B1D29-93: No Start, Even After Restart Attempt - No operation: Action

NOTE: This DTC is set when no flame is detected, even after re-start attempt.

Check the fuel fired booster heater fuel pipe for blockages/leaks and replace as required
If the fuel fired booster heater fuel pipe is replaced then, using the manufacturer approved diagnostic system, clear the DTCs and perform routine - Manufacturing Fuel Priming (0x2026)
Check the fuel fired booster heater exhaust for blockages and rectify as required
Using the manufacturer approved diagnostic system, clear the DTCs and perform routine - AHCM Operation Test (0x9013). This will operate the fuel fired booster heater for 15 minutes. Note that the routine should be started only when the engine is cool. The routine should be performed with the engine running and with the climate controls set to maximum heat and maximum fan. Repeat the routine again if smoke continues to be visible from the fuel fired booster heater exhaust pipe or from the area surrounding the fuel fired booster heater
If a fuel fired booster heater fault persists, replace the fuel fired booster heater combustion tube and evaporator assembly, clear the DTCs and perform routine - AHCM Operation Test (0x9013)
If the fault persists, install a new fuel fired booster heater, clear the DTCs and perform routine - AHCM Operation Test (0x9013)