Stuart Turner Monsoon Professional fault E18
High ambient overheat
Shower pumpWhat it means
Ambient air temperature around pump has exceeded the maximum safe operating threshold, displayed as E18 on-screen.
Likely causes
- Ambient air temperature above 40°C
- Electrical supply fault
- Pump seized
- Motor faulty
- Control panel damaged
- Pressure setting incorrect
- Strainer blockage
- Inlet pipe diameter too small
- Blockage in inlet/outlet pipe
- Pump needs priming
- Water supply failed
- Pump outlet check valve stuck closed
- Inlet pipework not air tight
- Impeller damaged
- Installation max lift head exceeded
- Water inlet pipe too small
- Bearing damaged
- Check valve faulty (debris)
- Pressure vessel charge low
- Pressure vessel damaged
- Leak in system
Where to start
- Check ambient air temperature around pump
- Check power supply
- Check power supply cable
The full answer, free
- 18 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 22), right under the answer
Safety: Isolate power and water, and prove dead before you open or test the pump.
From the Stuart Turner manual for the Monsoon Professional. Check the model on the data plate before you order parts.