Can I Just Replace the Outdoor Unit on an Older Air Conditioning System to Save Money?
Air conditioning systems are very expensive to replace, and it’s tempting to try to save costs wherever possible. When one unit of your air conditioning system fails, replacing one unit while keeping the older, still-functioning unit sounds like a practical cost-saving measure. However, mismatched air conditioning components can have a negative effect on the efficiency, reliability and life-span of your system. The indoor and outdoor units of a residential air conditioning system function together despite the fact that they are split into two units. As a result, the system suffers stress when the two units have dissimilar components that were designed to work at different levels of efficiency. You Can’t Teach Old Coils New Tricks When mismatched air conditioning components are forced to work together, it can put stress on the older unit and seriously compromise the function of the new unit. Newer condenser coils are more efficient, have a larger, grooved surface area, and employ other enhanced features that improve their performance. Older coils do not have these features, and are often incompatible with new condenser coils. New air conditioning units use thermal expansion valves with a hard shut-off to control their use of refrigerant. However, older units were not