Mira Sport diagnosis
The trouble shooting information on this page gives details on what you can do as a user should you encounter difficulties whilst operating your Mira shower.

Appliance fails to operate. Power/Back Light – Off. Low Flow warning light – Off. Heater Setting – Any.
Fuse blown or MCB/RCD tripped, indicating possible electrical fault – Renew the fuse or reset the MCB/RCD. If fault persists, contact your installer.
Appliance fails to operate. Power/Back Light – Off. Low Flow warning light – Off. Heater Setting – Any.
Electrical Shower supply isolated at double pole switch – Switch on electrical supply via the pullcord or wall mounted switch.
Appliance fails to produce hot water when set on Medium/High heater Setting. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Medium/High.
Possible failure of the microswitch or thermal switch – Use a suitable continuity device to check the continuity of the microswitch or heater tank and replace parts as necessary.
Heater tank failure – Replace.
Appliance fails to produce hot water when set on Medium/High heater Setting. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Medium/High.
Insufficient water supply – Contact local water company.
Low or no flow. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Any.
Showerhead blocked – Remove and clean.
Heater Tank excessively scaled – Replace. In hard water areas consider the use of a water softener.
Service tunnel or cover not fitted correctly causing Start/Stop button not to operate – Check case inserts are cut and fitted correctly. Check services (electrical or plumbing) are not interfering with location of service tunnel or cover.
Flow Valve faulty – Replace.
Low or no flow. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Any.
Insufficient water supply pressure/flow for operation – Contact local water company. Supply pressure must be a minimum of 70 kPa (0.7 bar). Note! If other appliances are operating, pressure may drop below 70 kPpa (0.7 bar).
Water supply pipework or inlet filter restricted by a blockage or partial blockage – Flush supply pipe. Clean Inlet Filter.
Other outlets (e.g. toilet, garden hose, washing machine, etc.) drawing water while the shower is being used – Turn off other appliances whilst shower is in use.
No change in temperature between Low/Medium/High setting. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Any.
Possible failure of flow valve, microswitch, or heater tank – Use a suitable continuity device to check the continuity of the microswitch or heater tank and replace parts as necessary.
No change in temperature between Low/Medium/High setting. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Any.
Insufficient mains water pressure – Contact local water company.
Operation of Temperature Control has little or no effect on water temperature. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Medium/High.
Flow Valve faulty – Replace.
Heater Tank failure – Replace.
Microswitch failure – Replace.
Operation of Temperature Control has little or no effect on water temperature. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Medium/High.
Showerhead or Inlet Filter blocked – Remove and clean.
Shower cycles from hot to cold. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Medium/High.
Temperature dial or heater setting too high – Turn the heater selector knob to medium or turn the temperature control until a cooler temperature is achieved.
Shower cycles from hot to cold. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Medium/High.
Showerhead blocked – Remove and clean.
Water pressure below minimum required for appliance operation – Make sure incoming mains water stopcock and/or appliance isolating valve is fully turned on.
Showerhead dripping. Power/Back Light – Off. Low Flow warning light – Off. Heater Setting – Any.
Insufficient water supply pressure for shut off – Min static pressure to ensure shut off and prevent dripping is 0 kPpa (0.2 bar). Note! If other appliances are operating, static pressure may drop below 20 kPa (0.2 bar). Contact local water company. Renew Flow Valve.
Flow Valve faulty – Replace.
Unable to select a cool enough shower. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – High.
Due to the rise in mains water supply temperature, the heater setting may be too high – Turn the heater selector knob to medium and adjust the temperature control until a suitable temperature is achieved.
Water will not turn off. Power/Back Light – On. Low Flow warning light – Off. Heater Setting – Any.
Flow valve, solenoid, or Start/Stop switch faulty – Replace as necessary.
Water will not turn off. Power/Back Light – On. Low Flow warning light – On. Heater Setting – Any.
Supply pressure below 20 kPa (0.2 bar) – Contact local water company. Check mains water static pressure.