{"product_id":"hvac-troubleshooting-guide-detailed","title":"HVAC Troubleshooting Guide (Detailed)","description":"\u003cp\u003eStop Googling on the job site.\u003cbr\u003eThis 14-page field guide covers every major HVAC fault — no cooling, no heat, refrigerant issues, electrical faults, airflow problems, gas furnace lockouts, and heat pump headaches — with step-by-step numbered fixes, exact values, and the tools you need for each repair.\u003cbr\u003eBuilt by a tech, for techs. Not a textbook. Not a manufacturer manual. A real field reference you can pull up on your phone between the truck and the door.\u003cbr\u003eIncludes full R-410A and R-22 pressure-temperature charts, superheat and subcooling targets, Delta T reference, static pressure limits, thermostat wiring color codes, and a complete PM checklist.\u003cbr\u003eInstant download after purchase. No waiting. No shipping. Use it on every call.\u003c\/p\u003e","brand":"DuctLife Co.","offers":[{"title":"Default Title","offer_id":50431380881622,"sku":null,"price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0840\/1551\/3814\/files\/Screenshot-20260913_072731_Claude.jpg?v=1789309711","url":"https:\/\/ductlifeco.com\/products\/hvac-troubleshooting-guide-detailed","provider":"DuctLife Co.","version":"1.0","type":"link"}