ECO4 Boiler Grant Scams: Warning Signs and Consumer Checks
ECO4 is a genuine government-backed energy-efficiency scheme, but not every “free boiler grant” advert, cold call or doorstep offer is genuine. Fraudsters and poor-quality lead generators can borrow official language, use crown-style graphics, promise guaranteed approval and pressure households into sharing personal information or signing paperwork before proper checks. Citizens Advice specifically warns that adverts and cold callers offering ECO funding may set unrealistic expectations, while the Advertising Standards Authority has acted against misleading government-style boiler grant advertising.
This guide explains how ECO4 works, the main scam warning signs, how to verify a provider and what to do after sharing information, paying money or receiving work.
Check your ECO4 eligibility
Answer a few quick questions to see whether your household may qualify for ECO4 support.
Quick answer
ECO4 is real, but “ECO4 boiler grant” is marketing shorthand. Ofgem states that ECO is an obligation on energy suppliers, not a direct household grant. Funding and any customer contribution depend on the property, eligibility, survey and supplier decision. Be suspicious if someone guarantees a free boiler without an assessment, claims to be “from the government”, demands immediate payment, will not identify the supplier or installer, asks for excessive personal data or refuses a written contract. Verify the business independently through TrustMark, Gas Safe Register and Companies House, then contact the named supplier or council using details you find yourself.
may not include ongoing servicing or unlimited aftercare. Replacement or upgraded boilers must normally have at least a two-year installer-supplied warranty; an eligible repair must have at least one year of cover. You may also receive a longer manufacturer’s warranty, often subject to registration, correct commissioning and annual servicing. Aftercare should include handover information, operating instructions, documentation and a complaints route. It does not necessarily include annual servicing, breakdown cover, emergency attendance, radiators, pipework or faults caused by poor maintenance. Request the full terms in writing before installation.
Is ECO4 genuine?
Yes. ECO4 operates across Great Britain and requires obligated energy suppliers to support energy-efficiency improvements in eligible homes. The scheme has been extended to 31 December 2026. It takes a whole-house approach: a pre-retrofit assessment may identify insulation, ventilation, heating controls or other measures rather than a boiler alone.
However, Ofgem is clear that ECO is not a grant scheme in the usual sense. Suppliers decide which projects to fund, the support offered and the retrofit businesses used. Eligibility does not guarantee installation, and some households may need to contribute. An unsolicited promise of a “100% free government boiler, guaranteed today” therefore needs careful checking.
Genuine ECO4 offer or suspicious approach?
| Check | More consistent with a genuine process | Warning sign |
|---|---|---|
| Identity | Gives a legal company name, address and clear role | Uses “Energy Department” or “local energy adviser” |
| Government link | Says ECO4 is government-backed | Claims to be GOV.UK or uses misleading crown branding |
| Eligibility | Explains that checks and a survey are required | Guarantees approval after a few questions |
| Survey | Assesses the property before specifying measures | Promises a particular boiler without inspection |
| Payment | Discloses any contribution in writing | Demands a deposit or transfer immediately |
| Installer | Provides verifiable TrustMark and Gas Safe details | Avoids naming the installer |
| Contract | Sets out work, cost, warranties and cancellation | Pressures you to sign a tablet or incomplete form |
| Communication | Allows independent checks | Says funding or a postcode slot expires today |
The Advertising Standards Authority has upheld complaints where boiler-funding adverts used GOV.UK-style branding that misleadingly implied government affiliation. ICO enforcement also shows that the home-energy sector has generated unlawful automated marketing calls using official-sounding labels and scripted “local adviser” identities.
Warning signs of an ECO4 boiler grant scam
1. “We are calling from the government”
Government-backed does not mean government-operated. Ofgem administers ECO4, suppliers fund projects and private companies may assess or install measures. Ask for the legal business name, company number, address and the supplier or council they represent.
Official-looking branding is not proof. The ASA has previously ruled that the combination of GOV.UK wording, crown imagery and a grant-related domain could misleadingly imply that a private advertiser was affiliated with the Government.
2. Approval is guaranteed before a survey
A provider cannot know the final package from your benefits status or postcode alone. Assessment considers household eligibility, ownership or landlord permission, the property’s energy performance, existing heating and the improvements required.
Ofgem states that eligibility does not guarantee that an energy supplier or installer will proceed with measures. A retrofit assessment is also needed to determine which improvements would benefit the property.
3. You must act immediately
Claims that an allocation expires in hours or you will lose funding unless you sign now are pressure tactics. A legitimate business should allow time to read the contract, check credentials and seek another view.
Do not let a cold caller rush you into making a decision. Citizens Advice recommends finding and checking an installer independently rather than using a business you have not had time to investigate.
4. Excessive personal information is requested
Evidence may be required, but do not send benefit letters, identity documents, bank statements, National Insurance numbers or photographs through an unverified link. First confirm who controls the data, why it is needed, how it is stored and who receives it.
Scammers may impersonate energy companies or government departments specifically to obtain personal or banking information. Citizens Advice recommends avoiding links and contact details supplied in suspicious messages.
5. The website is only collecting leads
Some sites collect enquiries and pass details to installers. Read the privacy notice for “partners”, “selected installers” and marketing consent. You should know who will receive your data.
Check whether the website clearly identifies the legal business operating it. Compare the company name, registration number, address, telephone number and privacy-policy details rather than relying on the trading name shown in the logo.
