In air conditioners, it’s terrible if evaporator coils are larger or smaller than your condenser coils.
If the size of these coils don’t match, it can result in higher energy costs, reduced lifespan for your equipment, decreased comfort and dreaded warranty violations.
Evaporator coils are installed inside your indoor air conditioner. Condenser coils are in your outdoor unit. Manufacturers purposely designed both sets of coils to work together to reduce heat and moisture from your home. In a good air conditioner, both sets of coils are designed to match in capacity. In other words, the evaporator is sized perfectly to absorb only as much heat as the condenser coils can dump into the outdoor air, during one cooling cycle. Some complications can pop up when these coils don’t match in size. When your evaporator and condenser coils are mismatched, size-wise, the smaller size coils will not be able to keep up with the capacity of the larger size coils which forces the entire plan to run longer. The longer your equipment runs, the more energy it uses. When air conditioner coils are not matched, the efficiency and lifespan of these systems are significantly compromised. This puts extra stress on your air conditioner. For example, if one set of coils is continually finally working harder to keep up with the other, it will eventually lead to extensive repairs – and possibly early failure. Incompatible sizes can also lead to higher temperatures and humidity levels in your home. If your evaporator coil is smaller than the condenser coils, it might give better dehumidification, but it cannot cool the home as well. On the other hand, if your evaporator coils are larger than the condenser coils, the home will cool well, but little to no moisture will be removed from the air. Most manufacturers specify that if you substitute parts, or they will void the warranty. Manufacturers certainly designed both coils to work together; if one is substituted with a different size, manufacturers fear repairs and possible plan failures are inevitable.