![]() The Rinnai error code 02 cannot be fixed by the user, and the only solution is to make a service call and have a certified technician inspect your Rinnai. Rinnai error code 02 indicates that the burner will not operate while the freeze protection mode is active. Error Code 02: No burner operation during freeze protection mode However, eventually, the water heater will stop working to prevent damage. Pushing the temperature controller’s ON/OFF button five times will allow you to run the water heater even if you haven’t cleaned the heat exchanger. Make sure to treat hard water to prevent scale build-ups in the future. You can find detailed information on cleaning and flushing the heat exchanger in your owner’s manual. It can be observed alternating between the current temperature setting and the LC error code, accompanied by a beeping sound. ![]() Rinnai error code 00 will usually be replaced by LC code, followed by a number between 0 to 9 in the maintenance code history. If this does not work, you may need to replace the heat exchanger. To fix this error code, you need to flush the heat exchanger. Rinnai error code 00 (or LC0, LC1, LC2, LC3, LC4, LC5, LC6, LC7, LC8, and LC9) indicates there has been scale build-up in the heat exchanger. ![]() Share this post: Error Code 00 (or LC0 through LC9): Scale Build-up in Heat Exchanger ![]()
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