Got an ET-73 temp monitor, and it works great, no problems.
But whenever I go to use it, I have to take the back off the transmitter and turn it on so it can sync with the receiver. Otherwise the receiver can't receive the signal.
Makes no difference if I leave the transmitter on or off. If it's left on between uses, I still have to take the back off, turn it off and on again.
Am I missing something here? I assume so, but I wonder why it's designed this way.