This 11 year old Westinghouse central heat pump system keeps leaking water and freon due to all the rust on the evaporator coil. This is a very common problem with builder's grade HVAC equipment. The live expectancy of a system like this is 10 years. At some point replacement will be the only option to remedy this customers heating and air conditioning problems. Quality of install is very important when choosing a company to take care of your air conditioning and heating issues. Family