E193
Potterton
Pump / Flow Detection Fault
Boiler shows E193, often associated with pump or flow issues on system boilers
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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.
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Possible Causes
Pump not running, Airlocked pump, Blocked system filter, Seized pump rotor
How to Fix / Troubleshooting
Safety first: Isolate power and allow the system to cool before touching the pump.
User checks:
- Bleed radiators and ensure system pressure is correct.
Engineer checks:
- Check for voltage at the pump terminals when there is a heating demand.
- Remove the pump head and inspect the rotor; free if seized.
- Clean any system filter or strainer and check for sludge.
- Replace the pump if it fails to run or circulate adequately.
Restoring circulation will usually clear E193 faults.
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Repair Difficulty
Hard
4/5
Required Part
Central Heating Pump
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