Monitor for Error Codes or Malfunctions
Modern tankless water heaters often come with error codes that alert you to specific issues, such as low water flow, overheating, or gas supply problems. If you notice your water heater flashing an error code, refer to your manufacturer’s manual to troubleshoot. Some issues may require a professional to resolve, so don’t hesitate to call a technician if you’re unsure.
9. Keep the Area Around the Heater Clean
A clean environment contributes to the longevity of your tankless water heater. Dust, dirt, and debris can cause unnecessary strain on your unit, so make sure to keep the area around the heater clean and clear of obstructions. This will also help with airflow and prevent overheating.
Conclusion
Maintaining your tankless water heater is simple but essential for long-term performance and efficiency. By following these steps—cleaning filters, descaling the system, checking water pressure, and scheduling professional maintenance—you can ensure your unit operates at its best, providing you with reliable hot water whenever you need it.
With regular care, your tankless water heater can provide many years of efficient, on-demand hot water. If you encounter any issues or need professional maintenance, don’t hesitate to contact a trusted HVAC technician to keep your system running smoothly.
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Are you due for a tankless water heater inspection or maintenance? Contact us today to schedule a service and keep your system running like new!