Wildnose

Thank you so much. Now i know what the problem is. Cause the thing almost catched fire because of this😨 As i said, the previous owner had no idea what he was doing, and neither do i since i have no wiring diagram.

The heater is the only one connected to the COM port, the rest are all inserted into the ON port. As you can se the previous owner spliced two different color cables. The red one is from the heater.

That is actually great news. Could you be so kind as to share a photo of the motherboard? The last owner had tried to retrofit the new lx heater and failed. Now i do not know what is correct and what is wrong. I can not find the manual/wiring diagram for this system anywhere. It has a whiter sticker with the letters KL8-2-WB111.

Hi, sorry for asking on such an old thread but as a newbie amc-2210 owner. How did you connect the new heater? There is a wire to the flow pressure switch that is not needed on the newer Lx heater. Do you loop the wires and fool the system that way, or do i have to use an lx heater with external cable for the flow pressure switch managment? The way it is setup now the heater starts when you put the power on even when there is no water.