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Starting Member


Sunday, May 16th 2010, 12:25pm

Can expansion modules go bad?

I purchased a home with a Hunter Pro-C controller which has never been wired up, dated 2005. I wired the controller and the first 3 zones work fine. Zones 4-6 do not work. If I switch the valve wires to zones 1-3 they work ok, indicating to me that the expansion module is not functioning. It also gets warm to the touch a few minutes after turning the controller on. Since this is the first time it has been used and is 5 years old, is it possible the expansion module is defective? It is the grey version. Will the new black version work ok with this controller? Is there anything else I can do before ordering a replacement. Thanks


Supreme Member

Posts: 5,218

Location: Metro NYC


Sunday, May 16th 2010, 4:13pm

anything can go bad. Try a controller reboot. And yes, the newer expansion modules fit in the older Pro-C

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