The following spare parts are available for the model number R40 GS5 (3755219):
Burners
Controls
| Part name | Also known as |
| 30-20-230 - GS5 Control Box MG557-3 | GS5 controller MG557-3, GS5 ignition controller MG557-3, GS5 electronic controller MG557-3, GS5 auto ignition controller MG557-3, GS5 main burner relay MG557-3 |
Dampers
| Part name | Also known as |
| 3020239 - GS5 Air Damper Assembly |
Gas Valves
| Part name | Also known as |
| 3970569 - GS5 On/Off Gas Train Only (Includes Valve & Pipe) |
Other Heater Components
| Part name | Also known as |
| 30-06-707 - GS5 Flame Sensor | |
| 30-07-423 - GS5/10/20 Pressure Switch | GS5/10/20 vacuum switch, GS5/10/20 aps / air pressure switch |