When it comes to connecting a condenser and an air handler, it's essential to remember that the air handler can be bigger than the condenser, but never the other way around. To answer your question, yes, a compatible condenser and air handler will work if installed correctly. The size of the condenser you need depends on the size of your home. Generally, a 2.5-ton condenser is enough for a house of less than 1200 square meters.
If you have a larger home and you're not getting the cooling you need, then you may need to upgrade to a larger condenser, such as a 4-ton unit. This should be accompanied by a new evaporator coil. Before replacing any components, it's important to analyze the entire system to determine what caused the failure. Replacing just the condenser or compressor without looking at other parts of the system could be a costly mistake. When selecting an air conditioner for your home, it's important to consider the size of your home and the type of cooling you need. If you have a large home or need more cooling power, then you may need to upgrade to a larger condenser.
However, if you have a smaller home or don't need as much cooling power, then you may be able to get away with using a smaller condenser. It's also important to consider the type of evaporator coil that will be used with your new condenser. The evaporator coil should be matched to the size of the condenser in order to ensure optimal performance. In conclusion, yes, you can use a 3-ton condenser with a 2.5-ton air handler as long as they are compatible and installed correctly. However, it's important to consider the size of your home and the type of cooling you need before making any decisions about upgrading your system.