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Lochinvar Noble "COMBI SENSOR FAULT"
I have a Lochinvar Noble combi boiler installed about 5 years ago by a professional who has since passed away.
The unit displays COMBI SENSOR FAULT.
On the main interior manifold I see the following sensors: Outlet, Out Temp, Flow, In Temp.
I see from the service manual that the Combi Sensor is connected to CN4-5 and CN4-6, and I think (not sure) that those go to the Out Temp sensor.
But, disconnecting each sensor one by one results in the display showing a different error message, like, "OUTLET SENSOR FAULT" or the in and out temps disappearing.
And, when DHW is running, the little light on the Flow sensor lights up.
I removed the flow switch and cleaned the filter, but that didn't help.
Also, I don't know the password. Not sure if that is relevant. Maybe need to manually reset the COMBI SENSOR FAULT error?
Can anyone steer me on this?
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