How to Fix Navien E438 Error Code
1:20
How to Fix Navien E438 Error Code
982 views8 months ago
YouTubeFixed Formulas
In order to fix a Navien tankless water heater error code E438, you can try the following: Check the circulation pump: Make sure the pump is not damaged and is functioning properly. Check the flow sensor: Clean the sensor if there is any scale or debris buildup. Check the water supply and return lines: Make sure they are open and clear of any obstructions. Check the 2-way valve: Make sure it is positioned correctly to allow proper water flow. Descale the unit: You may be able to descale the unit
1:09
In order to fix a Navien tankless water heater error code E438, you can try the following: Check the circulation pump: Make sure the pump is not damaged and is functioning properly. Check the flow sensor: Clean the sensor if there is any scale or debris buildup. Check the water supply and return lines: Make sure they are open and clear of any obstructions. Check the 2-way valve: Make sure it is positioned correctly to allow proper water flow. Descale the unit: You may be able to descale the unit
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Find in video from 00:46Causes of E438
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