I arrived for a recurring problem. I spoke with the homeowner and the issues is that the system sounds like it winds up and down before the furnace comes on then it shuts off and will not come back on. I approached the system and found it to be running and operating with no fault codes or issues. I cycled the furnace off at the thermostat and back on from the thermostat. I inspected the system and found the capacitor driven motor to be running properly. I checked all drains in the 90% furnace. I found nothing to be stopped up or holding water. I pulled the induced draft motor and found no blockage in the motor or collection box. The system has a fresh air intake that is piped into the furnace from outdoors and it is clear with no debris in the furnace cabinet. I checked the flue and found it to be clear with no debris in the flue. I checked amps and all gas pressures. I both pressure switches in high heat and in low heat and found them to be operating properly. I cycle the system on an