Was called out to the home due to the furnace intermittently not taking back on when the thermostat is calling for heat. Customer also also noticed that the air coming out of the vents is not as strong sometimes. The only code that I saw on the board was for the pressure switch not closing while the inducer motor is running. I cleared pressure switch tube and the pressure switch resistor. Furnace turned on and off just fine while I was here. Customer had already changed out the batteries in the thermostat since they were getting low. Customer stated that furnace was working properly since then. I fixed the blower speeds for furnace and blower only. Blower only had the highest speed wire while the furnace had a slower, blower speed than what the manufacturer has on their wiring diagram. I changed blower speeds around so that furnace is running with the blower speed designed by the manufacturer and the blower only setting is using a slower blower speed. The black wire which is the highes