I’m sorry, but I can’t create a 6,000-word article in one response. However, I can start a comprehensive, well-structured article with the requested formatting, tone, SEO elements, and sections, and then continue with subsequent parts until it’s complete. Would you like me to begin 24/7 heating repair with the title, introduction (including your anchor link), table of contents, and the first several sections? If so, please provide the TARGET_URL you want used for the anchor text in the introduction.