Gas Safe 599015 · G3 · Vaillant · Viessmann · Glow-worm · RG40 / RG41
Expert Plumber & Heating Engineerin Wokingham
On time · on budget · done right
No heating? No hot water? Stuart's been repairing boilers and heating systems across Wokingham and RG40 for 20+ years. Fixed prices, exact arrival times — no call-out fees, no upselling.
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Gas Safe Reg. 599015Verify at gassaferegister.co.uk →
130+ five-star Google reviews from homeowners across Wokingham, Earley, Woodley and RG40
Services
Boiler repairs, servicing, new installs & more
Every job quoted upfront. Exact arrival times. No call-out fees. Stuart covers Wokingham and the whole RG40 / RG41 area.
Book a visit →Boiler Repairs & Diagnostics
Proper diagnostics — not guesswork. We identify the exact fault, give you a fixed price, and fix it. All makes: Vaillant, Viessmann, Worcester Bosch.
From £96 fixed price
Annual Boiler Servicing
Skip it and you void your warranty. Wokingham's hard water furs up heat exchangers faster than anywhere. One hour now beats a new boiler in January.
£96 fixed price
Find out more →Landlord CP12 Certificates
Legal requirement for landlords. Fixed price, same-day certificate issued wherever possible. Book online across Wokingham and RG40.
From £75
Find out more →Powerflush & System Cleanse
Cold spots at the bottom of radiators? Banging noises? That's magnetite sludge damaging your pump. A powerflush clears it for good.
From £550
Find out more →Smart Thermostat Installation
Hive, Nest, tado° — fitted properly. Stuart is the only Hive-trained engineer in Wokingham. Customers typically cut heating bills by 16% in year one.
From £300
Find out more →Water Softeners & Treatment
Wokingham water runs at 330–380 mg/L hardness — brutal on boilers and cylinders. A water softener pays for itself in extended boiler life and lower energy bills.
From £950 installed
Find out more →New Boiler — Sorted in a Day
An old boiler in Wokingham's hard water costs you every month. A modern Viessmann or Vaillant — sized with a full heat-loss calculation — cuts bills by up to 35% and comes with up to 12 years' warranty.
Get a fixed-price quote →Your local engineer
Meet Stuart Mundy — the engineer on every job
Stuart Mundy
Founder · Gas Safe Engineer
Gas Safe 599015 · Verified“I've been in boiler rooms across Wokingham for 20 years. I've seen the bodge jobs. I don't do them.”
Stuart started Thermotec because he was fed up with the industry norm — vague time slots, inflated bills, and repairs that didn't stick. Every job across Wokingham, Woodley, Earley and RG40 gets the same treatment: diagnosed properly, quoted honestly, fixed first time. Verify Gas Safe Reg. 599015 →
How we work
From your first call to a working boiler
No vague windows. No surprise invoices. No returning for the same fault twice. This is how every Thermotec job runs.
Book your slot →Pick your exact slot
Book online or call Stuart direct — no six-hour windows. Same-day emergency slots across Wokingham and RG40 wherever possible.
Price agreed before we start
Repairs start at £96 fixed diagnostic fee. Installations get a written quote covering parts, labour and certification — all in. What you're quoted is what you pay.
Stuart arrives on time
Not "sometime this morning." Stuart arrives at the booked time. The van is stocked with Vaillant, Viessmann and Worcester parts — most faults fixed first visit.
Tested, certified, guaranteed
Full system test. Gas tightness check. Digital Benchmark certificate emailed same day. 12-month workmanship guarantee on all installation work.
Why Thermotec
Why Wokingham homeowners keep calling us back
Exact arrival times — every job
Not a six-hour slot. Not "sometime this morning." Stuart tells you when he's arriving and he's there. If something changes, you hear first.
Price agreed before we start
No call-out fees at the bottom of the invoice. No "while I'm here" add-ons. You know the price. We stick to it. Done.
90% first-time fix rate
The van's stocked. The diagnostics are proper. Stuart's been doing this 20 years. Most faults don't need a return visit — because the job's done right.
Gas Safe, G3, Vaillant, Viessmann
Gas Safe 599015. G3 for unvented cylinders. Viessmann accredited. Vaillant Advance Partner. Fully insured. Everything you legally need — and more.
Boiler fault codes
Boiler fault code on the display? Here's what it means.
Most faults we see across Wokingham every week come down to the same codes and causes. We cover Vaillant, Viessmann, Worcester Bosch, Glow-worm and Baxi.
Get it fixed today →Not sure what your code means? Call Stuart on 07850 116944 — he'll tell you straight away whether it needs an engineer or if there's a simple fix you can do yourself.
