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2. Do not use your telephone or appliances. Do not turn any light switches off or on. Any spark or flame could ignite the gas. 3. Call 911 and your gas company from a phone that is away from your home. 4. Do not reenter the area until the source of the leak is found and corrected. If the unit alarms and you are not testing the unit, it is warning you of a potentially dangerous situation which requires your immediate attention. NEVER ignore any alarm. Ignoring the alarm may result in injury or de