{"product_id":"n8n-warranty-registration-workflow-sheets-gohighlevel-gpt-4o-reminders","title":"n8n Warranty Registration Workflow: Sheets + GoHighLevel GPT-4o Reminders","description":"\u003ch3\u003eAutomatically register warranties and send daily service reminders with n8n + Google Sheets + GoHighLevel\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow captures warranty registrations from an n8n Form or a webhook, stores them in \u003cstrong\u003eGoogle Sheets\u003c\/strong\u003e, upserts the buyer into \u003cstrong\u003eGoHighLevel\u003c\/strong\u003e, sends a welcome SMS and HTML warranty certificate, and then runs \u003cstrong\u003edaily at 9:30 AM\u003c\/strong\u003e to generate and deliver OpenAI-written service and warranty reminders.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceives warranty registrations\u003c\/strong\u003e via a hosted n8n Form trigger or a DMS\/POS webhook.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNormalizes and validates data\u003c\/strong\u003e, calculating warranty end and next service dates.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrevents duplicates\u003c\/strong\u003e by checking the Google Sheets Warranty Registry and filtering out duplicate serial\/VIN numbers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCreates\/updates CRM records in GoHighLevel\u003c\/strong\u003e by upserting the customer as a contact with tags and notes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSaves warranty details to Google Sheets\u003c\/strong\u003e by appending a registry row for each eligible registration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSends welcome communications\u003c\/strong\u003e through GoHighLevel Conversations, including a welcome SMS and an \u003cstrong\u003eHTML warranty certificate email\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRuns daily reminder logic\u003c\/strong\u003e to determine whether each registration is service-due, overdue, or nearing warranty expiry.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrafts reminder content with OpenAI\u003c\/strong\u003e (gpt-4o-mini) and sends reminders via GoHighLevel, then updates reminder stage fields in Google Sheets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTracks service\/renewal cycles\u003c\/strong\u003e: when a new paid service or warranty renewal starts, it creates a GoHighLevel opportunity and saves the opportunity ID back to the matching registry row.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWarranty registration for businesses using n8n forms or POS\/DMS webhook submissions.\u003c\/li\u003e\n  \u003cli\u003eAutomated customer onboarding: SMS welcome + HTML warranty certificate email.\u003c\/li\u003e\n  \u003cli\u003eOngoing retention: daily service and warranty expiry reminders written with OpenAI and delivered through GoHighLevel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorkflow nodes\/tools:\u003c\/strong\u003e if, set, code, webhook, sticky note, form trigger.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrations:\u003c\/strong\u003e Google Sheets (Warranty Registry), GoHighLevel (contacts, conversations, opportunities), OpenAI (gpt-4o-mini).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSchedule:\u003c\/strong\u003e daily at \u003cstrong\u003e9:30 AM\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":46196346552499,"sku":"N8N-20434","price":8.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/Ld-QyA4AgwPdfh17Q_4SK_TMvwr6LK.png?v=1791623873","url":"https:\/\/buyflowscripts.com\/products\/n8n-warranty-registration-workflow-sheets-gohighlevel-gpt-4o-reminders","provider":"N8N Commerce","version":"1.0","type":"link"}