Chapter 32 — Metering Device and Refrigerant Diagnostics · 36
Figure 32.2 — Comparison Table
Gives a side-by-side diagnostic checklist to distinguish a mechanical restriction from an actual low charge before adding refrigerant unnecessarily.
Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 2
By Roberto M. Morales
Miami HVAC contractor · 20+ years in the field
Compressors, Refrigerant Diagnostics, Superheat, Subcooling, Decision Trees, Case Studies, and Professional HVAC Troubleshooting
Compare restriction and undercharge patterns, original cooling-case readings and diagnostic decision trees.
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Available New releaseAdvancedEnglishProfessionals
HVAC Professional Books · Field DiagnosticsStop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 2
Compressors, Refrigerant Diagnostics, Superheat, Subcooling, Decision Trees, Case Studies, and Professional HVAC Troubleshooting
By Roberto M. Morales
Transform measurements into reliable diagnostic decisions. Follow complete-system evidence, identify the true root cause, and verify every repair.
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- 368 pages of field-tested material
Watch the book in action
Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 2 — 360° showcase and interior tour
Full rotation of the printed edition followed by a walk-through of real interior pages.
Written by Roberto M. Morales
20+ years of real HVAC field experience
Step-by-step HVAC diagnostic system
Covers airflow, refrigerant, electrical & compressor
Practical field guide for HVAC technicians
Why this book matters
Real field experience, not recycled theory
Difficult and repeat service calls are rarely solved by one reading. Volume 2 teaches technicians to gather evidence across airflow, refrigeration, compressor, and electrical systems, organize it with decision trees, and confirm the true root cause before and after the repair.
What readers will learn
Skills you take away
Every item below is covered directly in the book.
Read and interpret compressor diagnostic numbers
Separate compressor electrical failures from mechanical failures
Diagnose refrigerant metering devices and condensers
Evaluate refrigerant charge using superheat and subcooling
Follow structured diagnostic decision trees
Troubleshoot the complete system, not one component
Work through real-world HVAC case studies
Apply preventive maintenance and professional documentation
Communicate findings clearly to customers
Perform root-cause analysis and verify every repair
Written for
Who this book is for
- Intermediate technicians
- Experienced service technicians
- Advanced HVAC students
- Maintenance professionals
- Field supervisors
- Contractors
- Technicians handling difficult or repeat service calls
The printed edition
3D book gallery
Photorealistic studio shots of the printed edition — front cover, 3/4 front, 3/4 back, side profile and top-down. Click any view to enlarge.
Airflow learning path
Foundation → Advanced Volume 1 → Advanced Volume 2
Three books, one progression. Start with the fundamentals, move into advanced field measurements, then finish with complete-system troubleshooting.
Step 1 — FoundationStop Guessing: HVAC Airflow Made SimpleBuild the airflow fundamentals: static pressure, restrictions, blower basics, and a repeatable field-testing process.View this book →Step 2 — Advanced Volume 1Advanced Airflow Diagnostics — Volume 1Advanced field measurements: TESP, CFM per ton, cooling and heating performance, blower motors, and system performance.View this book →Step 3 — Advanced Volume 2Advanced Airflow Diagnostics — Volume 2Compressors, refrigerant diagnostics, superheat and subcooling, decision trees, and complete-system case studies.You are here
Why HVAC professionals trust this work
Built from the field, written for the field
Every chapter is shaped by real service calls — not classroom theory.
20+ years of real field experience
Written by a working HVAC company owner in Miami — not a lecturer.
Designed from actual service calls
Every diagnostic pattern comes from real jobs on real equipment.
For technicians, apprentices, and beginners
Structured to meet you where you are and take you further.
Practical knowledge you can apply immediately
Clear language, real numbers, and steps you can use on the next call.
Part of a complete learning system
One consistent method used across the full HVAC catalog.
Written for lasting career value
Skills that hold up whether you're new to the trade or building a business.
Reader reviews will appear here once the first approved review is published.
About the author
Roberto M. Morales
Roberto M. Morales is the owner of an HVAC company in Miami and an author with more than 20 years of hands-on experience in the field. His work focuses on turning real service-call knowledge into clear, structured systems that technicians can actually use — on the roof, in the attic, and at the electrical panel.
This book is part of a growing catalog spanning HVAC professional and beginner titles, homeowner guides, romance, artificial intelligence, children's books, and Spanish editions.
FAQ
Frequently asked questions
Directly on this website — choose your format above and check out securely with Stripe.
Written for intermediate technicians, experienced service technicians, advanced hvac students, maintenance professionals, field supervisors, contractors, technicians handling difficult or repeat service calls.
This title is classified as Advanced.
English.
Choose your format
Book price + applicable sales tax. That's all.
FREE Standard Shipping — 48 Contiguous U.S. States
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Faster shipping, Alaska, Hawaii, Puerto Rico & Canada: optional, paid, shown before payment.
Secure checkout on RobertoMMorales.com. Printed to order and shipped with tracking.
Secure Stripe payment · Arrives damaged, misprinted or wrong? Report within 30 days for a replacement or refund. Policy
Professionally Printed. Carefully Packaged. Delivered with Care.
Seeing Is Believing!
Prefer to study in Spanish? This book is also available as DEJE DE SUPONER: Diagnóstico Avanzado del Flujo de Aire — Volumen 2, the Spanish edition by Roberto M. Morales.
Related HVAC books
More HVAC diagnostic books in this series
Available
The Complete HVAC Troubleshooting System
A complete diagnostic system built on 20+ years of hands-on HVAC experience — engineered to help technicians diagnose faster, stop guessing, and fix it right the first time.
View The Complete HVAC Troubleshooting System AvailableStop Guessing: HVAC Airflow Made Simple
A practical field guide that helps HVAC technicians understand airflow, measure system performance correctly, diagnose restrictions, and solve comfort problems with confidence.
View Stop Guessing: HVAC Airflow Made Simple AvailableStop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1
Move beyond basic airflow. Learn how to measure, interpret, and connect the operating numbers that reveal what the complete HVAC system is doing.
View Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1Continue your HVAC airflow training
Build the rest of your diagnostic system with the companion field guides in the Stop Guessing series.
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Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1
Move beyond basic airflow. Learn how to measure, interpret, and connect the operating numbers that reveal what the complete HVAC system is doing.
Next bookStop Guessing: HVAC Electrical Wiring Made Easy
A field-tested guide that teaches HVAC technicians how to read wiring diagrams, diagnose electrical faults, troubleshoot controls, and wire HVAC circuits safely and with confidence.