Gecko Cool Heat Diagnostics Gecko Cool Heat DiagnosticsSend a video of your oil heating, heat pump, or plumbing problem to a NAPIT-registered specialist. Get a proper written diagnosis, a safe DIY fix if there is one, and a clear plan if there isn't.
Send your video See what we coverNo mains gas boiler work — oil heating, heat pumps, and general plumbing only.
Rural oil heating, modern heat pumps, and everyday plumbing problems all suffer from the same issue: too few engineers, too long a wait. That's the gap we fill — remotely, fast.
For homes off the gas grid relying on oil-fired heating and hot water.
Air-to-water and air-to-air systems. F-Gas registered, so we can speak to refrigerant-side faults most heating engineers can't.
Everyday plumbing issues around the home, diagnosed before you pay for a callout.
Fill in the form and pay securely upfront. No appointment to book — send it whenever suits you.
Send a short video of the fault happening, plus photos of the data plate (model & serial number) and any error code on display — the more we can see, the better the answer.
We reply with a written assessment: what's likely wrong where it's possible to tell remotely, what you can safely check or do yourself, and exactly what to say if you need an on-site engineer. If it genuinely can't be pinned down from what you've sent, we'll tell you clearly rather than guess.
Simple, upfront pricing. No hidden fees, no contract.
Send photos, video, and error codes. A written assessment back within a few hours.
Send nowYou're speaking to a properly certified engineer, not a call centre.
Certified under NAPIT's Competent Person Scheme for oil heating installation and servicing work.
Qualified to handle refrigerant-related work, giving genuine expertise on heat pump faults — not just guesswork.
Qualified to work on unvented hot water cylinders, so cylinder faults get a properly informed diagnosis too.
Hands-on experience diagnosing real faults on real systems, not a script — advice grounded in what actually goes wrong.
Sometimes — plenty of faults are a simple reset, a pressure top-up, or a setting change you can do yourself once we've talked you through it. Where a physical repair or a legal safety check is needed, we'll tell you clearly and you'll know exactly what to ask for, saving you a wasted or overpriced callout.
No. We cover oil-fired heating, heat pumps, and general plumbing. For gas appliances you'll need a Gas Safe registered engineer.
Some faults genuinely need hands-on inspection to pin down. Where that's the case, we'll tell you clearly rather than guess, and explain what would help next — whether that's more photos, a specific test to run, or an on-site engineer. You still get a useful answer, just not always a definitive one.
The video review works anywhere with an internet connection — you don't need to be near us for a remote diagnosis.
What this service can and can't do, and what's expected of you if you carry out any DIY work based on our assessment.
We are not Gas Safe registered. If your issue involves a mains gas boiler or appliance, you must use a Gas Safe registered engineer — we cannot legally advise on or diagnose mains gas work, and any assessment we give is limited to oil, heat pump, and plumbing systems only.
Some faults simply can't be identified with confidence from video and photos alone — intermittent electrical faults, certain unvented cylinder issues, and problems that need pressure or flow testing are common examples. Where that's the case, we'll tell you rather than guess, and explain what an on-site engineer should check.
Where we suggest a DIY check or fix, it's because it's something a reasonably competent homeowner can safely attempt — not because we've inspected your system in person. Before carrying out any DIY work:
Any DIY work you choose to carry out — including any resulting damage to your property, your system, or third-party property — is undertaken at your own risk and on your own decision. We are not on site to supervise, and our assessment is based only on what you've shown and told us. We're not liable for damage, injury, or loss arising from DIY work you decide to carry out, except where that loss results from our own negligence in the advice given based on the information you provided.
If at any point you smell gas, suspect a carbon monoxide leak, see fire, or believe there's an immediate danger to health or property — stop immediately. Call the National Gas Emergency Service on 0800 111 999, or 999 in a fire or medical emergency. Do not wait for a reply from us, and do not attempt DIY work in these circumstances.
By booking and paying for a review, you confirm you've read and accepted this section. If anything here is unclear, ask us before booking rather than after.
Send a video today and get a proper answer before you spend money on a callout.
Send your video£15 per review. Two quick steps below — upload your video/photos, then pay and confirm your details. We'll reply with your written assessment within a few hours.
Before you start — what's useful to include
— A short video (10–30 seconds) showing the fault happening — the boiler trying to fire, a strange noise, or where water's leaking from
— A clear photo of the data plate — the model and serial number, usually a sticker inside the casing or on the side of the unit
— A photo (or video, if it flashes/cycles) of any fault or error code on the display
— Photos of anything visibly wrong — corrosion, damp, loose pipework, the pressure gauge reading
Step 1 — Upload your video & photos
Tap the button, select or take your video/photos, then tap Copy once they've uploaded.
Step 2 — Pay & submit your details
Pay £15 & submit your reviewPaste the link you copied in Step 1 into the "Video/photo link" field during checkout, along with your system type and a quick description of what's happening.
By booking you agree to our scope, limitations & terms — please read before paying.
Can't send a video or photos?