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Reported risk: The ESL 500N smoke detectors are hard-wired and require professional installation. The recalled alarms have the following model numbers, which are located on the back of the detectors: 521NB, 521NCSXT, 541NB, 541NCSXT, 541NCXTE, 521NBXT, 521NCSRXT, 541NBXT, 541NCSRH, 541NCSXTE, 521NCRXT, 541NCRXT, and 541NCSRXT. Also on the back of the alarms are the letters, "ESL," and the manufacturing date code of "0223" through "0323" (23rd week of 2002 through 23rd week of 2003). Units that may not work properly can be identified by the lack of the flashing red indicator light, though all units with the aforementioned model and dates codes should be replaced. Hazards: These smoke detectors may fail to work properly upon installation or if there is an extended loss of power. If the smoke alarms fail to detect fire or smoke, it poses a serious hazard to occupants inside of the dwelling.
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ProductGuru indexes recall and safety-alert records from ~30 public agency registries. We are not lawyers, regulators or product-safety consultants. This page restates what the named agency published; consult the primary source above (or qualified counsel in your jurisdiction) before any commercial, medical or safety decision.