Carrier Furnace Blower Speed Adjustment

There should be low voltage speed taps on the main board for speed adjustments in cooling and heating.

Carrier furnace blower speed adjustment.

In many cases our carrier high efficiency furnaces also include technology that can produce enhanced comfort benefits and quieter operation as well. Usually there will be three speeds ranging from 40 to 100 of airflow. That should bump the fan speed up one level doing so each time will increase one speed until it cycles back to low. Step 1 turn off the power source that is connected to the furnace blower.

Step 2 carefully disconnect the wires from the coolant terminal which is located on the back of the unit. The wires are several different colors. Every furnace must have an adjustable blower. It will not change heating or cooling fan speeds.

Your furnace shows that you have an ecm motor which is an electronically controlled motor. With no call for heat or cool turn your circulation fan to on. Thermostat fan control on old furnace without circuit board. Blower fan speed adjustment options fan speeds provided inside the air handler unit may be set or adjusted by the remote control for a wall mounted split system air conditioner or heat pump changing the fan wire connection between the fan on relay and the fan motor selecting a high medium or low speed right on the fan motor itself.

Current high efficiency furnaces can be rated up to 98 5 afue which can reduce utility costs over the life of the furnace. Your furnace elements have a certain wattage. Then switch the jumper to your desired speed. Adjusting the fan speed for the furnace is not something to do just because you want it quieter or to save electricity.

Turn it off again for 1 3 seconds and back on. Your installer should know how to change speeds if he set the furnace up properly. On most control boards there will be a jumper that is marked to show that it controls the speed. Low speed furnace fan blower motor will not shut off.

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