Siemens LMO14/24 Oil Burner Control
Siemens LMO14/24 Oil Burner Control 8 flashes: Red LED: 8 flashes
The burner locks out because the oil preheater failed to reach its cutoff temperature within ten minutes.
Safety first. This code involves a burner or safety lockout. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
- Code
- 8 flashes
- Name
- Red LED: 8 flashes
- Controller
- Siemens LMO14/24 Oil Burner Control
- Type
- Sensor fault
- What it does
- Lockout: the control shuts down and stays off until it is reset
- Risk
- RED Specialist territory
- Reset
- Needs a manual reset
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated July 23, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- Which manufacturer manual it comes from, linked
- The 3 common causes listed for this code
- The step by step check for this problem, one check at a time
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Siemens LMO14/24 Oil Burner Control 8 flashes mean?
The burner locks out because the oil preheater failed to reach its cutoff temperature within ten minutes.
Is Siemens LMO14/24 Oil Burner Control 8 flashes dangerous?
It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.
How do I fix Siemens LMO14/24 Oil Burner Control 8 flashes?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other Siemens LMO14/24 Oil Burner Control codes
2 flashes · Red LED: 2 flashes4 flashes · Red LED: 4 flashes7 flashes · Red LED: 7 flashes10 flashes · Red LED: 10 flashes
All 5 Siemens LMO14/24 Oil Burner Control codes · Every fault code