Determining whether the rattly sound is coming from the AC compressor or the blower in your car can be a bit tricky, but there are some steps you can take to narrow down the source of the noise:
Start the car and listen: Turn on your car's engine without engaging the AC system. Listen for any unusual rattling or clicking noises. If you hear the rattling sound even when the AC is off, it's likely not the AC compressor causing the problem. In this case, it could be an issue with the blower motor, a loose component, or some other part of the HVAC system.
Turn on the AC system: After confirming that the rattling sound is not present when the AC is off, turn on the AC system while the car is still running. If the rattling noise becomes more pronounced or changes with the AC's fan speed, there's a higher likelihood that the problem lies with the AC compressor or related components.
Seek professional inspection: If you're unable to determine the source of the rattling sound or if you suspect it is related to the AC system, it's best to have a qualified mechanic inspect the car. They can pinpoint the issue accurately and advise you on the necessary repairs.
Regarding driving the car without using the AC, in most cases, it should be safe to do so. If the noise is coming from the AC system, not using the AC should not cause any immediate harm to the vehicle. The AC compressor will not be activated, and the AC system will remain idle while the car is running. However, if the noise is indicative of a more significant problem that affects the overall operation of the vehicle, it's essential to get it checked by a mechanic before continuing to drive to avoid potential complications or further damage.
Always prioritize your safety and the health of your vehicle, so if you notice any unusual noises or issues, it's best to have them inspected and repaired by a professional as soon as possible.