What is the Worcester Bosch boiler EF fault / error code?
Answered by John Bennett Heating Limited
20th April 2020
John Bennett Heating Limited answered the question "What is the Worcester Bosch boiler EF fault / error code?"
Central Heating Boil Detected. Boiler operating at minimum burner load with the temperature difference greater than 18 degrees Celsius between the flow and return temperatures. This could be a number of factors from blockages to broken pumps etc. Best to call a gas engineer to come and test the boiler safely.