- Unusual buzzing, rattling, or vibration.
- Cooling that becomes inconsistent from day to day.
- A sudden increase in electricity usage without obvious reason.
- The system starts and stops too frequently.
- A persistent damp or burnt smell.
These warning signs do not always mean major damage, but they usually indicate the system is no longer running in a healthy condition. Timely inspection often helps prevent a more disruptive breakdown later.
