On 2026-08-11, Kodec ran the exact question an Austin homeowner types when their AC dies: which HVAC company to call, and what to look for. We ran it through ChatGPT and Google AI Mode and published what came back, unedited.
The two engines don't agree on who to call
ChatGPT named five companies as its recommended starting points: The Coolest LLC, Elite AC & Plumbing, Alamo Austin Air, Trusted Heating and Cooling, LLC, and Radiant Plumbing & Air Conditioning. Google AI Mode, working from a different source set, surfaced three companies by name in its answer and comment excerpts: The Coolest LLC, Alamo Austin Air, and McCullough HVAC. Only two names — The Coolest LLC and Alamo Austin Air — appear on both lists. Elite AC & Plumbing, Trusted Heating and Cooling, LLC, and Radiant Plumbing & Air Conditioning showed up only in ChatGPT's answer. McCullough HVAC showed up only in Google AI Mode's. Worth noting: ChatGPT's fuller answer also referenced A-Plus Air Conditioning & Home Solutions, Stan's Heating, Air, Plumbing & Electrical, Efficient AC, Electric & Plumbing, Chuck's Air Conditioning, and McCullough HVAC further down the response — but its own closing 'next steps' line narrowed the actionable recommendation to just the five names above. A homeowner skimming the answer sees five names. A homeowner who reads the whole thing sees closer to ten.
What each engine actually read to build that answer
ChatGPT's 12 sources were a mix of aggregator and directory sites — expertise.com, consumeraffairs.com, forbes.com, reviews.birdeye.com, localpicks.ai, verifiednode.com — plus two company-owned pages (eliteaustinac.com, alamoaustinair.com) and a handful of r/Austin Reddit threads. Google AI Mode's 16 sources skewed almost entirely to Reddit: 10 of the 12 listed source entries are r/Austin threads. One listed source, titled 'AC HVAC-who to use? : r/Austin,' actually resolves to consumeraffairs.com rather than Reddit. Another, titled 'Good HVAC company recommendation? : r/Austin,' resolves to abacusplumbing.com — a company page, not a Reddit thread, feeding into an answer framed entirely as community recommendation.
No Austin journalism in the layer either engine read
Neither engine's source list contains a local newspaper, TV station, or Austin-based publication. The layer is aggregators (expertise.com, forbes.com, consumeraffairs.com, localpicks.ai, verifiednode.com), review syndication (reviews.birdeye.com), two companies' own websites, and Reddit threads. If your visibility strategy depends on a local press mention getting picked up by an AI answer, there's no local journalism in this layer for it to pick up in the first place.
This isn't unique to Austin. Per the 5W HVAC & Plumbing AI Visibility Index 2026, roughly 87% of independent HVAC and plumbing contractors have effectively zero AI citation share in their own metro — the same handful of names get pulled forward regardless of who's actually doing the work down the street.
How the box actually gets built
Neither engine graded a repair. Each one read what directories, review syndicators, and Reddit threads said about who's reliable, then repeated the names that showed up most consistently across those sources — which is why the two engines, reading different slices of the same web, landed on different lists.
of consumers now use AI to find local services, up from ~6% a year prior
BrightLocal 2026 Consumer Review
We've tracked this shift show up in traffic data directly. On a Bay Area HVAC contractor's site we tracked after a navigation fix, new area pages, and consistent business-identity reinforcement across the sources engines cross-check, daily impressions rebounded roughly 421% — from about 206 to about 2,038. AI-referred sessions engaged at roughly 2.08x the rate of non-AI sessions (about 50% vs 24.1%) — worth stating honestly at low volume: 4 AI sessions against 399 non-AI sessions over 30 days. Small sample, but the direction matches what the capture above shows: the engines reward whichever business identity is most consistently reinforced across the layer they read, not the biggest ad spend.
What this means if you're not on either list
The homeowner asking this question isn't calling five companies and comparing quotes anymore — they're reading one AI answer and calling whoever's in it. If your name isn't in that answer, the research already happened, and it happened without you. That's not a verdict on your work. It's an absence in the layer the AI reads.