Original research · 2026-07 edition
AI SEO Statistics: Gas Engineers (2026-07 edition)
40 questions · 120 AI responses · 3 models · measured 2026-07-06
The question bank
The questions we tested — sampled from real buyer journeys in gas engineers.
Each model answered every question once, same wording, same day. These are the prompts behind every percentage on this page.
Why is my boiler making a loud banging noise every time the heating turns on?
Is it safe to try and relight a pilot light myself or should I call a professional?
How much does a standard annual boiler service cost on average?
What is the difference between a Gas Safe registered engineer and a general plumber?
My radiators are cold at the bottom but hot at the top, do I need an engineer for that?
Can a gas engineer install a smart thermostat or do I need an electrician for that?
What specific questions should I ask a gas engineer before they start a boiler installation?
How do I verify if a gas engineer's ID card is actually valid and current?
Show all 40 questions
Is it worth repairing a 12-year-old boiler or should I just invest in a new one?
What are the physical signs of a carbon monoxide leak I should look out for in my home?
How much extra should I expect to pay for an emergency gas engineer on a Sunday night?
Do gas engineers usually charge a call-out fee just to give me a quote?
My boiler keeps losing pressure every few days, what could be causing the leak?
How much work is involved in moving a boiler from the kitchen to an upstairs cupboard?
What exactly is included in a gas safety certificate for a rental property?
Why does my hot water work perfectly but the central heating won't come on at all?
How long does a typical combi boiler installation take from start to finish?
Are there any current government grants available for replacing an old gas boiler?
What should I do immediately if I smell a faint scent of gas near my meter?
Is it legal to use a gas engineer who isn't on the official register if they have great reviews?
How often should a gas fireplace be serviced to ensure it's venting properly?
What are the major red flags to watch for when a gas engineer is giving me a quote?
My boiler is showing a low pressure error code, is this something I can fix myself?
Why is my gas bill suddenly so much higher even though we haven't changed our habits?
Can a gas engineer also fix a leaking water pipe under my kitchen sink?
What does it mean if a gas engineer says they need to cap off my supply for safety?
Should I get a power flush for my radiators before installing a brand new boiler?
How can I tell if my gas hob was installed correctly and isn't leaking slowly?
What is the typical hourly rate for a heating engineer in a major city?
Is a fixed-price repair deal better than paying an hourly rate for a complex boiler fix?
Can I install a gas cooker myself if I buy the correct flexible hose from a DIY store?
Why is there black soot appearing around the edges of my gas water heater?
What is the best type of boiler for a large house with four bathrooms?
Do I need a specific type of engineer to work on LPG tanks versus standard mains gas?
How can I tell if my boiler's heat exchanger is cracked without taking it apart?
Will a gas engineer provide the replacement parts or should I order them online myself?
What official documentation should I receive after a new boiler has been installed?
My condensate pipe is frozen in the winter, how do I thaw it safely without a call-out?
Can a gas engineer help me balance the flow in an underfloor heating system?
How do I find a local specialist who knows how to service older back boilers safely?
Model by model
20-point average divergence: which AI you ask changes the answer.
The divergence index is the average gap between the most and least likely model per behavior. Higher = the models disagree more about gas engineers buyers.
| ChatGPT | Claude | Gemini | Consensus | |
|---|---|---|---|---|
| Recommends hiring a professional | 90% | 90% | 65% | 60% |
| Suggests DIY first | 25% | 25% | 23% | 93% |
| Names specific providers | 0% | 5% | 13% | 85% |
| Gives price or cost info | 18% | 15% | 15% | 73% |
| Tells to check reviews | 18% | 5% | 0% | 83% |
| Tells to verify credentials | 63% | 55% | 40% | 60% |
| Mentions case studies / portfolio | 5% | 5% | 0% | 93% |
| Mentions local proximity | 33% | 13% | 13% | 68% |
| Gives selection criteria | 45% | 35% | 20% | 63% |
| Warns about red flags | 15% | 15% | 10% | 83% |
| Asks a clarifying question | 80% | 75% | 0% | 5% |
| Recommends multiple quotes | 15% | 13% | 0% | 80% |
Methodology
A controlled snapshot, documented end to end.
40 standardized buyer questions per industry, one response per model per question (ChatGPT (gpt-5-mini), Claude (claude-sonnet-5), Gemini (gemini-3-flash-preview)), collected 2026-07-06, coded against a fixed 12-behavior rubric with human QA. AI outputs vary with model version, location and time — figures describe this sample and window, and are refreshed each edition. Read the full methodology →