Boiler Repair Cost & How Long a New Install Actually Takes

Two questions come up constantly when a boiler starts playing up. What will a repair actually cost? And if it needs replacing instead, how long will you be without heating? Here are straight answers to both.

Boiler repair costs

These are realistic ranges for a straightforward, single-fault repair, including parts and labour. The exact cost depends on the part needed and how easy the boiler is to reach. We always diagnose the fault first. Then we confirm a fixed price before starting, rather than charging by the hour. This is the same whether it’s a farmhouse boiler near Dereham or a straightforward combi in the city.

How long a repair actually takes

Most repairs are sorted in a single visit, typically 1-3 hours once the fault is diagnosed. The exception is when a part isn’t something we carry on the van. Then it needs ordering in — we’ll tell you honestly at the diagnosis stage and book a follow-up visit as soon as it arrives.

When repair stops making sense

If your boiler is older and has needed more than one repair recently, read our guide on signs your boiler needs replacing. Sometimes “just another repair” is actually the start of a pattern. Several small repairs can add up to more than one straight swap. This is worth checking whether you’re in Norwich or in the older housing around Attleborough, since a string of small repairs on an ageing unit can cost more than a new boiler.

How long a new boiler installation takes

If replacement is the right call, here’s what to expect for timing:

• Like-for-like combi swap (same type, same location): 1 working day
• Combi relocated to a new spot, or output upgraded: 2 days
• Switching to a system boiler with a cylinder: 2-3 days

These figures assume reasonably accessible pipework, although older or unusual systems can add time. We’ll confirm exact timing at the survey stage, before you commit to anything.

Will you be without heating during the install?

Yes, for the duration of the work, since there’s no way around disconnecting the old boiler before the new one goes in. If you’re planning ahead, rather than facing an emergency, book installation in late summer or early autumn to avoid the coldest weeks. If it’s a genuine emergency in winter, we can talk through temporary heating options to bridge the gap.

What can extend either job beyond the estimate

A repair that looks straightforward sometimes reveals a second issue once the first is fixed. One common example is a pump replacement that uncovers sludge, which then needs a power flush to fully clear. For installations, older pipework, awkward access, or asbestos-era materials in very old properties can all add time. This is a real possibility in Attleborough’s pre-war housing as much as anywhere else. We flag anything like this as soon as we see it, with a clear cost before proceeding.

Getting a fixed price for either

Whether it’s a repair or a full replacement, we always survey or diagnose first. We then give a clear, fixed price before starting, never an open-ended hourly rate. This applies whether that’s in Norwich itself or a boiler out towards Wymondham. See our full new boiler cost guide for installation pricing, or book a boiler service and we’ll take a look.