Hi,
Live in a new build house 7yrs old, with 3 mains wired inter-connected smoke alarms, one per floor. Top one has started chirping about every 30 seconds. Continues to chirp when disconnected and battery taken out! Replacement date isn't for another year - has it just worn out early? Also it only seems to chirp in cold weather I.e. this time of year at night! Heating being on / hairdryer / vacuum treatment seems to fix it temporarily. It isn't battery as replacing this has no effect.
Manufactured by Garvan from Hong Kong, have bought a new FireX mains powered inter-connected one but unsure if it'll talk to the other two Garvan ones and also needs electrician to fit?
Have also seen the EasiChange scheme.
Interested in NEST but too expensive at moment.
What's the best way forward and what's causing the chirp please?
Thanks
