Nighthawk Carbon Monoxide Detector

Nighthawk carbon monoxide detector saves life!



When I plug my Nighthawk carbon monoxide detector in, it says "Err" on the display.
Can you tell me what this means. it also beeps about every 5-10 seconds.
I have another CO detector plugged in, and there is no CO in the house.

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Vote:
5:1355086331:2
comment:

spark
spark:
13.12.12 3:23
Blow-dry the sensor with compressed air
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