This is a little off-topic, but hopefully someone will be able to point me in the right direction. I recently purchased a small walk-in cooler for storage of fruits and vegetables I'm selling at some local farmers' markets. The cooler is running a little cooler than I need for storage of the vegetables. It seems to be cutting out at about 32 and cutting in at around 40. I'd like to run it at about 38 - 45. My problem is that the control is actuated by pressure rather than temperature. Is there a way I can translate the pressure settings to a temperature, or should I call a refrigeration mechanic?