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Problem Guides

Oil Boilers

Oil boiler problems, fault codes, running out of oil, and OFTEC engineer guides

1 free DIY guide · 10 total

All guides
AGA & Rayburn Oil Appliance Problems — Faults & What to Do
AGA or Rayburn oil-fired range cooker not working or losing heat· 1–4 hrs
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Grant Vortex Oil Boiler Problems — Faults & Fixes
Grant Vortex Pro or Condensing not working — lockouts and common faults· 30 min–2 hrs
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Ideal Isar HE & Classic Oil Boiler Problems — Faults & Fixes
Ideal oil boiler not working — lockouts, fault codes and common issues· 30 min–2 hrs
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Oil Boiler Annual Service — What's Involved and Why It's ImportantFree
What happens during an oil boiler service and how often is it needed· 1–2 hrs
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Oil Boiler Making Loud Noise — Causes & Fixes
Rumbling, pulsing, vibrating or banging from the oil boiler· 1–2 hrs
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Oil Boiler Not Working — Common Causes & Fixes
Oil boiler has stopped working or won't start — where to begin· 30 min–3 hrs
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Oil Boiler Puffing Smoke or Smell of Oil — What to Do
Smoke, sooty marks, or oil smell around the boiler or flue· 1–3 hrs
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Oil Boiler Run Out of Oil — How to Restart It
Tank is empty or very low — how to bleed the system and get it running again· 1–3 hrs
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Oil Tank Problems — Leaks, Low Level Alarms & What to Check
Issues with your domestic oil tank — leaks, gauge faults, contamination· 30 min
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Worcester Bosch Greenstar Heatslave Oil Boiler Problems
Heatslave II not working, locking out, or showing fault codes· 30 min–2 hrs
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