Other common boiler faults in Wokingham
Boiler keeps losing pressure
Dropping below 1 bar — topping up every few weeks
There's a leak — a radiator valve, pump seal, or failing expansion vessel. Topping it up is not a fix. Stuart pressure-tests the system to find the source.
Diagnostic from £96
Rumbling or banging when the heating's on
Sounds like a kettle boiling — worse in winter
Limescale on the heat exchanger. Wokingham water runs at 330–380 mg/L — some of the hardest in the country. A descale or powerflush stops the damage.
From £96
Heating works — but no hot water
Combi running cold from the tap
Nine times out of ten it's a stuck diverter valve — classic Vaillant and Worcester Bosch combi fault. Stuart stocks the replacement valves for the most common models; usually a same-visit fix.
From £96 + parts
Radiators cold at the bottom
Hot at the top, cold below — room not warming
Magnetite sludge settled at the bottom. Bleeding won't shift it. You need a powerflush plus a system inhibitor to stop it returning within a year.
Powerflush from £550
Boiler keeps cutting out & locking off
Won't restart — keeps going to lockout
Could be a thermocouple, blocked condensate pipe, or a failing PCB. Frozen condensate is the number one January callout in Wokingham. Stuart unblocks it on the spot.
From £96
Emergency plumber in Wokingham
No heat, no hot water — needs fixing today
Stuart takes emergency calls across Wokingham, Woodley, Earley, Arborfield and RG40. Call direct for same-day availability. No emergency call-out premium — just the standard fixed price.
Smart thermostats
Hive, Nest or tado°? The honest comparison from a trained installer.
Stuart is the only Hive-trained engineer in Wokingham and installs all three brands. Most customers save 16% on heating bills in year one.
See installation prices →Water treatment
Water softener installation near Wokingham — why it matters here specifically
Wokingham sits in one of the UK's hardest water zones. Thames Water data consistently shows 330–380 mg/L calcium hardness — nearly double the national average of 200 mg/L. That limescale attacks your boiler, hot water cylinder, taps and appliances every single day.
A properly sized water softener pays for itself. Most customers see boiler service intervals extend, appliance lifespans increase by 3–5 years, and energy bills drop as heat exchangers stay clear of scale.
Get a free water softener quote →Wokingham water
UK average
appliance lifespan
fixed price
Your local Gas Safe engineer — 10 minutes from Wokingham town centre
Based in Arborfield, covering the whole RG40 and RG41 area. Same-day emergency slots available — call Stuart direct for breakdowns.
Plumbing & Heating Services Near You
Wokingham & RG40: Stuart covers the whole town — Norreys, Emmbrook, Cantley Park through to Woosehill and Barkham Road. Many 1960s and 70s properties still run original system boilers — often the smart move is a modern combi with a powerflush at the same time.
Earley, Woodley & Winnersh: Mostly newer builds with combis already fitted — Vaillant ecoTEC and Worcester Greenstar are the most common. As a Vaillant Advance Partner, Stuart can carry out warranty repairs and unlock extended 12-year cover.
Arborfield & Shinfield: Mix of period properties and new-build estates. Older homes often have unvented cylinders — G3 qualification is a legal requirement for this work, and Stuart holds it.
Customer reviews
What Wokingham homeowners say
130+ five-star Google reviews from homeowners, landlords and businesses across Wokingham and RG40.
“Thermotec handled our full boiler conversion to a high-efficiency combi perfectly. The house is much tidier and the hot water pressure is incredible. If you're looking for a boiler replacement in Wokingham, Stuart is the expert you need.”
Davin Fine
Wokingham
“Stuart performed a full 5-year manufacturer strip-down service. Meticulous, deep-cleaning internal components to ensure our Worcester Bosch warranty remains 100% valid. Truly the gold standard for heating engineers in Wokingham.”
Giana Ismael
Wokingham
“Professional, reliable and friendly. Stuart diagnosed the issue right away and carried out the work to a very high standard. Everything was explained clearly. I wouldn't hesitate to recommend Thermotec to anyone in Wokingham.”
Bradley Griffin
Wokingham · Local Guide
FAQ
Questions we get asked every week
Straight answers. Still unsure? Call Stuart directly.
Ask Stuart →Last updated:
How much does a boiler service cost in Wokingham?
Is Thermotec Gas Safe registered?
Do you cover Woodley, Earley and Finchampstead?
How long does a boiler service take?
What's the difference between a boiler service and a boiler repair?
Do I need a boiler service every year?
Boiler broken? Heating off?
Let's get it sorted today.
Fixed prices · Exact arrival times · Same-day where possible · 90% first-time fix
11 Hill Road, Arborfield, Berkshire RG2 9LP · info@thermo-tec.co.uk