The answer to 'how often to replace evaporator coil' is that the evaporator coil in an HVAC system typically needs to be replaced every 10-15 years, depending on usage and maintenance. The evaporator coil is a critical component that helps transfer heat from the indoor air to the refrigerant, allowing the HVAC system to cool your home. Over time, the coil can become corroded, develop leaks, or become clogged with dust and debris, reducing its efficiency.
Regular maintenance, such as annual professional cleaning and inspections, can help extend the lifespan of the evaporator coil. However, even with proper care, the coil will eventually need to be replaced to ensure your HVAC system continues to operate effectively and efficiently.