@dlowan,
Put on Beths Metal Collinder Hat and approach cautiously! If no xrays are found to be frizzling the collinder and the beeping continues..... then make a call for the men in uniforms!
all the alarms I had at the old house were hooked up to the mains and had to have the batteries replaced.... every 2-3 years I believe.... hard to get hold of and a bugger to put in too with 15-18ft celings.
They definitely chirupped as we have lots of power cuts on the moors - I think the emergency batteries for the house alarm, fire/CO and emergency lighting only lasted a maximum of 8 hours without main power.
To be on the safe side I'd call a friend fire chap (know they are pretty bsuy right now) - but just a call to the local station - and one nice chappied may come round and give you advice. All our firefighters have teams who go rounds schools and houses etc to help peole with their alarms willingly - saves them a heap big job if they know they are working... as well as saving the residents and their lives. Would also consider the CO too.
Hope you get it fixed Deb. Not worth it not working right... as well as peeping driving you nuts.
x
ooooooooh.... Mysterman would know....