If you face the problem with a blower in your furnace, don’t need to panic. It's a usual problem, and can be fixed by replacing the control board. The control board has relays that regulate the voltage to each component in the furnace. If the relay that controls the blower motor fails while it is closed, it will send continuous voltage to the blower motor, causing the motor to run continuously. If the control board is at fault, replace it. Control board is one of the easiest parts to replace. In our articles we have described how to replace the control board in the furnace Amana guca070ax30.
- Before you remove any access panels, be sure to shut off the power supply to the furnace to prevent shock.
- You may be able to simply rotate retaining knobs to release the panel, but you may need to fully unthread mounting screws securing the panel. The circuit board may be attached to mounting pins on a mounting plate or secured with one or more screws. You can often use needle-nose pliers to help release the board from the mounting pins. Be aware that you may need to detach the mounting plate in order to fully release the circuit board.
- We recommend transferring the wires from the old board directly to the new one to make sure you’re connecting them to the appropriate terminals. Keep in mind, you may need to remove some terminal covers from the new board before you can connect certain wire connecters.
- Be aware that thermostat wires may be secured to the old circuit board with screws. Unthread the screws to release the wires and then use the screws to secure the thermostat wires to the new board.
- With all of the wires connected, snap the board onto the mounting pins or secure it with the screw or screws. Reposition and secure the mounting plate if necessary.
- Replace the access panels as necessary and secure them with the screws or retaining knobs.
- Restore power to the furnace.
- Call for a higher temperature on your home’s thermostat and observe if the furnace now appears to be functioning normally.
Problem is solved. Now your furnace blower motor must work in normal mode. After some tests, you’ll see it. If the problem remains there could be a defective part that requires a replacement, and you may need to consult a professional.
