Several indicators suggest that it might be time to consider heat pump replacement. If your system is over 10-15 years old, requires frequent repairs, or has seen a significant decline in energy efficiency, replacement is worth considering. Uneven heating or cooling throughout your home, excessive noise, and skyrocketing energy bills are also red flags. Consulting a professional technician for a thorough evaluation can provide insight into whether replacement is a more cost-effective option compared to ongoing repairs and inefficiency.