Rinnai Error Code 65

Beginner Info

Rinnai Error Code 65
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In this post, I’ll walk you through Rinnai Error Code 65 in order to help you in the best possible way that I can.

Moreover, I’ll also be discussing various aspects of Rinnai Error Code 65 so that you can make an informed decision.

Rinnai Error Code 65 is easy to handle and troubleshoot and you can expedite the fixing process on your own without a need for a certified technician.

We’ve been recommending the troubleshooting steps that we’re going to mention in a while to our clientele, and the feedback that we’ve received is positive and promising.

All you need to do is thoroughly go through this post and execute the steps that we’ve mentioned below.

So, without any further ado, let’s begin…

Rinnai Error Code 65 is displayed as a result of a water flow control fault.

In fact, the occurrence of this error code is related to the failure of the proper closing of the water flow control valve during the bath fill function.

The best thing that you can do post seeing this error code is you can immediately turn off the water and discontinue the bath fill function.


The Rinnai Error Code 65 is related to Water Flow Servo and can create havoc if not dealt with at the correct time.

In order to prevent any last-minute debacle, you need to consider fixing this error on a priority basis.

Once the code starts displaying on your tankless unit, the first thing that you need to do is to expedite the code reset process by performing a hard reset.

A hard reset can be done by first shutting your tankless unit and then starting it on.

Even after resetting, if the Rinnai error code 65 appears, it simply means that the water flow servo valve didn’t close during the bath fill function.

In order to prevent any further damage, the first thing that you need to do is to shut off the water flow.

Then, call a professional to troubleshoot the problem for you.

It’s A Wrap

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