THE SHORT ANSWER
What happened when you tried to start it?
A shower that will not start needs a different assessment from one that runs cold. Identify the model, distinguish no flow from a temperature problem, and record the normal visible status and any already-known wider water issue. These clues help route the problem; they do not prove a failed part.
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Is there no flow, or a different shower problem?
This guide is for a shower that will not start or produces no water at the normal start attempt. If water is flowing but cold, weak or changing temperature, follow the matching guide instead. If it starts normally and later cuts out, record that different pattern for the maker rather than treating it as a failure to start.
| What you already noticed | Useful next step |
|---|---|
| Electric shower: no flow, no usual lights | Record the absent indicators and model. A supply issue is possible; an unlit light does not prove which part failed. Seek maker advice or qualified electrical assessment. |
| Lights on, but no water | Visible power indication does not establish water availability or that internal components work. Report any code and known water interruption. |
| Mixer shower: no water | Report known loss of either feed and recent work. Normal water elsewhere does not rule out a local supply or valve problem. |
| Pumped, digital or unknown arrangement | Record the visible controller and message. Ask the installer or maker to identify the system; do not seek out a hidden pump or processor. |
| Other outlets already known to have no water | Report the wider issue to the landlord/building operator or water supplier as appropriate. Do not repeatedly try the shower during a known supply interruption. |
Water is already flowing?
Use the guide for the symptom you already observed.
Sources
- Triton Showers - What are the different home water systems?
- WaterSafe Register - What can I do to reduce the risk of burns and scalding?
- Mira Showers (Kohler Mira Ltd, UK) - No water from your Mira electric shower?
- Triton Showers - Why is there no water flow from my electric shower?
- Triton Showers - No water flowing from my mixer shower
When should you stop and keep clear?
If water has reached electrical equipment or exposed wiring, keep clear and arrange suitable electrical and plumbing help. Do not touch wet controls. Use emergency services if there is immediate danger. Do not remove a cover, test wiring, reset an RCD or breaker, operate an unfamiliar isolator, or open a valve to investigate this symptom.
Sources
What can you check without dismantling or restarting?
Identify from outside
From a dry, safe position, record a visible make/model or use paperwork you already have. Note whether it is electric, mixer, pumped or digital only if you know. Leave hidden pumps and processors alone; ask the landlord or installer if uncertain.
Record the normal control and status
Compare the visible controls and any existing light, message or code with the exact user guide. Distinguish the flow or Start/Stop control from the temperature control. Record what happened at the ordinary start attempt already made; do not keep pressing buttons or try a reset.
Record the wider pattern
Note any water outage, building notice, recent work or other outlets already known not to work. Do not open taps to create a test, turn valves or visit a tank. Give these observations and the model to the appropriate service contact.
A temperature dial is not always the flow control
Use the exact model guide to recognise its ordinary start control. For example, Mira Vista Heatloop has separate temperature selection and Start/Stop. On that model the temperature display pulses while warming; the Start/Stop light pulses and beeps during its shutdown purge. These are different signals, not fault codes for every shower. If the correct ordinary start attempt has already failed, stop there and report the model and status.
Sources
- Triton Showers - What are the different home water systems?
- WaterSafe Register - What can I do to reduce the risk of burns and scalding?
- Electrical Safety First - Electrical safety after a flood
- Mira Showers (Kohler Mira Ltd, UK) - No water from your Mira electric shower?
- Triton Showers - Why is there no water flow from my electric shower?
- Triton Showers - No water flowing from my mixer shower
- Mira Showers (Kohler Mira Ltd, UK) - Mira Vista Heatloop Installation & User Guide 1608931-W2-B
Why might a shower give no water?
An electric shower needs its specified water and electrical supplies. Maker troubleshooting also includes internal flow/control components, but the same symptom does not tell you which needs attention. A lit indicator is useful information, not proof that the electrical supply or the shower is sound.
A mixer depends on hot and cold feeds. Some thermostatic valves can stop flow if either feed fails. Local filters, valves or the installation may also need assessment. Do not assume a cartridge has failed or order one from the symptom. A pumped or digital system needs its own model information; a controller alone cannot establish the condition of remote equipment.
Do not dismantle or reset a shower to investigate no flow
Checks involving showerhead or filter removal, supply switches, valves or pump priming depend on the exact equipment and fault. Do not try them as generic no-flow tests. Keep the unit closed and ask the maker or installer which ordinary user checks, if any, apply to your model; internal electrical work needs a suitable qualified person.
Sources
- Triton Showers - What are the different home water systems?
- WaterSafe Register - What can I do to reduce the risk of burns and scalding?
