The Potterton fan gasket part is located around the fan section. The fan is the device that introduces fresh air into the combustion chamber, allowing the gas to be burned correctly. It also extracts the toxic gas after the combustion process is complete. The boiler has safety parameters in place to make sure no gas can be passed through to the main burner if the fan is not operating correctly.
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Technical specification
TypeGasketManufacturer Model No5000856Brand NamePotterton