⚠️ SAFETY FIRST: READ BEFORE STARTING
Working on electric showers is dangerous. You are dealing with a high-voltage appliance (240V) and water.
ISOLATE POWER: Always turn off the electricity at the main consumer unit (fuse box) and pull the isolation cord before removing the shower cover.
VERIFY DEAD: Use a voltage tester to ensure no power is reaching the unit.
LEGALS: In the UK, major electrical work in bathrooms is "Part P" regulated. If you are not a competent person or are unsure of these tests, stop and consult a Part P qualified electrician.
DISCLAIMER: You follow these guides at your own risk. This site and its authors are not liable for any injury, loss, or damage caused by your repairs.
We have posts on this blog for all the below issues so please see Index page here
Quick Fault-Finding Benchmarks:
Solenoid Valve: Should test at approximately 3.7 kOhms. If you get no reading (OL), the water will not flow.
Thermal Cut-Out (TCO): Must have continuity (0 ohms). If it measures anything else, your heater tank has no power.
Heating Elements: Look for 11 ohms to 15 ohms per element. Total resistance in parallel should be 6 ohms to 8 ohms.
Pressure Switch: Check for mechanical movement. If the mains pressure is low, the microswitches won't click, and the shower will stay "dead."
1) No water or power like a totally dead shower , check the incoming mains pressure is operating the pressure switch.
First it might be best to check that the mains stop valve is fully on , turned beck in 1/4 to 1/2 a turn to ensure it does not seize up.
The micro switches should turn on correctly if pressure is set good.
2) Water goes hot and cold - usually pressure issue see above for more advice if ok them check the flow stabiliser valve inside make sure everything is ok if not replace the flow stabiliser valve.
3) No Heat water totally cold check the TCO and the heater elements.
4)Water dripping from the bottom of the shower is a sign that the PRD has blown this can be caused by limescale build up in heater or shower hoses blockage so check these prior to repair.
5) No water or water cuts in and out , shower shuts off while using it. Test the solenoid valve. it should be around 3.7 K ohms
See our post on solenoid testing and replacement here
See the below video for more in formation and walk through all above electric shower problems.
Before you strip the shower down, check your kitchen sink's cold water flow. If it’s weaker than usual, your local water board might be doing maintenance. A slight drop in mains pressure is enough to prevent the shower's internal pressure switch from engaging, making the unit appear 'dead' when there is actually no electrical fault at all.
Triton parts
Buy main seals on Ebay UK here
Buy triton solenoids on Ebay UK here
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