I want to increase the blower speed . The manual says it can be increased by 7.5 percent or 15 percent via dip switches 8 through 11 for the cooling speed ( which is what I want ) . The reason being my 2nd floor is too dam hot even with a new Lennox air conditioning unit purchased with my furnace .

Do do I need a Mano meter ? Or whatever it is called . I thing the furnace is preset and does anyone have a picture where I can find the proper DIP switches mentioned above ?

Thanks Robert

Should be on the diagram, typically inside the air handler. Your air handler fan has many wires and the motor, inside the fan housing may be difficult to get to. Be careful of going too high, you may not dehumidify as well and noise may become an issue.