Car AC and Heating Repair

Fix your car's air conditioning and heating yourself — and save hundreds on shop visits.

Car AC and Heating Repair is a premium, fully offline toolkit that turns real HVAC know-how into hands-on tools you can use right in the driveway. It's not just a book — it's a complete diagnostic workshop in your pocket.

WHAT'S INSIDE
• 8 interactive tools: Manifold Pressure Decoder, Vent Temp (ΔT) health check, Refrigerant Recharge Estimator, Static Pressure Check, Compressor Duty Cycle, Coolant Mix Calculator, Cabin Filter Life, and DIY vs Shop Savings.
• Step-by-step Service Roadmap: a phase-by-phase checklist from diagnosis to repair, so you always know the next move.
• Learn & test yourself: chapter quizzes with instant feedback, a full HVAC glossary, and an image gallery.
• Progress & achievements: animated progress rings plus 12 unlockable badges as you read, repair, and pass quizzes.
• The complete illustrated 12-chapter handbook, included as a bonus — read it anytime, fully offline.
• 24 free "Max" stickers to share with friends in any chat app.

BUILT RIGHT
• 100% offline — no internet permission at all. Your data never leaves your device.
• No ads. No subscriptions. No in-app purchases. Pay once, own it forever.
• Looks great on phones, tablets and foldables, with full light and dark themes.
• Metric or imperial units, adjustable text size, and haptic feedback.

TOPICS COVERED
AC system anatomy (compressor, condenser, evaporator, TXV) • the heater side, heater core and blend doors • R-134a vs R-1234yf and EPA 609 • reading manifold gauges • leak detection with UV dye, electronic sniffers and the soap test • recharge cans and when to skip them • blend-door actuators, the real #1 failure • compressor and clutch diagnostics • cabin filters, mode doors and smelly-AC fixes • cold-cabin heat diagnosis • seasonal prep and long-term care.

Whether your AC blows warm, your heater runs cold, or you just want to stop overpaying, this app gives you the tools and the confidence to do it yourself.

Always follow your vehicle's service manual and observe local refrigerant-handling laws (EPA 609 in the US).

© ChatStick Company Limited