DIY Maintenance for Tankless Water Heaters

Aug 18, 2024

Tankless Hot Water Heater Maintenance

Introduction

  • Tankless hot water heaters save money and provide an endless supply of hot water.
  • Common misconception: no maintenance is needed.
  • Importance of annual maintenance to prevent system failure and maintain efficiency.
  • Professional cleaning can cost up to $300 annually.
  • DIY cleaning method is inexpensive and straightforward.

Required Materials

  • 3 gallons of regular household vinegar
  • 2 washing machine hoses
  • Submersible pump
  • 5-gallon bucket
  • Complete parts list available in the description

Cleaning Process

Preparation

  1. Turn Off Unit
    • Press the on/off button on the heater.
    • Turn off the gas valve near the unit.
  2. Place Bucket
    • Position a 5-gallon bucket under the heater for water spillage.

Draining the Heater

  1. Close Valves
    • Identify and close red and blue water valves to stop water flow in and out.
  2. Remove Protective Caps
    • Open the flushing valves, starting with the blue, then the red.
    • Water will drain from the heater.

Cleaning the Pre-Filter

  1. Access Filter
    • Located outside the heater with a black plastic cap.
    • Remove cap (use channel locks if stuck).
  2. Clean Filter
    • Remove buildup using a toothbrush or rinse in water.
  3. Reinsert Filter
    • Hand-tighten back into position.

Flushing the System

  1. Connect Hoses
    • Attach washing machine hoses to the corresponding flush valve ports.
  2. Set Up Pump
    • Connect the blue hose to the submersible pump.
    • Place the red hose in the bucket as a return line.
  3. Add Vinegar
    • Pour all vinegar into the bucket.
  4. Run Pump
    • Plug in the pump; vinegar circulates through the heater.
    • Run for 45 minutes to 1 hour.

Final Steps

  1. Turn Off Pump
    • Unplug pump after cleaning.
  2. Close Valves and Remove Hoses
    • Close red and blue valves.
    • Remove and tighten protective caps.
  3. Optional Filter Check
    • Re-check pre-filter for debris.
  4. Flush System and Restore Unit
    • Turn on a faucet and return valves to original position to flush out vinegar.
    • Reopen gas valve and power on the system.
    • Check for air in pipes (normal and temporary).

Conclusion

  • Regular maintenance ensures efficient performance.
  • DIY method is cost-effective and easy.
  • Encouragement to maintain own system and subscribe for more content.