Bought two. One works, the other doesn't. The non-working one does not respond to temperature sensors - neither to the built-in one, nor to the wired one. When switching sensors in advanced settings, it throws out the error "ERR1" (or something like that, I don't remember exactly). I thought that the problem was in the wiring and connection, I connected a second device instead of a non-working device - everything is fine, it turns on and heats up. They need to be sold in buckets, by weight: he took a bucket of thermostats, took away half a bucket of working ones, and returned the other half a bucket of non-working rubbish to the store or threw it away. That's just they are not very humane for this option.
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