The answer to 'furnace repair making noise' is that there are several common causes, including worn bearings, a problem with the blower motor, or loose components. Symptoms may include grinding, squealing, or rattling noises coming from the furnace. Solutions can range from simple DIY fixes to more complex repairs that require a professional HVAC technician.
If the noises are minor and intermittent, it may be something you can address yourself, like tightening loose screws or replacing a worn belt. However, if the noises are persistent, getting louder, or accompanied by other issues like reduced airflow or the furnace not turning on, it's best to call in a professional HVAC technician to diagnose and repair the problem.