E4 Code on HD55

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What does the E4 code mean and how to repair it?


Hi Bill,

E4 is the water level alarm error. HD55 has no water pump, E4 appears and it is better for u to replace a motherboard.

Who do you contact to order a motherboard. 

Hi Bill,

You can directly purchase the motherboard through the following official website link:


For motherboard replacement, please refer to the following video:

If you still have any questions, please contact our US office
Email: 2support@alorair.com

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