Short Cycling

Update: I attached some gauges and found the system was over charged. The tech at Vintage Air sent me a document showing the correct hi and lo pressures. I brought the pressure down to be within those ranges and the thermometer in the cabin vent went up. The VA tech said to bring the low side pressure down a bit more to see if that helps. If not, he said to clamp the water hoses going to the firewall to see if that helps. If it does he will work with me to determine why the heater control is allowing hot water to enter the cabin when the control is set to full cold.

Wondering now how to clamp those hoses without damaging them.