CO alarm, is it faulty?

j2011

Came home to the sound of my CO alarm beeping so I turned off my heating and moved the alarm outside to shut it up.

The thing is, it didn't shut up. It kept beeping.

So I removed the battery for a while then replaced it, it still beeped, so I got a new battery and it still beeps.

So outside in the snow is my CO alarm beeping away.

Till I took the battery out again.

So is there a deadly amount of CO in the atmosphere? Most unlikely.

Then I remembered that my 2 smoke alarms are also CO alarms, they were bought to replace previous smoke alarms after I had bought the CO alarm and were in a sale and cheaper than smoke only alarms.

I checked the combined CO/smoke alarms and they are OK so as I was getting cold I turned on my heating and they are not sounding an alarm.

So put another battery in the CO only alarm and off it goes beeping again.

So 3 CO alarms and one beeps even after changing the battery, must be faulty?

Is there any way I can find out for sure or just bin it and buy another?

It is only 18 months old.

muckybutt

you can buy canned co to test the others but I think the one that is going off continuously sounds like its burgered !
http://www.safelincs.co.uk/Detectagas-CO-Detector-tester/ £13.99 a can...other companies are available