If you’re booking your annual boiler service, it’s natural to wonder how long your engineer will be in your home. Most homeowners want reassurance that:
- they won’t be without heating and hot water all day
- the appointment won’t disrupt their work or plans
- the service is thorough, not rushed
At Home Exeter, we carry out gas and oil boiler servicing across Exeter and the surrounding areas. Here’s what you can expect — and how to help your engineer complete your service smoothly.
How Long Does a Boiler Service Take?
A standard boiler service usually takes:
30 to 60 minutes for gas boilers
60 to 90 minutes for oil boilers
This assumes the boiler is in reasonable condition and serviced regularly. Older boilers or neglected systems can take longer.
If any issues or worn parts are found, your engineer should explain the extra time and cost before continuing.
→ Book your boiler service with Home Exeter
Why Do Oil Boilers Take Longer?
Oil boilers produce more soot and residue during combustion than gas boilers. During a service, our OFTEC engineers will:
- clean the combustion chamber and baffles
- replace the oil nozzle
- inspect and clean the burner
- check or replace the oil filter
- measure the efficiency with a flue analyser
This deeper cleaning helps oil boilers run more efficiently and use less fuel — especially important for rural homes not connected to mains gas.
What Happens During a Boiler Service?
A professional service isn’t just a quick inspection. Your engineer should complete a detailed set of checks to make sure your boiler is safe and efficient.
Here’s a typical checklist:
| Service Step | What the Engineer Checks/Does |
|---|---|
| Visual inspection | Signs of leaks, corrosion, soot, damage |
| Control check | Thermostats, safety devices and system response |
| Internal component inspection | Burner, seals, fans, heat exchanger |
| Gas pressure/flow test | Ensures safe and correct combustion |
| Flue and ventilation check | Checks for safe evacuation of gases |
| Combustion analysis | Measures CO levels and efficiency |
| Cleaning | Internal parts cleaned to maximise performance |
| Condensate trap cleaning | Prevents blockages and breakdowns |
| Service record issued | Proof of service, warranty and legal compliance |
This level of detail is what keeps boilers running safely for years.
→ See what’s included in your service
How Long Does It Take If a Fault Is Found?
Sometimes, during a service, your engineer may find a fault that needs repair. In these cases:
- small fixes (e.g. cleaning sensors, replacing seals) may be done immediately
- larger repairs may require a follow-up visit and parts ordering
Common issues that can extend service time include:
- heavily clogged heat exchangers
- faulty pressure relief valves
- deteriorated seals
- fan or burner faults
- sludge in the system
Preventing these issues is one of the biggest benefits of annual servicing — repairs are usually cheaper and caught early.
How to Prepare for a Boiler Service (Takes 5 Minutes)
Your appointment will run more smoothly if you:
✔ Make sure the engineer can reach the boiler easily
✔ Clear any objects around cupboards, storage spaces or loft areas
✔ Keep pets away during the appointment
✔ Check you know where your gas metre or oil tank switch is (just in case)
✔ Ensure someone 18+ is home if access is required
Most customers only need to tidy a small area or move a few items.
Does the Service Take Longer for Older Boilers?
Yes — older boilers may take more time due to:
- outdated parts that need careful handling
- heavy carbon build-up
- lower efficiency due to wear
- discontinued parts requiring sourcing
Some very old boilers may even be unsafe to use. If that’s the case, your engineer should advise you — not pressure you. At Home Exeter, we always offer a choice between repair and replacement where possible.
→ Get honest advice from our engineers
FAQs: Boiler Service Length & Appointments
Do I need to be home for the whole appointment?
Yes. Engineers cannot legally work without access, and you may need to approve repairs.
Will my heating and hot water be off during the service?
Yes, but only while we’re working — usually less than an hour.
Can a boiler service fix existing issues?
Minor issues may be fixed on the spot. Major faults may require a separate repair booking.
Can a boiler service be done during winter?
Yes, although engineers tend to be busier. Booking early is recommended.
Do landlords need a different type of service?
Landlords must have an annual Gas Safety Check. We can complete this alongside a standard boiler service.
Do you need service history for a boiler service?
It helps, but it’s not essential. Engineers can still complete a full, safe service without records.
Book Your Boiler Service in Exeter
A regular boiler service helps you:
- avoid unexpected breakdowns
- reduce your heating bills
- keep your home safe
- protect your warranty
- extend your boiler’s lifespan
At Home Exeter, all servicing is carried out by Gas Safe (and OFTEC for oil) engineers with clear pricing and no hidden extras.
→ Click here to book your boiler service
Fast, professional, local service —
and you’ll be back to heating and hot water in under an hour.
