I guess your interview went well? were you completely honest with your new boss and say you had no experience in refrigeration? If so, then he should be sending you out with other tradsmen to basically "show you the ropes". This will be a period of fast learning for you but not something that is impossible to grasp. Ask lots of questions and take notes.. On this forum, there is so much information available to learn from.. Just take your time and ask any of us if you don't understand something or need clarification.. Mike.