since yesterday Zwave module nonoperational.
restarting, disabling, enabling , zwave doesn’t respond.
hard to believe, but looks like hardware failure. Any ideas?
Contact ST support at https://support.smartthings.com
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What device/make? My neo coolcam 2ch switch went down a few days ago ( just 1 of 2). Works manually but nothing in the app
He was referring to the z-wave module in the ST hub 
HUB back on for few seconds/minutes after I disable and enable and than fails again
Contact support.