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Water Heater Repair

Hot water cylinder and unvented cylinder repair and replacement.

Call-out Fee
£75
Hourly Rate
£60/hr
Typical Job
£850
Service Area
All UK

* Estimates only, not a quote — typical figures from recent jobs. Your engineer confirms the exact price before any work starts.

Cold showers and tepid taps are usually a simpler fault than they feel — a failed element, a stuck thermostat or an airlock, not a new system. Our matched engineers diagnose the actual cause and fix it, often in a single visit.

Tell us what type of heater you have and what it's doing — the right answers send the right engineer with the right parts.

Common causes

  • Failed immersion elements (the classic 'no hot water' on electric)
  • Stuck or failed thermostats
  • Airlocks in the hot water pipework
  • Sediment buildup in cylinders
  • Failed pressure relief valves on unvented systems

What's involved

1

Diagnosis: element, thermostat, immersion timer, cylinder and supply checked.

2

Repair: element and thermostat swaps, immersion switches, airlock clearing.

3

Cylinder work: unvented cylinder repairs by G3-qualified engineers only.

4

Safety checks: pressure relief and expansion vessels verified before leaving.

Prevention — stop it happening again

Know your switch

Understand your immersion timer and boost switch — half of 'no hot water' calls are a mystery switch.

Flush yearly

Draining a few litres from the cylinder yearly keeps sediment from killing elements.

Test the relief valve

Lift and reseat the pressure relief valve occasionally so it doesn't seize.

Insulate the tank

A £20 jacket on an uninsulated cylinder pays for itself in a season.

For landlords

Landlords: your repair duties

As a landlord you must keep the property's water, heating, sanitary and drainage systems in good working order and fix them promptly when they fail. You're responsible for structural repairs, the boiler and heating system, plumbing and electrics. Tenants should report faults in writing — and you should respond fast, because a small leak left unattended becomes a big claim.

Landlords: legionella duty

Under the Health and Safety at Work Act and L8 guidance, landlords must assess and control the risk of Legionella — typically by ensuring water systems are properly maintained, flushing little-used outlets, and keeping records. Showers, dead legs and cold-water tanks are the usual hotspots. Your engineer can advise on a simple written risk assessment.

Official contacts

The official bodies that can help, report to, or check on — free and independent.

Local Authority Building Control (LABC)

Oversees compliance with Building Regulations — relevant for boiler replacements, bathroom works with drainage changes, and electrical work (Part P).

Citizens Advice

Free, independent advice on landlord disputes, repair rights and consumer issues.

Frequently asked questions

Water Heater Repair — fixed quotes from verified local engineers

Submit the form once, get matched to engineers in your area, and compare fixed quotes. It takes two minutes.

Water Heater Repair Across the UK