Bobcat S220 W4721 Error Code
W4721 Error Code
Sensor Supply Out of Range High is the main cause of W4721 error.A significant number of consequences can be suffered due to an overheating engine with code W4721. The problem might be a blown gasket or something related to the fuel tank.
Tip For S220 Model
When the temperature is below -30 C (-20 F), hydrostatic oil must be warmed before starting. The hydrostatic system will not get enough oil at low temperatures and will be damaged. Park the machine in an area where the temperature will be above -18 C (0 F) if possible.