Pitco frialator 35c+s pilot keeps going out

Is it doing more than lighting the pilot light? Or is the only action is the pilot light coming on, then off?

I would need to know more spacifically which model you had. Here is a list of manuals on the manufacturers web site so you can see for yourself.

http://www.pitco.com/doc_lib.htm

If I were to look at your unit, I would first look for, and see if there is a sensor (sometimes appears to resemble a piece of coat hanger sticking through some ceramic) that the flames will heat. The warming from the flames generates electricity. The electricity keeps the gas flowing. It is a safety device to keep your home/business from exploding from a build-up of unburnt gas.

Make sure the sensor is being hit by the flame. If it is, and the flame still goes out, then it just might be bad. I would imagine it would run about $20 for a replacement part.

if it works, great! If not, then you are only out $20.