How Much Does It Cost to Fix a Boiler?
Last updated: 4 September 2026
Quick Answer
Boiler repair costs typically range from £100-£500, depending on the issue and parts required.
Overview
Boiler repair costs can vary widely. This guide covers average boiler repair costs and when to call a professional.
Step-by-Step Fix
Safety & Preparation
Before beginning any repair, ensure you have isolated power or water supplies. Clear your workspace, gather standard hand tools, and wear appropriate personal protective equipment (PPE).
- Begin by carefully checking your boiler for any visible signs of a problem, such as leaks, unusual noises, or a complete lack of heating or hot water. If your boiler has a digital display, note down any error codes shown; consult your boiler's manual to understand what these codes signify. Always ensure the power supply to the boiler is off before inspecting any internal components for your safety.
- Determine if your boiler is still covered by a manufacturer's warranty or an extended home insurance policy before proceeding. Locate your original purchase documents or contact the manufacturer with your boiler's serial number to confirm its warranty status. If it's under warranty, the repair might be free, but you must use their approved technicians.
- Once you understand the potential issue, obtain at least three repair quotes from different Gas Safe registered engineers. You can find accredited professionals using the Gas Safe Register website, ensuring they are qualified to work on gas appliances. Always ask for a detailed breakdown of costs, including parts and labour, for transparency.
- Carefully compare the estimated repair cost against the price of purchasing and installing a new, energy-efficient boiler. If the repair cost is significant (e.g., more than 50% of a new boiler's price, or for an older, inefficient model), consider whether investing in a replacement would be more cost-effective in the long run. Factor in potential energy savings from a newer boiler as part of your decision.
- After selecting your preferred Gas Safe registered engineer and agreeing on the scope and cost of the repair, schedule a convenient time for them to attend. Ensure they provide a written quote and details of the work to be carried out before they begin. Once the repair is complete, ask for a service report and ensure you are completely satisfied with the work and that the boiler is functioning correctly.
Common Symptoms & Diagnostic Resolutions
Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.
| Symptom / Code | Likely Root Cause | Recommended Resolution |
|---|---|---|
| No heat | Faulty boiler | Call a Gas Safe engineer. |
Frequently Asked Questions
How much does a boiler service cost?
Typically £70-£120 for a standard service.
Is boiler cover worth it?
It can be if you have an older boiler.