Which ombudsman covers heat network suppliers?

That matters because heat network households cannot switch. The Commons Library records that households getting their heat through a heat network are not covered by the energy regulator Ofgem, and that gas supply to a network is regulated as a commercial supply while heat supply to homes is not³. With no competitive market to move to, an independent dispute route is the main consumer lever a household has.

The route has conditions. A complaint normally goes to the heat supplier first, and the Ombudsman can take it after eight weeks without resolution or on receipt of a Deadlock Letter⁴. The service is free to the consumer, and from 1 April 2025 it covers small businesses as well as households¹.

The Energy Ombudsman: the scheme that covers heat network suppliers

The Energy Ombudsman handles disputes across the energy sector, and its remit lists energy suppliers, energy brokers, network operators, green deal providers and heat network suppliers⁵. Ofgem's own consumer guidance points households to the Energy Ombudsman as the independent service, separate to Ofgem, for problems with a supplier, broker, network operator or heat network supplier⁷. The separation is deliberate: Ofgem regulates, the Ombudsman adjudicates individual cases.

For heat networks the scheme is funded as a free and independent dispute resolution service for Heat Network consumers, a formulation repeated across the supplier pages the Ombudsman publishes⁶. Those pages exist because the scheme lists the networks it covers by operator name, and the test is a matching one: the supplier name on the page must match the company name written on the account holder's bill⁸. Networks listed include housing associations, management companies and dedicated heat suppliers, among them Metropolitan Infrastructure Limited, Sanctuary Housing Association, ESP Heat Ltd, London Square Spitalfields Management Company Ltd, Theodore Stevenage Limited, Theodore Bracknell Limited, Cardiff Community Housing Association Limited, Cynon Taf Community Housing, Vivid Housing Limited, Barnet Homes, Edmunds House Management Company Ltd and Kelham Company Ltd Works RTM⁸.

The scheme also reaches beyond its listed networks in one specific circumstance: it can review disputes with any heat network if the heat network supplier has not done what is required of them by the Energy Bill Relief Scheme and Energy Bill Discount Scheme legislation²⁰. That is a narrow gateway tied to those schemes rather than a general power over every network.

The wider regulatory picture is still forming. Ofgem has been appointed regulator and will be able to act on unfair price hikes and poor service²¹, and the Department is working with Ofgem to ensure that, as regulation matures, Heat Network customers receive similar levels of protection as customers on other types of heating²². Until that matures, the Ombudsman is the operative redress route rather than the regulator.

What it can investigate, and who qualifies

The Ombudsman's remit covers issues with an energy supplier, energy broker, network operator, green deal provider or heat network supplier⁵. On a heat network, that means the service relationship between the household and the operator: billing, metering, service failures and how a complaint was handled. It is not a route for challenging the price of heat as a matter of policy, which sits with the regulator as regulation matures²².

Eligibility has three practical parts. The dispute must be unresolved; the household must have complained to the supplier already; and the supplier name must match the account holder's bill⁸. The scheme states it can process complaints for both domestic and small business consumers in the energy sector⁵, and from 1 April 2025 it can help consumers and small businesses resolve heat network disputes¹.

There is one carve-out worth knowing. A temporary, limited exemption is in place for small heat networks with ten or fewer connected premises²³. Households on those networks sit outside the protections that apply to larger ones, which is a gap rather than a benefit.

Territory matters too. In Northern Ireland both consumer protection and regulation of heat networks are devolved to the Northern Ireland Assembly³, so the Great Britain scheme described here does not simply extend across the UK. Scotland and Wales operate within the Great Britain framework, with advice bodies publishing their own guidance for heat network customers²⁴.

The 8-week rule and the Deadlock Letter

Two clocks run before a heat network dispute can be escalated. The first is time: the heat supplier has 8 weeks to resolve the complaint²³, and the Ombudsman's own eligibility wording asks whether it has been at least 8 weeks since the issue was first raised with the supplier, or whether a Deadlock Letter has been received⁴. Ofgem's decision on consumer protection guidance confirms that the period after which a complaint can be escalated to the Energy Ombudsman remains eight weeks for heat networks²⁶.

The second is the Deadlock Letter. Ofgem describes the trigger as receiving a deadlock letter stating the problem cannot be fixed or that the company believes there is no more it can do⁷. A Deadlock Letter short-circuits the wait: the household does not need to sit out the full eight weeks once the supplier has put its position in writing.

