Customer called saying Navien was giving an intermittent error code E003. We did some test and replaced the igniter and transformer.

Also we did a yearly maintenance which we flush heater, test for gas pressure and adjust offset pressure.


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- UEi Test Instruments EM201B Test Dual Input Differential Manometer
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- Rectorseal 68711 Calci-Free Tankless Water Heater Flush Kit
https://amzn.to/3P6Gt0v




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