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Boilers seem to have a habit of going on the blink at the worst of times, perhaps in the middle of a surprise spring snowstorm or just as the weather turns colder and you’re thinking about cranking up the heating. Whether you need a quick repair or a brand new boiler, the cost can land when you least expect it.
The good news is that you don’t always have to pay it all in one go. A loan for a new boiler lets you spread the cost over manageable monthly payments, so a broken boiler doesn’t have to mean a cold home. In this guide we look at how to finance a new boiler, what a repair or replacement typically costs, the help available if you have bad credit, and where to look for a grant.
Yes, you can. Plenty of people in the UK borrow to cover a new boiler rather than paying upfront, and there are several routes to choose from. A new combi boiler, fully fitted, typically costs between £1,800 and £3,500 in 2026, and more for a larger home or a premium model, according to UK cost guides. That is a big lump sum for most households to find all at once.
Borrowing simply means paying in instalments over time instead. You might use a personal or short-term loan, a plan from the installer or manufacturer, a credit card, or in some cases a government grant. Sunny is a broker, not a lender, so we don’t lend the money ourselves. Instead, we search a panel of FCA-authorised lenders to help you find short-term loan options that fit your situation, and we never charge you a fee for it.
There is no single right way to pay for a boiler. The best route depends on how much you need, your credit history and how quickly you want the work done. Here are the main choices to weigh up.
A loan gives you a fixed amount to repay over a set term, usually in equal monthly payments. It is one of the more flexible ways to pay for a repair or a new boiler, because you can use the money with any installer you choose. Rates and terms vary from lender to lender, so it pays to compare. As a broker, Sunny can help you look at short-term loans from £100 to £2,500 over 3 to 36 months. That suits repairs and smaller replacements well, and it can also top up money you already have towards a larger job.
Many boiler manufacturers and installation companies offer their own payment plans, often arranged at the point of sale. Some come with interest-free periods, others spread payments over a few years. These can be convenient, but read the terms closely. Check what the interest rate becomes once any interest-free period ends, and whether there is a charge for paying early.
If you have a credit card with a 0% purchase period, it can be a tidy short-term option, as long as you can clear the balance before the interest-free window closes. After that, card interest can be high, so have a repayment plan in mind. Not every installer accepts cards, so check first.
Some installers let you have the boiler fitted now and defer payment for a set time. If you clear the balance within the interest-free period, it can work out well. If you don’t, the interest that kicks in afterwards can make the boiler far more expensive, so be realistic about what you can comfortably repay.

A patchy credit history doesn’t automatically rule you out of a loan for a new boiler. Some lenders look at your wider circumstances, such as your income and how you manage money now, rather than your credit score alone. Nothing is guaranteed, and approval is always the lender’s decision, but it is worth checking rather than assuming the answer is no.
A few things can help when your credit isn’t perfect:
If your credit record is a worry, our guide to bad credit loans explains how it works and what lenders tend to look at. When you check your options through Sunny, the first step is a soft search, so it won’t leave a mark on your credit file or affect your score. We also help people who have been turned down elsewhere, including through our bad credit payday loans options.
We know an unexpected boiler bill can throw a household off balance, and we are here to make finding a solution as straightforward as possible. Sunny is a credit broker, not a lender. We search a panel of FCA-authorised lenders to help you find short-term loan options that suit you, and we process thousands of no-obligation quotes every day.
What that means for you is simple. There are no fees from us, ever, and the first check is a soft search that won’t affect your credit score. If you are approved and accept an offer, funds could reach your account quickly, so a repair need not wait. We can help with amounts from £100 to £2,500, repayable over 3 to 36 months, which works well for repairs and as a contribution towards a new boiler. If speed is your main concern, our quick loans are built for exactly that.
Get a no-obligation quote to see what you could be eligible for, with no pressure to accept.
Warning: Late repayment can cause you serious money problems. For help, go to moneyhelper.org.uk
There’s a lot to factor in when it comes to a boiler repair. Most repairs come in somewhere between £150 and £500 including parts and labour, with the UK average sitting around £300, though a complex fault can cost more and an emergency call out often lands between £225 and £675, according to the Checkatrade cost guide. Gas engineers typically charge £50 to £100 an hour, plus a call-out fee of around £60 to £100. There is usually an extra charge for emergency or out-of-hours work.
Broken boilers really need expert help. You should look for someone who is Gas Safe registered. This is the official body that makes sure only competent, qualified engineers and plumbers carry out gas safety work, such as fixing boilers.
