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Argo 6P Controller was making noise now one of the zones not working

I have a Argo 6P with 6 zones setup to it. Suddenly my controller was making a chattering noise and after I turned off and on the power to the boiler one of my zones (Zone 1) is not responding. What do you think it could be? A relay? see attached pictures below


  • STEVEusaPA
    STEVEusaPA Member Posts: 6,506
    No pics, but yes, probably need to replace associated cube relay.