Bobcat TL470 78-74 Error Code
78-74 Error Code
Door / Transport Lock Open / Active is the main cause of 78-74 error.To solve 78-74 locate and open the low-pressure valve, then attach the refrigerant to the valve and charge from there. Ensure you use the right refrigerant type and amount, as specified by a manufacturer. It is possible to overcharge the AC, so consider seeking help from a mechanic.
Tip For TL470 Model
It is recommended in cold weather to cycle the glow plugs twice before attempting to start the engine. This will allow for additional heating time for cold weather starting.