Carbon Monoxide Alarm at 4477 Holly Trail Road

Summary: A carbon monoxide alarm was reported at a one-story house located at 4477 Holly Trail Road in Montgomery County, Texas. Engine 189 was dispatched to respond to the alarm. The alarm company reported a signal from Zone 5 with no additional property description. There were no vehicles seen outside the residence, and attempts to contact the homeowner by phone were unsuccessful. Later, the homeowner made contact and advised that the garage door had been opened for the fire crew.