Hi, my name is ***** ***** I have been in the home improvement and repair field for 20 years. I will be glad to help you today. Were you replacing a water heater? If so what size gas line is connected? There may also not be enough water pressure to activate the flow sensor also. Do you have very low water pressure going through it?
Have you set all the dip switches to the correct settings?
I have not looked at the manual but there should be settings for fuel type and elevation.
Have you measured that the minimum water pressure is being reached?
How about the minimum water flow? Is that being reached? Is there any error code?
Is it artiston or ariston?
Do you have more information about the model? Is there a model number?
I cannot find anything about that model. Is it discontinued?
I am going to opt out since I do not have any information on that model.