In the world of renewable heating, trust sits on a three-legged stool: homeowners, installers and manufacturers. When any one of those legs weakens (or starts wobbling) everyone feels it. And nothing tests trust more than warranties. Who sets them, who decides their length, who benefits from shortening them and who ultimately pays when things go wrong.

A couple of weeks ago, I received a piece of promotional marketing circulating among installers. It wasn’t a homeowner-facing email. It wasn’t a consumer guide. It was a manufacturer-to-installer incentive, and the reaction from the installer who sent it to me was one word: appalled.

The promotion in question sets out three warranty options for installers registering a heat pump: two years, five years or seven.

What is unusual is the way this choice is financially weighted. Registering a two-year warranty earns the installer £300 cashback and a sizeable haul of loyalty points. Choosing five years earns a reduced sum: £120 and fewer points. Selecting the full seven years (the maximum warranty publicly quoted by the manufacturer) earns nothing at all.

The implication is not subtle. The manufacturer appears to be ascribing a monetary value to the removal of warranty cover and is offering that money directly to the installer. The shorter the warranty given to the homeowner, the more the installer stands to gain. It is a simple equation with complicated consequences.

What makes this structure particularly sensitive is that warranty registration is rarely a transparent process. Many homeowners assume the installer merely “activates” whatever warranty the manufacturer provides as standard. Few realise the installer may have discretion over the warranty length. Fewer still realise this discretion can carry a financial incentive.

On paper, there is nothing unlawful about a manufacturer offering commercial incentives to installers. But the moment that incentive results in a homeowner unknowingly receiving a materially shorter warranty than the one publicly associated with the product, the situation begins to move towards what consumer law defines as a misleading omission.

As I understand it, under UK consumer protection regulations, failing to disclose information that would affect a homeowner’s purchasing decision, such as the fact that a longer warranty exists and has been deliberately withheld in exchange for a cashback payment, can amount to a breach even if no explicit false claim is made. If an installer were to openly explain the incentive to the homeowner, and the homeowner knowingly chose the reduced warranty, the legal position becomes less clear-cut, though still ethically questionable.

It appears that the incentive is designed to sit between manufacturer and installer, not between installer and customer. That lack of transparency, the fact that the consumer may never realise their warranty was truncated for someone else’s financial benefit, is precisely what elevates this from a marketing oddity to a potential consumer-rights issue. It’s the silence, not the cashback, that creates the legal risk.

Adding a final layer of irony, Ideal’s own LinkedIn page is currently fronted by a banner proudly declaring: “A warranty that’s more than paperwork.” It’s difficult to square that public message with an incentive scheme that financially rewards installers for potentially offering homeowners less warranty cover. The contrast is stark: a slogan about trust and protection on one hand, and a behind-the-scenes promotion that appears to place a cash value on reducing that very protection on the other. Whatever the intent, the optics are undeniably jarring, and they might as well have said, “A warranty that’s more than paperwork… it’s negotiable for cash.”

So on a recent podcast, I asked Patrick Wheeler and Barry Sharp whether they had encountered structures like this before and what it means for homeowners.

Patrick noted that manufacturers have long treated warranties as costed financial products. In the boiler market, extended warranties are buyable commodities and installers can pay to upgrade customers to longer cover. That, he said, is not inherently problematic. What is problematic is asymmetry of information.

A homeowner assumes the installer is registering the warranty in their best interest. The installer, meanwhile, may be weighing two competing pressures: what protects the customer and what benefits the business. Patrick called this “a conflict built into the transaction” one that places ethical installers in an impossible position and opens the door for less scrupulous ones to profit at the customer’s expense.

Barry pointed out that many warranty claims stem not from product faults but from poor installation. Incorrect pipe sizing, poor water quality, bad commissioning and inadequate controls account for a significant portion of issues. Manufacturers, he noted, often end up covering the cost of installer errors, so it is not hard to see why a manufacturer might quietly prefer a shorter warranty.

This is why, Barry said, transparency must be non-negotiable. If a manufacturer offers multiple warranty options, the homeowner must be part of that decision, not an incidental participant in a commercial incentive.

After receiving the promotion, I contacted a broad group of installers across the country and asked a hypothetical version of the same question: If a manufacturer offered you £300 to register a shorter homeowner warranty, would you take it?

I expected a mixed response. Some discomfort. Some pragmatism. Perhaps even a few who would justify the incentive on commercial grounds.

What I received was unanimity.

Every installer (from sole traders to multi-team businesses) said they would select the longest warranty available. Not one indicated they would reduce a customer’s cover in exchange for cashback. Not one viewed the incentive as appropriate. And not one believed the scheme was in a homeowner’s interest.

Several told me that the longer warranty is a critical selling point. In a competitive market, extended warranties differentiate installers and build trust. Offering a shorter warranty, even with a financial incentive, would undermine that trust before the system was even commissioned.

Others raised concerns about reputation. If an installer takes £300 to reduce warranty cover and a customer later discovers that their neighbour received seven years for free, the damage is irreparable. “My brand is worth more than any cashback,” one installer told me.

Some highlighted a broader cultural issue. Incentivising shorter warranties shifts the industry’s priorities away from engineering and towards margins. One installer described it as “a slippery slope”, recalling boiler manufacturers that attempted to incentivise sales with holidays and non-cash perks. “This isn’t the mindset the heat pump industry needs,” he said. “If you start paying people to reduce warranties, you undermine the core selling point of renewable heating: long-term reliability.”

Interestingly, a minority acknowledged that installers already receive incentives from some manufacturers, but all insisted they ignored them. “We use the most reliable products, not the most lucrative incentives,” one wrote. Another said his company receives no incentives for around 65% of its installations, yet still seeks the maximum warranty because that is what customers expect and deserve.

The most striking pattern, however, was this: while installers rejected the idea of choosing shorter warranties for money, very few said they would disclose such a scheme if it existed and believed it would confuse customers. Which means the homeowner could still be left in the dark.

A Fragile Trust at Risk

Trust in heat pumps is fragile. Homeowners are still learning what they are, how they work and how they will be supported over the long term. Warranties are central to that confidence. When manufacturers introduce incentives that reward the withholding of protection, the consequences extend far beyond one product or one brand.

The entire industry suffers.

For that reason alone, incentives tied to reduced warranty lengths demand scrutiny. If a homeowner can receive seven years of protection but is given two because it enriches the installer, the relationship between consumer, installer and manufacturer has failed at its most basic level.

This story is still unfolding. Ideal Heating was invited to comment and given a deadline to respond. That deadline has passed without any acknowledgement. If Ideal provides a statement, we will add it below in the interest of transparency.

In the meantime, homeowners should check their warranty documentation carefully. If your brand publicly offers up to seven years and your paperwork states otherwise, ask your installer why. It may be a simple registration error. Or it may be something else, something you were never told about.

If you have been affected by warranty issues on your heat pump, or if you are an installer who has encountered similar schemes, you can leave a comment or contact me confidentially (editor@renewableheatinghub.co.uk). Transparency is the foundation on which this industry must build. Anything less, and all three legs of the stool begin to wobble.