Domestic gas and heating
Boiler Repairs in Woking
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- Gas Safe Registered
- G3 Unvented Certified
Understanding the breakdown
Similar symptoms can have different causes.
A boiler that stops, loses pressure or struggles to heat the home needs more than a guess at a replacement part. The appliance, controls and connected heating system all matter when working out what has gone wrong. For radiator, circulation or heating pipework problems, see our central heating repair service.
Our boiler repair service is part of our domestic gas and heating services. Share the symptoms and service history so we can discuss an assessment and the appropriate next steps. For planned maintenance rather than a breakdown, see our boiler servicing page.
Common boiler problems
Pressure loss, breakdowns and changes in operation.
- Boiler losing pressure
- Repeated pressure loss on a sealed heating system can involve leaks, discharge through a relief valve or an expansion vessel issue. The boiler and connected heating system need assessment; repeatedly topping up does not establish or resolve the cause.
- No heating or hot water
- Loss of heating, hot water or both can have different causes. Tell us whether the boiler runs, what the controls display and whether the problem affects the whole home. The fault may involve the boiler or the wider system.
- Ignition and control problems
- Failed ignition, repeated stopping or a thermostat that does not call for heat need diagnosis. Controls, sensors and other equipment may be involved; an error code is useful information, not proof that a particular component needs replacing.
- Leaks, noises and fault codes
- Report visible water, new banging or gurgling sounds and any code shown on the display. Do not remove covers, reach into the appliance or keep resetting it to reproduce the problem.
Electrical faults and controls
Assess the connections between the boiler and its controls.
A boiler electrical fault may concern the supply, thermostat, programmer, wiring or internal components. We investigate the symptoms before recommending work, with the appropriate competence and safety arrangements for gas and electrical systems.
Do not remove the casing, test wiring, bypass a safety device or repeatedly reset the appliance. If water is leaking near electrical equipment, keep clear and seek professional advice rather than touching the equipment or switches.
Gas safety comes first
If you smell gas or suspect a gas leak, leave the property and call the National Gas Emergency Service on 0800 111 999 from a safe place. Do not use electrical switches or naked flames, and do not wait for an enquiry-form reply.
Do not use an appliance you suspect is unsafe. Gas work needs a Gas Safe registered engineer qualified for the relevant work. See HSE's domestic gas safety guidance for further advice.
Diagnosis and repair
Understand the fault before agreeing the repair.
Share the symptoms
Tell us your postcode, boiler make and model if known, displayed codes and what has changed. Mention pressure loss, water leaks and previous repairs, using only information you can obtain without dismantling anything.
Investigate the cause
We assess the appliance and relevant parts of the heating system. Checks are guided by the symptoms and manufacturer information, with appropriate gas safety assessment and safe isolation where needed.
Discuss the findings and scope
We explain the identified fault, any further investigation and proposed repair. Parts availability and the condition of the equipment can affect the options. Agree the work and cost before proceeding.
Complete the agreed repair and checks
The agreed repair is followed by relevant safety and operational checks. We explain the work, any remaining concerns and documentation appropriate to the repair, along with any maintenance needs identified.
Scope and cost
What affects the repair quote?
- Investigation and access
- The symptoms, whether the fault is intermittent and access to the boiler or connected pipework affect the diagnostic work. Discuss how the assessment is charged when enquiring.
- Parts and repair scope
- The component, appliance model, parts availability and work needed influence the proposed repair. A fault code alone is not enough to give a reliable parts list or price.
- The wider heating system
- Leaks, controls or circulation issues may involve equipment beyond the boiler. The quote should identify the agreed scope and how any additional work will be discussed.
Repair or replacement?
An isolated fault in otherwise serviceable equipment is different from repeated breakdowns or unavailable parts. Discuss the diagnosed cause, condition and cost of the proposed repair before deciding. If a new system is appropriate, our boiler installation page explains assessment and replacement options.
For homes around Woking
We serve Woking and within five miles. Contact GU Services with your postcode and symptoms, or explore our wider residential services.
Tell us about your boiler fault
Include your postcode, boiler make and model if known, symptoms and any displayed code. Do not dismantle or test equipment to complete this form. If you smell gas or suspect a leak, use the National Gas Emergency Service number above.
07761 472337Before you enquire
Boiler repair questions
Why does my boiler keep losing pressure?
Possible causes include leaks, a relief valve discharging or an expansion vessel problem on a sealed system. Repeated loss needs investigation rather than continued topping up. Share the symptoms and any visible leaks without opening the boiler.
Why have I lost heating or hot water?
The cause depends on the appliance and system. Boiler components, controls or the wider heating installation may be involved. Tell us whether one or both functions are affected and note any displayed code so we can discuss an assessment.
Can an electrical fault stop a gas boiler working?
Yes. A boiler electrical fault may involve its supply, controls, wiring or internal components. Diagnosis needs the appropriate competence and safe isolation. Do not open the casing, bypass controls or attempt electrical repairs yourself.
Is boiler servicing the same as a repair?
No. A service is planned maintenance; a repair addresses a fault. If the boiler has broken down, leaks or repeatedly stops, describe that when enquiring so the right work can be discussed. A routine service should not be assumed to fix an existing fault.
Will you be able to repair the boiler on the first visit?
That depends on the fault, condition and any parts required. We cannot promise a first-visit repair before assessing the equipment. We discuss the findings and practical next steps with you.
How do I decide between boiler repair and replacement?
Consider the diagnosed fault, overall condition, earlier breakdowns, parts availability and the proposed work. Replacement is not automatic because a boiler is older or has stopped working. The assessment helps compare the options.
Where do you provide boiler repair services?
GU Services serves residential customers in Woking and within a five-mile radius. Include your postcode and boiler details when enquiring so we can confirm coverage and discuss the problem.
Mon - Sun: 24 Hours
Ready to get started or need immediate help?
Whether you need a quick quote for your next project or have an urgent issue that requires immediate attention, the GU Services team is here to help.