Air Conditioning and Refrigeration Troubleshooting Handbook is a must-have text for contractors involved in the maintenance of AC systems. It includes operation, adjustment, troubleshooting, installation, use, and start-up procedures for different types of air conditioning units.
This handbook is very complete !!! It does has a lot of questions that you will find in the test. Totally recommendable!Robert
I had so much question about everything and thanks to Contractor Campus they answered all of them ! There service is amazing !
Jess Marie