This undated combo image made from images provided by the U.S. Consumer Product Safety Commission shows an ESL and Interlogix smoke detector 400 series, left, and an ESL and Interlogix smoke detector ... more 
This undated combo image made from images provided by the U.S. Consumer Product Safety Commission shows an ESL and Interlogix smoke detector 400 series, left, and an ESL and Interlogix smoke detector 500 series. Radio frequency interference can cause the smoke detectors to fail to alert consumers of a fire. (AP Photo/U.S. Consumer Product Safety Commission) less 
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Associated Press | Photo By U.S. Consumer Product Safety Commission
Fri, Aug 15, 2014 2:15 PM EDT