F&L HVAC Quick Reference Cards, Refrigerant Charging &Troubleshooting Guide

• Complete HVAC Tech Reference Set – Includes 4 double-sided cards covering refrigerant charging charts, pressure-temperature tables, troubleshooting flowcharts, and system diagnostic tips for air conditioners and heat pumps.
• Durable & Weatherproof – Printed on high-quality laminated material that’s waterproof, oil-resistant, and tear-proof — built to handle rugged job site environments.
• Quick & Accurate Readings – Clear, easy-to-read layout with color-coded refrigerant data helps technicians find critical information quickly without flipping through manuals.
• Portable Design – Includes a metal key ring for easy attachment to tool bags, belts, or HVAC service kits — perfect for field technicians on the go.
• Covers Common Refrigerants – Includes R-22, R-410A, R-134a, and other major refrigerants commonly used in modern HVAC systems.
• Ideal for Pros & Students – A must-have learning and diagnostic tool for both experienced technicians and HVAC apprentices.
• Made for Daily Use – Designed by HVAC professionals to improve workflow efficiency, service accuracy, and system troubleshooting speed.

Stay efficient, accurate, and confident on every job with the F&L HVAC Quick Reference Cards — your ultimate field companion for refrigerant charging, pressure diagnostics, and troubleshooting. Designed by HVAC professionals for HVAC professionals, this 4-piece laminated card set delivers instant access to critical data for air conditioners, heat pumps, and refrigeration systems — helping you save time, reduce guesswork, and improve service quality. Each card is double-sided, waterproof, and built to withstand harsh job site conditions. Whether you’re performing superheat/subcool calculations, checking system pressures, or identifying common issues, these quick-reference charts and guides give you the information you need — fast. Compact and easy to carry, the cards come bound by a durable metal ring so you can keep them clipped to your tool bag or belt. The clear, color-coded design makes it easy to find the right data in seconds, even in low-light conditions. F&L Industries is trusted by HVAC technicians nationwide for delivering durable, professional-grade tools that improve accuracy, efficiency, and productivity in the field.