Wow i can't believe they are charging $75 for the upgrade chip. This part unprogramed costs $2.
The door bell/temp sensor confusion isn't strange. Temp sensors can connect to a zone like a door door bell button can. It was probably one initially then changed with the labeling not updated.
The door bell/temp sensor confusion isn't strange. Temp sensors can connect to a zone like a door door bell button can. It was probably one initially then changed with the labeling not updated.