Burner controls, ignition and flame safeguards
Weishaupt W-FM 200 Combustion Manager fault codes
What all 16 Weishaupt W-FM 200 Combustion Manager 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 |
|---|---|---|
| 23 | Loc.c 23 / Err.c 23 The burner locks out because extraneous light was detected during the startup sequence. | RED |
| 24 | Loc.c 24 / Err.c 24 The burner locks out because extraneous light was detected during the shutdown sequence. | RED |
| 25 | Loc.c 25 / Err.c 25 The burner locks out because no flame was present at the end of the safety time. | RED |
| 26 | Loc.c 26 / Err.c 26 The burner locks out because the flame failed while the system was in operation. | RED |
| 27 | Loc.c 27 / Err.c 27 The air pressure switch sent an impermissible ON signal, which locks out the burner. | RED |
| 28 | Loc.c 28 / Err.c 28 The air pressure switch sent an impermissible OFF signal, which locks out the burner. | RED |
| 29 | Loc.c 29 / Err.c 29 The fan contactor sent an impermissible ON signal, which locks out the burner. | RED |
| 2A | Loc.c 2A / Err.c 2A The fan contactor sent an impermissible OFF signal, which locks out the burner. | RED |
| 2B | Loc.c 2B / Err.c 2B The flue gas recirculation air pressure switch sent an impermissible ON signal, which locks out the burner. | RED |
| 2C | Loc.c 2C / Err.c 2C The flue gas recirculation air pressure switch sent an impermissible OFF signal, which locks out the burner. | RED |
| 2D | Loc.c 2D / Err.c 2D The burner locks out because there is an impermissible on signal at the gas start release input. | RED |
| 2E | Loc.c 2E / Err.c 2E The burner locks out because there is an impermissible off signal at the gas start release input. | RED |
| 2F | Loc.c 2F / Err.c 2F The low gas pressure switch has reacted, which prevents the burner from operating. | RED |
| 30 | Loc.c 30 / Err.c 30 The high gas pressure switch has reacted, which prevents the burner from operating. | RED |
| 31 | Loc.c 31 / Err.c 31 The burner locks out because the valve proving test detected a leaking first valve or an unopened second valve. | RED |
| 32 | Loc.c 32 / Err.c 32 The burner locks out because the valve proving test detected a leaking second valve or an unopened first valve. | RED |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.