Arrived on site per customer request to inspect their home and furnace for signs of carbon monoxide leaks. Customer stated that their carbon monoxide detector went off at one point. Customer had the Fire Dept out to inspect, and was recommended they have the furnace system inspected. Presented pricing for furnace service Which was accepted by the customer. Customer has a Coleman 95% 60k nat gas furnace located in their crawlspace. Gave the unit a call for heat from the thermostat, unit kicked right on. Started by checking for traces of carbon monoxide inside the home and at the furnace. No traces of carbon monoxide was detected anywhere in the home or at the furnace. Returned to the furnace to run additional tests. Was unable to test inlet gas pressure on the furnace, as the inlet port screw on the gas valve had been stripped. Inducer motor was pulling 1.19A, and the blower was pulling 2.40A. The flame sensor was reading 6.7 micro amps. Tested for traces of gas from gas piping and