Oil boilers are reliable when serviced regularly, but problems can still happen. Some issues are simple, while others need a qualified heating engineer.
If your boiler is not working properly, avoid taking it apart yourself. Check the basics first, then get professional help if needed.
Boiler Will Not Start
If your oil boiler will not start, check:
- The heating controls are switched on
- The thermostat is set high enough
- The programmer or timer is working
- There is oil in the tank
- The boiler has power
- The reset button has not tripped
Do not keep pressing the reset button. If the boiler does not restart after one attempt, contact an engineer.
No Heating or Hot Water
If you have no heating or hot water, the cause may be:
- Low or empty oil tank
- Faulty thermostat
- Air in the system
- Boiler pressure issue
- Burner fault
- Blocked fuel line
- Electrical fault
Check your oil level first. If the tank is empty, you may need a delivery and an engineer to restart the system.
Boiler Keeps Locking Out
A boiler lockout means the system has shut down for safety.
This can be caused by:
- Lack of fuel
- Air in the fuel line
- Dirty burner
- Faulty ignition
- Blocked filter
- Poor combustion
- Component failure
Repeated lockouts should always be checked by a qualified engineer.
Strange Noises
Unusual boiler noises may suggest a problem.
Common noises include:
- Banging
- Whistling
- Gurgling
- Rumbling
- Clicking
These may be caused by air, pressure issues, pump problems or internal faults.
Oil Smells
A strong oil smell may suggest a leak, spill or boiler issue.
If you smell oil:
- Turn off the heating if safe
- Ventilate the area
- Keep children and pets away
- Do not use naked flames nearby
- Contact a qualified professional
How to Avoid Boiler Problems
You can reduce boiler issues by:
- Servicing your boiler once a year
- Checking your oil level regularly
- Keeping the tank in good condition
- Ordering before you run out
- Reporting oil smells or leaks quickly
Need Heating Oil?
Barton Petroleum can arrange heating oil deliveries and help you keep your home supplied throughout the year.