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• BRK Electronics Smoke Alarm 4120B
  Posted by bhagen616 on Mar 8th, 2009 at 1:44pm
  
  
  smoke alarm manual
  
• BRK Electronics Smoke Alarm 4120B
  Posted by 5nitramdw on Sep 16th, 2008 at 11:42am
  
  
  Please help find the manual for this BRK Electronics Smoke Detector
  
• BRK Electronics Smoke Alarm 4120B
  Posted by isabella.nyc1 on Aug 15th, 2008 at 6:33am
  
  
  Troubleshooting
  Alarms going off for no reason in the middle of the night.

Can You Help With These Problems?

• BRK Electronics Smoke Alarm 4120B
  Posted by janjan22 on May 30th, 2009 at 12:30am
  
  
  brk smoke alarm 4120b
  all the alarms going off at once with no smoke
• BRK Electronics Smoke Alarm 4120B
  Posted by jveigl on May 26th, 2009 at 6:49pm
  
  
  Alarm going off for no reason
  The alarm went off several times in the night with no apparent smoke or fire. What could be causing this and what do you suggest that we do
• BRK Electronics Smoke Alarm 4120B
  Posted by trudi77 on Mar 29th, 2009 at 12:50am
  
  
  constant alarm sound!
  one nite the 6 smoke alarms in the house went off with a loud alarm sound, scared my 89 year mother so much!
  I had to disconnect them all and have tried connecting them again but they continue to make the loud alarm sound. what do I need to do? please help
• BRK Electronics Smoke Alarm 4120B
  Posted by linmccue on Mar 22nd, 2009 at 5:27pm
  
  
  battery
  cant get the battery holder open
• BRK Electronics Smoke Alarm 4120B
  Posted by runsalot88 on Mar 22nd, 2009 at 2:58pm
  
  
  Chirping won't stop
  My house has several BRK 4120B. After a couple of years they one by one started chirpping. New batteries don't help. They still chirp! How do I fix.
• 

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