Here we highlight some of the most common boiler problems that you may need professional help with, and the typical 2026 cost of each, including parts and labour. Prices vary by region and by the make and age of your boiler, so treat these as a guide rather than an exact quote.
| Boiler part | What has gone wrong? | Typical 2026 cost (parts and labour) |
|---|---|---|
| Printed circuit board | The boiler’s brain. Error messages and faults often mean it needs replacing. | £250 to £450 |
| Water pump | Pushes hot water to your radiators. If it fails, your home won’t heat up. | £200 to £400 |
| Ignition | Lights the flame that heats your water. If it fails, you lose heating and hot water. | £100 to £250 |
| Thermocouple | A safety part that shuts off the gas if the pilot light goes out. Fix promptly. | £90 to £200 |
| Pressure relief valve | Regulates boiler pressure. Sudden rises or drops can be unsafe, so fix quickly. | £120 to £250 |
| Heat exchanger | The priciest part to replace. On an older boiler, failure often means a full replacement. | £400 to £650 or more |
| New boiler | When a repair isn’t worth it, you need a full replacement. | £1,800 to £3,500 fitted |
There are a number of ways to fund a boiler repair if you don’t have the cash in your main account. Here are some options:

To avoid the stress of a broken boiler in future, there are steps you can take to keep it running efficiently and reduce the chance of paying out for a repair.
It’s recommended that you get your boiler serviced regularly by a Gas Safe registered engineer to keep it running as efficiently as possible, and to pick up on any potential issues before they become a big deal. A routine service costs around £80 to £150 but could pay for itself over time, as it reduces the risk of larger parts breaking and causing costly repairs later.
If a service identifies an underlying fault, you’ll need to consider how and when you get it repaired. If it isn’t an emergency, you can compare quotes and arrange for an engineer to come at a convenient time. You’ll also have time to work out how to cover the costs and apply for a loan if you need to. Sunny can support you whatever boiler repair you face, with short-term loans repayable over 3 to 36 months.
While turning your heating on during a summer heatwave doesn’t seem logical, it’s worth switching it on briefly throughout the year to keep the boiler ticking over. Leaving it off for months and then cranking up the thermostat at the first cold spell can make your boiler work harder, straining its mechanisms and potentially leading to something breaking.
Check your radiators are warm from top to bottom. Cold spots suggest they need bleeding, which means releasing air that’s become trapped inside. You can do this yourself with a radiator key from a DIY store. Regularly bleeding your radiators keeps the system running properly and avoids straining the boiler as it tries to push water through pockets of air.
You can check your boiler pressure yourself by looking at the gauge on the front. For a correctly pressurised boiler it should read between one and two bars. If it’s too low or too high, you may be able to fix it by resetting the pressure. Check your boiler’s manual or look online for a step by step guide for your particular model. If you’re not sure, or the pressure keeps changing even after you’ve reset it, call a Gas Safe registered engineer.
Representative example: Amount of credit: £1,000 for 18 months at £102.42 per month. Total amount repayable of £1,843.60. Interest: £843.60. Interest rate: 89% pa (fixed). Representative 89% APR. Rates between 9.3% APR and 1721% APR. Your no-obligation quote and APR will be based on your personal circumstances. Individuals with a good credit score may have access to cheaper interest rates. Interest rates associated with short-term loans tend to be higher than those of traditional personal loans. Loan term lengths from 3 to 36 months. Subject to lender’s requirements and approval.
Warning: Late repayment can cause you serious money problems. For help, go to www.moneyhelper.org.uk.
If a new boiler feels out of reach, you have more options than you might think. Start by getting a couple of quotes, as prices vary between installers. Ask whether a repair could safely keep your current boiler going for now. Check whether you qualify for a grant such as ECO4. And if you decide to spread the cost, compare loans and payment plans to find repayments you can comfortably manage. If money worries are mounting, free and independent help is available from MoneyHelper.
There might be. The main one is the government-backed Energy Company Obligation scheme (ECO4), aimed at low-income and vulnerable households. If you receive certain benefits and your home has an older, inefficient boiler, you could qualify for a free or subsidised replacement. There is also the Boiler Upgrade Scheme, which gives £7,500 towards a heat pump if you are switching away from gas. Eligibility depends on your circumstances and property, and schemes change, so check the current rules on GOV.UK or with your energy supplier.
For a straightforward like-for-like swap, the labour to fit a new boiler usually costs around £500 to £1,000, and the job typically takes a day. Gas Safe engineers often charge a day rate of roughly £300 to £600. A more involved job, such as changing your system type or moving the boiler to a new spot, takes longer and costs more. Always get a few itemised quotes so you can compare like for like.
Checking your options through Sunny starts with a soft search, which doesn’t leave a mark on your credit file. A hard search, the kind that can show up, only happens if you accept an offer from a lender and formally apply. So you can look before you leap.
Through Sunny you can look at short-term loans from £100 to £2,500. That comfortably covers most repairs and can go towards a new boiler. If you need a larger sum for a full replacement, you may want to combine it with savings or look at a longer-term plan from the installer.
Take a look at our other guides on short-term loans for home repairs and those everyday life emergencies.