The answer to 'HVAC repair making noise' is that there are several common causes for noises coming from your HVAC system, including loose parts, worn bearings, compressor issues, and ductwork problems. Symptoms may include rattling, banging, squealing, or grinding sounds. Solutions can range from tightening loose components to replacing worn parts, and in some cases may require calling a professional HVAC technician.
If the noise is coming from the outdoor unit, it could be an issue with the compressor or fan. Indoor noises may be due to a problem with the blower motor or ductwork. Unusual sounds should be addressed promptly to prevent further damage and ensure your HVAC system continues running efficiently.