Interconnected alarms at the end of their ten-year life fail as a set because they were installed as a set. Check the manufacture date printed on the back of one. Replacing all of them at once is the correct move.

This is most common in homes built roughly 1980 to 2000. The polybutylene and aluminum-wiring window, 150 amp panels, R-22 systems and first-cycle architectural shingle.

You can handle this one yourself. No call needed.

Related

• Federal Pacific or Zinsco panel
• Two-prong outlets throughout the house
• Cloth-covered cable visible in the attic or basement
• Fuse panel, or a 60 amp service
• Fuse larger than the wire it protects
• Ceiling fan mounted to a standard light box
• Knob-and-tube still energised
• No GFCI protection anywhere in the house

Back to Electrical.

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Written by Jaylan Jones. I Like To Fix earns a referral fee when a call connects to a contractor. See our business-model disclosure.