Heater Box Thermostat/Switch
 | Heater Box Switch (early cars) | |
 | Heater Box Thermostat (4-door cars) chassis numbers 30000-46783 | |
 | Heater Box Thermostat (4-door cars) chassis numbers 57001-66901 | |
 | Heater Box Thermostat, chassis numbers 08774-16970 | |
 | Heater Box Thermostat, chassis numbers 20001-29290 | |
| | Heater Box Thermostat, Continental R, chassis numbers 42001-42728 | |
| | Heater Box Thermostat, Continental R, Continental T & Azure, chassis numbers 52001-67538 & 01001-01876 | |
| | Heater Box Thermostat, Corniche & Continental, chassis numbers 30000-40533 | |
| | Heater Box Thermostat, Corniche & Continental, chassis numbers 50001-68621 & 02000-02079 | |
