Burner controls, ignition and flame safeguards
Satronic / Honeywell DKO 970/972 Oil Burner Control fault codes
What all 5 Satronic / Honeywell DKO 970/972 Oil Burner Control fault codes mean, in plain words, with a risk grade for each. These come from the manufacturer's own manual. The fix for each one is in WERCS Diagnose.
Get the fixes · plans from $49/moUpdated July 23, 2026
| Code | What it means | Risk |
|---|---|---|
| 1 short + 1 long flash | Flash-Code: 1 short then 1 long pulse (internal fuse defect) The oil burner control locks out due to an internal fuse or control box defect. | YELLOW |
| 1 short + 2 long flashes | Flash-Code: 1 short then 2 long pulses (low mains voltage) The mains voltage dropped too low, causing the burner control box to lock out until voltage recovers. | GREEN |
| 1 short + 4 long flashes | Flash-Code: 1 short then 4 long pulses The oil burner control locks out because a flame was not established within the safety time. | RED |
| 2 short + 3 long flashes | Flash-Code: 2 short then 3 long pulses (stray light) The oil burner control locks out because it detects stray light during the monitored phase. | RED |
| 2 short + 8 long flashes | Flash-Code: 2 short then 8 long pulses (manual/external lockout) The oil burner control is deliberately placed into a manual or external lockout state, stopping operation. | RED |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.