The heat pump in our home is not working properly. We have a relatively up-to-date Lennox condenser unit and a 40 year old GE blower unit. The system is fully charged with freon. When we first turn it on it works fine, but after maybe 1/2 an hour it no longer cools. Also there is no condensation coming from the unit, whereas it normally kicks out about 1/2 a gallon of water on a hot day.
1. What is likely the problem?
2. How do I proceed?