Navien noise

[Arco]

I have ch210 combi when unit calls for hot water the first 10 to 15 seconds it makes a screetching sound. Any ideas?

 

[Topaazy]

Hey Arco.
It's something like that:

If yes,notes me.I will find solution for you!Cheer
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My website:.Bitcohen.Still in beta.

 

[Sponsor]

 

[Arco]

that is the noise, it started when the 3 way valve and the mother board were changed. Navien says its the gas pressure? What do you think

 

[Ladiesman217]

that is the noise, it started when the 3 way valve and the mother board were changed. Navien says its the gas pressure? What do you think

I am not sure if this is of any help, but I had the same noise in my tankless heater. Different brand and vintage. I did a flush and the noise was still there. The cure was to lubricate the water valve per the maintenance instructions. That noise is called water flow noise.

https://www.bosch-climate.us/files/201109161902310.TWH-V-11_125-80_Flush_and_pack_water_valve.pdf

If your 3 way valve is water flow related, that probably is the problem. If the noise only happened after your heater repair, obviously the new part is the cause of the problem.

 

[Kal]

Hey Arco.
It's something like that:

If yes,notes me.I will find solution for you!Cheer
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
My website:.Bitcohen.Still in beta.

Yep I have that exact noise. Please let me know what it is and how to resolve it.

 

[JOE.G]

Hi Mine will make a similar sound but only for a few seconds every once in a while, What and how should I try to lube it?

 

[Carl Parsons]

Yep I have that exact noise. Please let me know what it is and how to resolve it.

Did you find a solution?