- This question can cover signs such as unusual noises, insufficient cooling, or higher energy bills. 4. **How can I improve the energy efficiency of my air conditioning system, and what are potential upgrades or improvements I should consider?

- This question can cover signs such as unusual noises, insufficient cooling, or higher energy bills. 4. **How can I improve the energy efficiency of my air conditioning system, and what are potential upgrades or improvements I should consider?
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