I have two old 1839WN detectors - what can I get to replace them that will fit?

Asked by Meri-Jayne on 03/25/2014 1  Answer

ManualsOnline posted an answer 10 years, 8 months ago

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0 9120B is what First Alert told me is the replacement unit, but plug has changed, so get anything 120vac interconnected that you like.
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