E07
ACV
Fan Fault / Fan Speed Feedback Error
Boiler displays E07, fan may not start or runs briefly then stops
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Faulty fan motor, Blocked fan impeller, Loose fan connector, Faulty control board fan driver
How to Fix / Troubleshooting
Safety first: Isolate power before touching the fan or internal components.
- Listen for fan operation: On a heat demand, you should hear the ACV fan start before ignition. If it is silent, note this for the technician.
- Check flue and air intake: A severely blocked flue can overload the fan. Ensure the terminal is clear as described for E03.
- Visual inspection: With the cover removed by a competent person, check that the fan connector is firmly plugged into the PCB and that no wires are loose.
- Do not lubricate sealed fans: ACV boiler fans are sealed units; do not attempt to oil or dismantle them. If E07 persists, the fan assembly or PCB will likely need replacement by a professional.
Advertisements
Repair Difficulty
Hard
4/5
Advertisements