For the last 3 years I have been trying to diagnose why my WaterFurnace decides to stop working correctly. Cold air stops blowing from vents and is replaced by slightly blowing and slightly cool air. Once I turn the thermostat to "off" and wait a few minutes and flip it back to "cool" everything returns to normal. The only unusual thing that my serviceman can tell me is that the temperature of the water in the lines going out is 115 degrees and when it returns it is 110 degrees. He says pressures are fine but the compressor gets too hot to touch. He has contacted Enertech, which is located here in my town, and they think it is the compressor. The system has worked perfectly for 3 days straight. Last month I was turning the thermostat off/on maybe 3-4 times a day. Last winter it worked fine. I think I only had to reset thermostat twice. Got any ideas?