The following spare parts are available for the model number ST400:
Gas Valves
| Part name | Also known as |
| 2079 - Gas Valve On/Off | solenoid valve On/Off |
Other Heater Components
| Part name | Also known as |
| 2070 - Auto ignition controller S4560D1101 upto 04/00 | Auto ignition control box S4560D1101 upto 04/00, Auto ignition ignition controller S4560D1101 upto 04/00, Auto ignition electronic controller S4560D1101 upto 04/00, Auto ignition auto ignition controller S4560D1101 upto 04/00, Auto ignition main burner relay S4560D1101 upto 04/00, Auto control box S4560D1101 upto 04/00, Auto controller S4560D1101 upto 04/00, Auto electronic controller S4560D1101 upto 04/00, Auto auto ignition controller S4560D1101 upto 04/00, Auto main burner relay S4560D1101 upto 04/00, control box S4560D1101 upto 04/00, controller S4560D1101 upto 04/00, ignition controller S4560D1101 upto 04/00, electronic controller S4560D1101 upto 04/00, main burner relay S4560D1101 upto 04/00 |
| 2076-3 - 4mm Olive & Nut Set | |
| R112752 - Limit. ST Range. | |
| R144598 - Spark Ignition Pilot |