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Much appreciated reply and thanks for the explanation. I will do that ... move wires 1, 2 and 3 to the third module then reprogram for zones 4-9.

I have a 7 zone Rain Bird ESP-M controller in my sprinkler system setup that is approx. 15 years old. I've never had any problems with it electronically until recently (about 2 weeks ago). I notice that the valve on zone 1 was not opening when the controller activated that zone. I can...

I have a 7 station ESP-M controller that has 4 stations on the main module and 3 stations on an expansion module. All has been working correctly for the past few years until recently. The problem is with the last station #7 on the expansion module. The controller will advance to this station...