Rinnai tankless water heaters are known for their efficient and reliable performance. However, like any complex appliance, they can occasionally encounter issues that require troubleshooting. One such issue is Error Code 61, indicating a combustion fan failure. If you come across this error code on your Rinnai tankless water heater, here are some steps you can take to diagnose and potentially resolve the problem.

Step 1: Ensure the Fan Turns Freely

The first thing to check when dealing with Error Code 61 is whether the combustion fan is turning freely. Over time, debris or obstructions may hinder the fan’s movement, leading to a malfunction. Follow these steps:

  • Inspecting the Fan Blades
  • Cleaning the Fan Blades
  • Replace fan if necessary

Step 2: Check the Wiring Harness

A faulty or loose connection in the wiring harness can also trigger Error Code 61. Inspect the wiring harness leading to the motor for any signs of damage, such as frayed wires or loose connections. Take the following actions:

  • Inspecting the Wiring Harness
  • Ensuring Secure Connections

Step 3: Measure the Motor Winding Resistance

To further diagnose the issue, you can measure the resistance of the motor winding. This step requires some basic electrical knowledge and the use of a multimeter. Follow these steps to measure the resistance:

  • Turn off the power supply to the water heater and ensure it is completely disconnected.
  • Locate the motor and identify the two motor winding terminals.
  • Set your multimeter to the resistance or ohms function.
  • Connect the multimeter leads to the two motor winding terminals.
  • Observe the multimeter reading. The exact resistance value will vary depending on the specific Rinnai model. Consult the manufacturer’s documentation or contact their customer support for the recommended resistance range.
  • If the measured resistance falls outside the acceptable range, it indicates a faulty motor that may need replacement.

While these troubleshooting steps can help diagnose Error Code 61, resolving the issue may require professional expertise. Rinnai tankless water heaters involve complex systems, and attempting repairs without proper knowledge can lead to further complications. If you’re unable to resolve Error Code 61 or have concerns about the troubleshooting steps, contact a certified Rinnai service technician. They have the necessary expertise and tools to accurately diagnose and fix the issue, ensuring safe and efficient operation of your water heater.

In conclusion, Error Code 61 on a Rinnai tankless water heater indicates a combustion fan failure. By checking the fan’s movement, inspecting the wiring harness, and measuring the motor winding resistance, you can gather valuable information about the cause of the error. However, it’s crucial to involve a professional technician for proper diagnosis and repair to ensure the longevity and performance of your Rinnai tankless water heater.