Hi, I don't know if you can help me, I have looked through the threads and I cannot see my specific issue, When I set my alarm it emits an internal alarm noise but nothing from the external bell,I tested the external bell, and it works, the number 4 zone is lit up red when I input the code to set the alarm, the lights blink on the two ceiling sensors and the 4 sensors on the doors and windows visually appear OK, I last changed the battery in 2016, for some reason it blew a fuse ,but I replaced that, and it all appeared fine, I was wondering if there was a way to disable the number four zone so I can still use the alarm, I have a new Battery being delivered tomorrow just in case It's that, thanks for looking
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