6. The surveyor cannot prove who sent them
Do not rely on clothing, a badge or leaflet. Confirm the appointment directly using independently sourced contact details. Ask who the Retrofit Coordinator and installer are, and do not sign completion paperwork during an initial survey.
A genuine representative should be comfortable waiting while you telephone the business, council or supplier to verify the appointment.
Ten checks before accepting an ECO4 boiler offer
| Check | What to do |
|---|---|
| 1. Company | Search the exact legal name and number at Companies House; compare its status and address. |
| 2. TrustMark | Confirm the business, relevant licensed trade and current registration. |
| 3. Gas Safe | Verify the business and attending engineer; check the engineer’s ID card and work categories. |
| 4. Funding route | Ask which obligated supplier funds the project or which council made the Flex referral; confirm independently. |
| 5. Scope | Obtain every measure, product, enabling work and exclusion in writing. |
| 6. Cost | Ask for the total price, funded amount, customer contribution and finance terms. |
| 7. Contract | Check cancellation, start date, complaints, warranties, guarantees and responsibility for damage. |
| 8. Survey | Expect a property assessment before the final specification. |
| 9. Data | Use a verified channel and ask why each document is required. |
| 10. Evidence | Save adverts, telephone numbers, emails, contracts, survey reports and payments. |
Companies House registration alone is not proof that a trader is competent or trustworthy; Companies House itself notes that it does not verify the accuracy of all filed information. For ECO4 delivery, Ofgem says installers must generally be TrustMark registered. Gas-boiler work must also be carried out by an appropriately Gas Safe registered business and engineer.
What should the survey and installation involve?
ECO4’s whole-house process should assess the home rather than simply photograph the boiler. Depending on the project, it may consider insulation, ventilation, heating demand, controls and the energy rating. The proposed work should be specified and explained before installation.
Before work starts, obtain the contract, specification, installer details, warranties, contribution and complaints route. Confirm what parts of the home will be affected and who will make good disturbed finishes.
Ask for written answers to practical questions:
- Which measures are being funded?
- Which measures are compulsory for the project?
- What boiler or heating system is proposed?
- Will radiators, pipework, controls or ventilation change?
- Will you have to pay anything?
- Who is responsible for warranties and future repairs?
- What happens if funding is declined?
- Who handles complaints?
After a gas-boiler installation, retain commissioning information, the manufacturer warranty, Gas Safe paperwork and ECO4 handover documents. Qualifying gas installations should also be notified for Building Regulations purposes.
Costs, deposits and “free boiler” claims
There is no single ECO4 boiler price. Some projects are fully funded; others require a contribution. Ofgem advises households asked to contribute to shop around. The amount should be clear before agreement, not introduced later as an unexplained “release fee”, “admin charge” or urgent deposit.
Payment is not automatically evidence of fraud, but never transfer money solely because funding is said to be disappearing. Request an itemised quotation and contract. Check:
- Who receives the payment
- Whether finance or credit is involved
- Whether interest or fees apply
- What happens if funding is declined
- Whether the payment is refundable
- Whether the price can change after the survey
A proper survey is necessary for an accurate proposal.
What to do if you think you have been targeted
Stop contact and do not click more links. If you paid or disclosed banking credentials, contact your bank immediately. Change compromised passwords, monitor accounts and preserve evidence.
For fraud affecting England, Wales or Northern Ireland, use Report Fraud or call 0300 123 2040. In Scotland, contact Police Scotland on 101. Suspected abuse of an Ofgem environmental scheme can be reported to Ofgem’s counter-fraud team, while nuisance marketing calls can be reported to the ICO.
If work has already been installed, complain to the installer in writing. Most ECO measures fall under TrustMark processes, and Ofgem advises consumers to follow the TrustMark complaints route. Report gas-work concerns to Gas Safe Register.
If you smell gas, suspect carbon monoxide or think the system is unsafe, stop using it and seek urgent specialist help.
Consumers who arranged work online, by telephone or at home will often have a 14-day cooling-off period, subject to exceptions and the circumstances in which work began. Act promptly and obtain individual consumer advice if you want to cancel.
Why the installer matters as much as the funding
A genuine funding route does not guarantee good workmanship. Poor surveying, sizing, ventilation, controls or commissioning can reduce comfort, efficiency, safety and system life.
Recent parliamentary scrutiny of ECO4 and the Great British Insulation Scheme found widespread serious defects in sampled solid-wall insulation installations. Although those findings relate primarily to insulation rather than boilers, they demonstrate why consumers must verify the people, standards, documents and guarantees behind any retrofit installation instead of relying on the scheme name alone.
Frequently asked questions (FAQs)
Clear answers about whether ECO4 is genuine, free-boiler claims, eligibility guarantees, cold calls, caller-ID spoofing, tenants, landlords and independent company checks. Speak to Simple Green Energy .
Unsure whether an ECO4 offer is genuine?
Speak with Simple Green Energy about eligibility claims, supplier or council relationships, company identity, proposed measures and the checks to complete before signing or paying anything.
Check an ECO4 offerConclusion:
ECO4 is legitimate, but no logo, leaflet, cold call or social advert proves that the contacting business is authorised, competent or offering suitable work.
Protect yourself by taking five steps:
- Identify every organisation involved.
- Verify TrustMark and Gas Safe credentials.
- Confirm the supplier or council funding route independently.
- Insist on a proper survey and written contract.
- Refuse pressure, unexplained payments and guaranteed claims.
Before agreeing to ECO4 boiler work, speak with Simple Green Energy for a clear explanation of eligibility, proposed measures, installer credentials, costs and consumer protections.
