| 14 | 800130 / 386-816 | Safety Valve | | |
| 16 | 800480 / E23-851 | Fan | | |
| 34 | 800320 / E23-839 | Central Heating Flow Temperature Sensor | | |
| 42 | 800320 / E23-839 | Domestic Hot Water Flow Temperature Sensor | | |
| 43 | 800150 / E23-840 | Air Pressure Switch | | |
| 44 | 800266 / E23-768 | Honeywell Gas Valve | | |
| 49 | 801270 / 386-815 | Overheat Safety Thermostat 100°C
| | |
| 50 | 800160 / 386-577 | High Limit Thermostat 88°C
| | |
| 81 | 806460 | Ignition Electrode C/N fixing Bracket | | |
| 82 | 801438 / E23-855 | Flame Sensing Electrode | | |
| 136 | 803430 / E03-340 | Flow Meter | | |
| 801873 / E23-862 | Main PCB DMF03 | | |
| 800655 / E23-848 | Ignition PCB | | |
| 27 | 802180 / E23-919 | Heat Exchanger | | |
