The Worcester Bosch C7 fault or error code will show when the fan is not running during the start up process. The issue causing this fault or error code on your Worcester Bosch combi boiler can be caused by a number of different reasons, bust most commonly are issues with the fan, fan harness or printed circuit board. We advise if you have a C7 fault / error code showing on your Worcester Bosch combi boiler to call a Gas Safe registered boiler engineer. A good boiler expert will be able to troubleshoot the issue causing the C7 error code, and replace any broken parts on your Worcester Bosch boiler to fix the C7 Fault / Error code.
Before starting any work on the combi boiler, you need to ensure that the power supply to the unit is switched off. This can be done by locating the power switch or circuit breaker for the boiler and switching it off.
Check the pressure
A common cause of the C7 fault on a Worcester Bosch boiler is low water pressure. You can check the pressure gauge on the boiler to see if it’s below the recommended range of 1 to 1.5 bar. If the pressure is low, you can add water to the system using the filling loop until the pressure reaches the correct range.
Check the condensate pipe
Another cause of the C7 fault is a blocked or frozen condensate pipe. You can check the pipe to see if it’s blocked or frozen. If it’s blocked, you can clear it using a suitable tool. If it’s frozen, you can thaw it using warm water or a hot water bottle. It’s important to note that this task should be performed by a qualified heating engineer.
Check the fan
The fan is responsible for supplying fresh air to the boiler. If the fan is faulty, it can cause the C7 fault. You can check the fan to see if it’s spinning freely. If it’s not, you may need to replace the fan.
Check the pressure sensor
The pressure sensor is responsible for detecting the water pressure in the boiler. If the sensor is faulty, it can cause the C7 fault. You can check the sensor using a multimeter to see if it’s working correctly. If it’s not, you may need to replace the sensor.
Reset the boiler
Once you have checked all the possible causes of the C7 fault and rectified any issues, you can reset the boiler. This can be done by turning off the power supply to the unit and then turning it back on again after a few minutes.
It’s important to note that the above steps are general guidelines only, and boiler repair and maintenance should be performed by a qualified professional. If you are not confident in your abilities to fix a boiler fault, you should contact a qualified heating engineer or Worcester Bosch accredited installer to perform the necessary repairs. Also it is very important to note that boiler repair and maintenance should be performed by a qualified professional. Any attempt to fix a boiler fault without proper training and knowledge could be dangerous and can result in injury or further damage to the system.
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