Generac — Disabling Automatic (AUTO) Exhaust After-Treatment Cleaning
Operation · REGEN INHIBIT switch
From a Generac owner's manual covering: MDG150, MDG175, MDG250. Check it applies to your exact model before use.
Applies to: Generac MDG150, Generac MDG175, Generac MDG250, John Deere 6068HFG05 / 6068HFG06 engine
Before you start
- Only disable for safety-related situations or if the fuel tank lacks fuel to complete cleaning.
Procedure
- Open the control door and locate the switch labeled REGEN INHIBIT.
- Set the switch to DISABLED (O).
- Enter the SCR status screen and verify SCR INHIB - SOLID appears.
Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →, John Deere 6068HFG05 / 6068HFG06 engine →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.