Alpha 1.014872 240 Overheat Thermostat
This Alpha Thermostat 1.014872 is fitted to the boiler to ensure no excessive temperatures can be encountered by the boiler. This replaces part No. 6.8432561.
This Overheat Thermostat is set at 105C .
This Alpha thermostat is a safety device that is fitted into the boiler to protect it from thermal shock and to switch off the boiler if high temperatures are detected. If this thermostat is operated the customer will normally have to re-set the boiler in order to get the boiler up and running again.
Alpha 240 ECO
The term OEM stands for "Original Equipment Manufacturer" this part is an original part and was bought from the Original manufacturer of the part.
What does that really meanr a boiler manufacturer such as Wocester Bosch, Baxi, Glowworm etc.
Below is an example:
Gas Valves on most British Gas Boilers are made by Honeywell, Sit, White Rogers etc. This means that these manufacturers are the OEM for the Boiler Manufacturers, so as long as the original part is purchased (Honeywell, Sit, White Rogers) from the OEM it can be sold as an original OEM product.
OEM parts are also referred to as After Market Parts.