E. Charging & Diagnostics Air and Refrigeration, two Wednesday evenings, November 05,2025---November 19,2025

NATE RECERTIFICATION

Two Evenings, Starts Tuesday, December 12,2023, ends December 19,2023

Classes start at 5:45pm and End at 9:00pm

6 hour seminar for HVACR Service Technicians & Installers with from one year to several years of experience. The information covered in this seminar pertains to the operation and service of residential and light commercial split systems and rooftop units. - Understand the Mechanical Refrigeration Cycle; Superheat; Sub-cooling; Normal Operating Conditions; How Operation is affected by System Problems. Proper Refrigerant Charging – Learn When to Not Add Refrigerant or When to Stop. Receive Charging Calculators for both fixed orifice and TXV systems. Recognize Low Airflow thru the evaporator. Recognize a Refrigerant Side Restriction. Recording System Vital Signs; System Vital Sign Parameters; Identifying and Correcting System Problems. Preventing noise complaints. Preventing compressor failures. A good opportunity for Service Technicians to prepare for NATE tests.

Note: Class will include one hour instruction on the new A2L refrigerants.

Tuition: $250.00

Payment must be received in advance of class. No payments can be made upon class arrival. Verbal registrations are not acceptable. All registrations are on a first come basis.

Location: Coastal HVAC Supply (I-45 North and BW8) 51 Esplanade Suite 100, Houston, TX 77060

Note: there is no "hands on training" in this seminar. There will be problem solving exercises at the end of each session. These problem solving exercises will help ensure mastery of the topics taught that evening.

A certificate will be awarded only upon successful completion of all requirements including: attending 90% of all class hours. Any absences must be made-up next time seminar is held to earn a certificate (at no additional fee).