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Boiler servicing across Wokingham · RG40 · Earley · Woodley · Finchampstead · Arborfield · Winnersh
Vaillant Advance Partner · Viessmann Accredited · Gas Safe 599015 · RG40

Expert Boiler Servicingin Wokingham

£96 fixed price · Manufacturer-standard · Warranty protection · Benchmark record · Gas Safe 599015

Don’t wait for a winter breakdown. Thermotec provides manufacturer-standard boiler servicing across Wokingham and RG40 — not just a basic check. Every service includes flue gas analysis, inhibitor concentration check for Wokingham’s hard water, magnetic filter clean and digital Benchmark record to protect your warranty.

Service prices — fixed price
No hidden extras · Wokingham & RG40
Standard boiler service£96
Service + CP12 (landlords)£150
Viessmann 5-year strip-downPOA
25-point new home inspectionPOA
120+ five-star reviews · Vaillant Advance Partner · Viessmann Accredited · Gas Safe 599015 · G3 Qualified
✓ Vaillant Advance Partner✓ Viessmann Accredited✓ Gas Safe 599015✓ G3 Qualified

What’s included in your Wokingham boiler service

Thermotec provides a manufacturer-standard service — not just a basic check. Every service across Wokingham and RG40 includes a full 25-point inspection, and as a Vaillant Advance Partner and Viessmann accredited installer, the work meets the exact specification required to keep your extended warranty valid.

Full case-off internal inspection of heat exchanger and hydraulic blocks
Gas pressure and flow rate test — dynamic and static
Gas tightness test across all connections
Burner assembly inspection and cleaning
Ignition electrode inspection and gap check
Flue gas analysis — combustion efficiency and CO check
Flue and ventilation integrity check
Expansion vessel pressure test and re-pressurisation
Safety device function tests — overheat, pressure relief
System pressure check and top-up if needed
Magnetic filter clean and check — essential in Wokingham’s hard water
Inhibitor concentration check — critical in 330–380 mg/L hard water area
Visual pipework and connections inspection
Digital Benchmark service record — warranty protection
Why Wokingham boilers need more than a basic annual service: At 330–380 mg/L hardness, Wokingham’s chalk water depletes inhibitor faster than in soft water areas and creates magnetite sludge more quickly. Stuart checks inhibitor concentration with a test kit at every service — and in Wokingham homes, the inhibitor is often significantly depleted after just one year. The magnetic filter is also cleaned at every service. Without these two checks, the service does not adequately protect a system in RG40. Magnetic filter details →  |  Water softeners →

7 warning signs your boiler needs attention

Don’t ignore these — small faults lead to expensive failures
  • Unusual noises (kettling or banging) — limescale on the heat exchanger, common in Wokingham’s hard water area
  • Yellow or orange flame — incomplete combustion, potential carbon monoxide risk. Call immediately
  • Frequent pressure drops — failing expansion vessel or hidden leak introducing oxygen and causing internal rust
  • Lukewarm water or cold radiators — sludge restricting flow, forcing the burner to overwork
  • Visible leaks or moisture — a small drip today can short-circuit the PCB tomorrow
  • Unexplained energy bill increases — dirty burner or scaled heat exchanger burning more gas for the same heat
  • Unusual smells — rotten egg indicates gas; metallic smell indicates electrical overheating. Turn off immediately

Vaillant and Viessmann warranty servicing — accredited installer

As a Vaillant Advance Partner and Viessmann accredited installer, Thermotec provides manufacturer-standard servicing that keeps extended warranties valid. This is critical — Vaillant and Viessmann extended warranties (up to 12 and 15 years respectively) require annual servicing by an accredited installer. Servicing by a non-accredited engineer can invalidate the warranty.

Every Vaillant and Viessmann service is completed to manufacturer specification and a digital Benchmark service record is provided immediately after the visit.

Viessmann 5-year strip-down service: Viessmann requires a deeper strip-down service at the 5-year interval — removing internal components including the burner and heat exchanger for thorough cleaning. Stuart will confirm whether your Viessmann boiler is due this service when you book.

Landlord boiler servicing and CP12 certificates

Landlords are legally required to have an annual gas safety check on all rental properties. Thermotec combines an annual boiler service with a CP12 Gas Safety Certificate in a single visit for £150 — saving the cost of a second call-out. The CP12 is issued immediately after the visit.

Stuart covers properties across Wokingham, Earley, Woodley, Finchampstead, Arborfield, Bracknell and all RG40 and RG41 postcodes. For landlords with multiple properties, call to discuss a schedule. CP12 certificate details →

Frequently asked questions

How much does a boiler service cost in Wokingham?
A standard annual boiler service with Thermotec costs £96 fixed price — no hidden extras. Landlords can combine a service and CP12 gas safety certificate in a single visit for £150. Call 07850 116944 or book online 24/7.
Why does Wokingham's hard water make annual servicing more important?
At 330–380 mg/L, Wokingham’s chalk water depletes system inhibitor faster than in soft water areas, and creates magnetite sludge more quickly. An annual service is the only way to check inhibitor concentration is still protecting the system and clean the magnetic filter before sludge builds up enough to cause damage. Stuart checks both as standard on every Wokingham service.
Does annual servicing protect my Vaillant or Viessmann warranty?
Yes — both Vaillant and Viessmann require annual servicing by an accredited installer to maintain their extended warranty. As a Vaillant Advance Partner and Viessmann accredited installer, Thermotec provides manufacturer-standard servicing that keeps these warranties fully valid. A digital Benchmark service record is provided after every service.
Can I combine a boiler service with a CP12 landlord certificate?
Yes — Thermotec carries out boiler services and CP12 gas safety certificates in a single visit for £150, saving landlords the cost of a second call-out. The CP12 is issued immediately after the visit. Call 07850 116944 or book online.
What is the Viessmann 5-year strip-down service?
As a Viessmann accredited installer, Thermotec carries out the manufacturer-required 5-year deep strip-down service on Viessmann boilers. This involves removing internal components including the burner and heat exchanger for thorough cleaning — going beyond a standard annual service. It is required by Viessmann to maintain the full warranty at the 5-year interval. Stuart will confirm whether your boiler is due this service when you book.
Wokingham & RG40 · Vaillant Advance Partner · Gas Safe 599015

Annual boiler service in Wokingham
£96 fixed price, book your exact time

£96 fixed · Manufacturer-standard · Warranty protection · Benchmark record · Gas Safe 599015