Hi guys
I need a technical wizard to help me out. I have an ATC-300 thermostat and the temp alarm no longer beeps when the temp is out of the set range? I'm pretty sure I didnt accidently turn it off as I havent been meddling with it? It still turns the heaters on and off when necessary. Is there some way to turn it on and off? Or a way to check if its broken? Its still pretty new so I really dont want to have to replace it.
Thanks