Thermostatic shower running too hot or too cold
Check the steps below first — if you\'re not confident, get it fixed safely today.
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Most likely cause & what to check
Check whether anything has changed recently — a new boiler, altered water pressure, or someone adjusting the temperature limiter are common causes.
Look at the shower dial — some thermostatic valves have a small cover cap that hides a temperature limit screw. Try removing the cap and adjusting the temperature limit slightly.
If the temperature is erratic or won't stabilise at all, the thermostatic cartridge inside the valve has failed. Call a plumber. Tell them: "My thermostatic shower is running too [hot/cold] and the dial doesn't seem to make a difference."
Find a Gas Safe registered engineer near you and get it fixed properly.
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