An error code 74 indicates a BLE (Bluetooth) communication issue. This error code only appears in the error history when communication with the BLE module is not possible. Since there’s a communication problem between the unit and the BLE circuit board, please ensure that the BLE circuit board and its…
An error code 29 indicates a problem draining the condensate1 from the unit. This code only applies to our high efficiency condensing models. Just like if you leave a cold can of soda out in a warm area and condensate forms on the outside, a condensing unit creates condensate when cold water passes through…
Maximize your ease of installation with the new Noritz No Roof Kit. Our newest accessory is designed to make your tankless installation faster and easier than ever, without having to make the climb to your roof. Simply install using your existing 3” or 4” B-vent and your tankless is ready…
An error code 94 means the exhaust temperature is too high (condensing units). One of the benefits of installing a high efficiency tankless is the low exhaust temperatures that allow for the use of PVC, CPVC or PP venting (check local code to see if there are any additional restrictions)….
The Error Code 90 indicates an airflow or combustion abnormality. (Error Code 10 is also troubleshot with the same methods) To simplify it, the unit is either struggling to move air in or out of the unit or it is unable to hit the set temperature. For a newly installed…
The 73 error code indicates a circuit board setting issue. It is triggered by the following conditions: Any changes made to jumper wires inside the unit should be done with the unit disconnected from power. If you received a replacement circuit board please follow the directions included in the box…
The error code 71 indicates a malfunction in the circuit board, specifically in the Gas Valve drive circuit or its grounding system. This issue may be caused by a faulty soldering connection on the Circuit Board. In most cases, when this error occurs, the recommended action is to replace the…
The error code 20 means the High Limit Switch has been triggered. This error code generally requires a hard reset (unplugging or disconnecting power). The high limit switch is usually found on the copper pipe leaving the heat exchanger in a Pre-Mix style unit. The purpose of the high limit…
The 16 error code occurs when the outlet water temperature spikes to an abnormally high value. The heater will restrict its water flow as an additional precaution. The error code is reset by unplugging the heater, waiting 20 seconds, and plugging it back in. Common causes for the 16 error code…