Ruud Error Code 33: Fan Motor Fault

Error code 33 on your Ruud furnace indicates a 'Fan Motor Fault'. This means the furnace's control board isn't receiving the expected feedback from the blower motor. The blower motor is responsible for circulating heated air throughout your home. When this motor malfunctions or the control board loses communication with it, the furnace will typically shut down as a safety measure. This prevents the furnace from overheating and potentially causing damage to other components. It's important to address this issue promptly to restore heating to your home and prevent further complications with your furnace system. There are several reasons why this fault might occur, ranging from a simple wiring issue to a complete motor failure. The control board is constantly monitoring the motor's speed and electrical current. If either of these fall outside of the expected range, or if the board detects no signal at all, it will trigger the error code 33 and shut down the furnace. A faulty control board itself could also cause this error, although that is less common than motor or wiring problems.