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Original Poster: Stephen McGeough
Hi, I am sorry to hear your facing this behavior with your thermostat.
Just to confirm, did you check all breakers and switches at the location? Make sure to take out the USB cable if it is still connected and check all breakers. If it all looks good, turn the power off to the Heat Link for a few minutes, if you're comfortable in doing so, and after turn it back on. See if the Heat Link has any reaction after.