Navien Tankless Water Heater Mixing Valve Replacement (error code 045)
Our Navien NR-240 tankless water heater showed a 045 error code shortly before the mixing valve began to leak. In this video, we'll walk through removing and replacing this mixing valve with a new one. The new valve (part no. 30004837B) can be ordered through suppliesdepot.com and takes just a few minutes to install with only a screwdriver. There are some sharp edges in there so be careful!
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