- Mira Showers (Kohler Mira Ltd, UK) - No water from your Mira electric shower?
- Triton Showers - Why is there no water flow from my electric shower?
- Triton Showers - No water flowing from my mixer shower
- Mira Showers (Kohler Mira Ltd, UK) - Mira Vista Heatloop Installation & User Guide 1608931-W2-B
Who should assess it, and what should a quote include?
For a rented home, start with the landlord or managing agent. For a known wider water interruption, contact the water supplier or building operator as appropriate. If only this shower is affected, contact the installer or manufacturer with its model, visible status, when it last worked and any recent work. For an electric shower with a possible electrical supply issue, use a qualified electrician or the maker's service route; do not ask an unqualified person to investigate wiring.
Ask whether the assessment or call-out is charged, what labour and parts are included, whether VAT applies, and whether a return visit is extra. The model, access, fault found, parts availability and whether replacement is needed affect the work. A diagnostic visit and a repair or replacement are different scopes, so ask for a quote that states what is included.
Prepare a useful fault report
Keep the visible model, existing code or light pattern, last successful use, recent work and already-known wider water issue together. The checklist can help organise a service visit.
Questions about a shower that will not turn on
Do lights mean the electric shower should work?
No. A visible light is a clue to report, not a test of the water supply or all electrical components. If the normal start attempt gave no water, record the status and seek model-specific service advice.
Can a mixer stop because only one supply is missing?
Some thermostatic valves stop flow if either feed fails. This is one possible explanation, not proof of a fault in your shower. Report a known supply interruption; do not turn hidden valves to test it.
Should I keep pressing Start or reset the power?
No generic restart or reset sequence applies to every model. Some models have a phased shutdown. Use the correct model information and report the failed ordinary start attempt rather than cycling supplies or repeating attempts.
Sources
- WaterSafe Register - What can I do to reduce the risk of burns and scalding?
- Mira Showers (Kohler Mira Ltd, UK) - No water from your Mira electric shower?
- Triton Showers - Why is there no water flow from my electric shower?
- Triton Showers - No water flowing from my mixer shower
- Mira Showers (Kohler Mira Ltd, UK) - Mira Vista Heatloop Installation & User Guide 1608931-W2-B
EVIDENCE & ACCOUNTABILITY
Sources and review
Prepared by Plumber.org.uk with AI assistance, using the sources listed below. These sources support the explanations; they do not endorse this website.
Source and editorial checks completed. Professional plumbing review has not been carried out. Initial research: 2026-10-27. Updated: 2026-10-27. This is general information, not an assessment of your installation. Prices can change; confirm compatibility and the full repair quote before buying or booking.
How we research and update guides. Spotted an error? Contact us with the page address and the detail to check. This form is for general enquiries and editorial feedback, not emergency assistance.
- Triton Showers - What are the different home water systems?
Accessed 2026-09-29; sections on mixer and electric showers describe mixer hot/cold supplies and electric showers heating a cold mains feed in the unit.
- WaterSafe Register - What can I do to reduce the risk of burns and scalding?
Accessed 2026-09-29; page states that TMVs mix hot and cold water and some will shut down flow if either supply fails.
- Electrical Safety First - Electrical safety after a flood
Previously checked 2026-09-28 and reused from accepted low-water-pressure research; keep clear of exposed wiring and water-damaged electrical equipment; have affected equipment checked by an electrician. Original date and source wording retained.
- Mira Showers (Kohler Mira Ltd, UK) - No water from your Mira electric shower?
Checked 2026-10-27. Main answer lines 114-136: lights, water supply, concurrent use/recent work, possible electrical supply fault and customer-service escalation.
- Triton Showers - Why is there no water flow from my electric shower?
Checked 2026-10-27. Main answer line 102: water/electricity supply, inlet filter and cover/start-stop cable are possible checks.
- Triton Showers - No water flowing from my mixer shower
Checked 2026-10-27. Main answer line 102: hot/cold supply, check valves, inlet filters and low-pressure installation height.
- Mira Showers (Kohler Mira Ltd, UK) - Mira Vista Heatloop Installation & User Guide 1608931-W2-B
Checked 2026-10-27. Printed pages 35-36 Operating the Shower: separate temperature selection and Start/Stop; pulsing display while warming; phased shutdown. Page 40 excludes user servicing inside cover. Independent Luna High source review27October: p.35 distinguishes temperature-display pulsing during warming from Start/Stop light pulsing/beeping during shutdown; p.3 says turn off/do not operate for low/no flow, p.40 no internal user-serviceable parts. Root corrected the exact indicator wording and retains recognition-only scope.