Oil Boilers
OFTEC-registered oil boiler engineers. Service, repair, and installation across Watford, Hertfordshire and London. No call-out fee. 1-year parts guarantee.
OFTEC-registered oil boiler specialists
Pick the service that matches what you need. All carried out by OFTEC-registered engineers with 2026 pricing from Tony — no call-out fee, 1-year parts guarantee.
Oil Boiler Service
£120 – £180
+VAT annual service
Keeps your warranty valid. Combustion analyser, burner strip, new nozzle + filter, signed OFTEC service report.
Book a service →
Oil Boiler Repair
£150 – £500
+VAT diagnosis dependent
OFTEC engineer on site within 2 hours. Ignition, burner, nozzle, pump, flue, pressure sensor — all common faults covered.
Book a repair →
Oil Boiler Installation
£2,500 – £5,000+
+VAT * site conditions
Full install including safe removal of old boiler, commissioning, and manufacturer warranty registration.
Get a quote →
Oil boiler pricing — 2026
Standard call-out and travel included. Prices exclusive of VAT. OFTEC registered.
Call-out fee
FREE
Travel always included
All prices exclusive of VAT. Ranges reflect typical jobs. Final price quoted before any work begins.
How we work
Five steps. No surprises. No pressure.
Call or book
Phone answered within 20 minutes. Free quote form.
Engineer arrives
Gas Safe engineer on site within 2 hours.
Free diagnosis
We check, explain, and quote a fixed price.
Work done
Most jobs completed first visit — common parts on the van.
Guaranteed
1-year parts guarantee on everything we fit.
Where we service oil boilers
Oil boilers are common across rural Hertfordshire, Buckinghamshire, and the outer London fringe. We cover all our Tier 1 areas from Watford HQ — further afield quoted separately.
Primary service areas
Oil boiler FAQs
Are you OFTEC registered?
Yes. OFTEC is the governing body for oil heating in the UK — equivalent to Gas Safe for gas. All our oil work is carried out by OFTEC-registered engineers.
How often should an oil boiler be serviced?
Annually. OFTEC and every major oil boiler manufacturer require an annual service to keep warranty valid, efficiency high, and the appliance safe.
What brands do you work on?
All major UK oil boiler brands — Worcester Bosch Greenstar Heatslave, Grant Vortex, Firebird, Warmflow, Mistral, HRM, Trianco, Eco-Hometec and others.
Is there a call-out fee?
No. Standard call-out and travel always included.
Where do oil boilers make sense?
Rural properties without mains gas — common across Hertfordshire, Buckinghamshire, and the outer London fringe. We service and install oil boilers regularly across our service area.
Do you service oil tanks too?
We inspect the oil tank, supply lines, and fittings as part of the annual service. Full tank replacements are specialist work — we can quote or refer you as appropriate.
Oil boiler service, repair, or install?
Engineer on site within 2 hours. Phone answered within 20 minutes. No call-out fee.