An inspection of the basement revealed there was no vent for the gas water heater, and the furnace vent had fallen apart in the crawl space. The inspector immediately alerted the tenant to the severity of the problem and notified Michigan Gas Company, so they could assist in testing for carbon monoxide. The gas company's analysis showed high levels of carbon monoxide present in all areas of the house, prompting them to shut off the gas at the meter. The Department of Environmental Health decided that, because it was the middle of February and the furnace was no longer in operation, the property was not fit for habitation. The house was immediately vacated.
Carbon monoxide is difficult for an untrained person to detect.
Therefore, all fuel burning equipment should be inspected by a qualified contractor. Preventative Maintenance Checklist for Furnaces Perform visual inspection for vent connector, gas line, dirt, debris, etc. Inspect heat exchanger for rust or cracks. Remove blower assembly. Inspect heat exchanger for rust or cracks.