The following spare parts are available for the model number RG4D (175):
Burners
| Part name | Also known as |
| 29-99-605 - Rg4D Tc Low Nox Oil Burner Hi/Lo | |
| 30-05-813 - Rg3D Tc, Rg4D Tc and Rg5D Tc Burner Gasket |
Controls
| Part name | Also known as |
| 3001174 - RG2D, RG3D, RG4D and RG5D Control Box | RG2D, RG3D, RG4D and RG5D controller, RG2D, RG3D, RG4D and RG5D ignition controller, RG2D, RG3D, RG4D and RG5D electronic controller, RG2D, RG3D, RG4D and RG5D auto ignition controller, RG2D, RG3D, RG4D and RG5D main burner relay |
Other Heater Components
| Part name | Also known as |
| 3007495 - RG1RKD, RG2D, RG3D, RG4D and RG5D Electrode Assembly | |
| 3007839 - RG1RKD, RG2D, RG3D, RG4D and RG5D Photocell | |
| 3007854 - RG1RKD/RG2KD/RG2D~RG4D Oil Pump |