For problems that started before 1 April 2025 on a network registered with Heat Trust, the same eight-week wait applies after the first complaint to the supplier²⁴. The Ombudsman's supplier pages set out the requirement in the same terms, asking whether a deadlock letter has been received or whether it has been 8 weeks without the complaint being resolved¹⁰.

The practical sequence is therefore: complain to the supplier in writing and keep the date; wait for a resolution, a Deadlock Letter or eight weeks; then escalate. The date of that first complaint is not incidental, because the scheme asks for sufficient evidence to support the case, including the date the complaint was raised with the supplier⁹.

What the Ombudsman can decide: awards up to £10,000 and their limits

The financial ceiling for heat network disputes is up to £10,000 for domestic energy disputes or up to £20,000 for small business disputes². The same page notes that the level of maximum financial award may vary depending on the type of energy company and the Terms of Reference that cover that scheme², so the ceiling is scheme-specific rather than universal.

The ceiling is not the expectation. The Ombudsman states that it can offer financial awards up to £10,000 and that its average award is around £50⁵. A household should read the maximum as the outer limit of what a caseworker may order in an exceptional case, not as a likely outcome.

What the scheme cannot do is as important as what it can. It cannot punish companies, dictate how companies operate, or issue fines². That shapes the remedy: the outcome is typically a correction, an explanation, an apology or a payment to the consumer, rather than a penalty on the operator. Where a service outage has occurred, compensation can be awarded to customers who suffer a service outage through the Energy Ombudsman²⁷.

For households weighing whether to escalate, the calculation is about remedy rather than punishment. A billing error, an unmetered or estimated charge, a failure to respond or a service failure are the kinds of matters that fit the scheme's scope⁵. A dispute about the level of heat pricing as a matter of policy does not, and belongs with the regulator as the framework develops²².

How to contact the scheme and start a heat network complaint

The Energy Ombudsman takes heat network enquiries on 0330 440 1624, pressing option 3 for Heat Networks when prompted⁴. Where a heat network is not registered on the Ombudsman's website, the same number is the route to raise a dispute²⁰.

Before that call, the first step is to contact the heat network supplier and ask them to fix the situation²⁰. The Ombudsman's supplier pages set out the same prerequisite, asking whether the complainant has complained to the named supplier already⁹. The scheme's own guidance is explicit that the party responsible for handling complaints is the Energy Ombudsman, but that consumers should first notify their heat supplier and try to resolve the issue²³.

The evidence the scheme asks for is a supported case, including the date the complaint was raised with the supplier⁹. In practice that means the original complaint, the supplier's replies, the account details showing the supplier name, and any Deadlock Letter. The supplier name on the account must match the company named in the dispute⁸.

For households on a network that is not listed, or where the operator cannot be identified, the phone route is the practical starting point rather than the online form²⁰. Advice bodies in Scotland and Wales publish their own heat network guidance for advisers and caseworkers, which can help a household assemble the timeline before escalating²⁴.

How long a case takes and what happens after a decision

The scheme's own case material shows how quickly a well-evidenced dispute can close: one case study records the complaint being brought to a close within a few days of Energy Ombudsman receiving it²⁸. That is a single example rather than a service standard, and the timeline depends on the evidence supplied and the supplier's responsiveness.

After a decision, the question is compliance. The Ombudsman cannot issue fines or punish companies², so its decisions operate as recommendations that members are expected to honour under the terms that bind them. Where a supplier does not act, the household's routes are back to the Ombudsman and, for matters within its remit, to Ofgem as the appointed regulator able to act on unfair price hikes and poor service²¹.

There is a parallel worth noting for households comparing routes. In the Renewable Heat Incentive, where a review request is refused, the escalation route is the Parliamentary and Health Service Ombudsman via an MP²⁹. That is a different scheme with a different escalation path, and it does not apply to heat network disputes, which sit with the Energy Ombudsman.

For a household's energy independence, the honest position is this: a heat network household buys heat rather than gas, cannot switch supplier, and depends on the operator for price, service and metering. The Ombudsman provides independent redress and a financial ceiling, but it does not create competition, does not set prices and cannot fine an operator. Regulation is moving toward Ofgem oversight with protections intended to match other heating types as the framework matures²², and until then the dispute route is the main lever available. Households wanting the wider picture of how heat networks are regulated, and where consumer protection sits within it, can read heat network regulation alongside the general energy complaints and redress framework.