E2
Flow temperature sensor fault
The boiler has detected the flow temperature sensor as shorted or disconnected.
What this code means
The boiler has detected the flow temperature sensor as shorted or disconnected.
Possible causes
- Flow temperature sensor fault
- Sensor wiring short circuit
- Open circuit or disconnected sensor
Common symptoms
- E2 displayed
- Boiler may stop operating normally
- Temperature control may be lost
Checks to make
- Do not remove the boiler casing
- Arrange qualified diagnosis of the flow sensor and wiring
Safety
- Internal boiler electrical and combustion work should be performed by competent qualified personnel.
Model notes
Worcester technical literature maps E2 to shorted or disconnected flow-sensor conditions.