This book must be a mandatory read for new techs and apprentices. The seasoned tech must know most of the material in it, but would get good use out of it as a reference book, also helpful to explain equipment to younger tradesmen. - Dave B
Doolin's Troubleshooter's Bible
Doolin's Trouble Shooters Bible. Air conditioning, refrigeration, heating, excitement pumps. Should be inflicted with troubleshooting resource
