Redring Water too HOTwhat to check
Redring give six checks, and the one that distinguishes them is a filter inside the solenoid valve that other brands do not send you to.
Take care
What this means
Redring split this fault across their two tiers, and the split is instructive. On the owner side they publish six things to check, and they are the usual flow-related suspects: whether the local isolating valve is fully open, whether a lower power setting would help, and cleaning the inlet filter of any dirt or debris. Those follow from the same physics every brand in this category runs on — a fixed amount of heat going into a variable amount of water means less water is hotter water — so restoring flow is what brings the temperature down.
Where Redring diverge is on the professional side, and it is worth knowing about even though it is not an owner job. Their qualified-service checklist for water too hot sends the engineer to a place the other manufacturers do not mention: water flow restricted by a blockage in the filter of the solenoid valve, remedied by switching off the water, loosening the inlet connection to the solenoid, removing the filter with long-nosed pliers and flushing it clean. That is a second filter, inside the valve, distinct from the inlet filter the owner is asked to clean.
On the Expressions model they go further and say to replace the solenoid valve if it is blocked. So a Redring that still runs too hot after the accessible filter has been cleaned has a documented next step that a general checklist would miss, and mentioning it when you book saves a visit that concludes nothing was found. The other Redring-specific detail is the stabiliser valve, which appears in the same professional checklist and is the component that holds the flow steady.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Blockage in the inlet filter | Redring’s owner-side check. Dirt and debris in the accessible filter throttle the supply before it reaches the heater. | Common |
| Local isolating valve not fully open | Named in their owner checks. A part-closed valve throttles the shower without affecting anything else in the house. | Common |
| Power setting too high for conditions | Redring answer with selecting a lower power setting. Fewer elements delivering less heat into the same flow. | Common |
| Blocked filter inside the solenoid valve | The Redring-specific one, from their professional checklist. A second filter, inside the valve, that has to be extracted with long-nosed pliers. | Occasional |
| Stabiliser valve fouled | From the professional checklist: undo the headworks, check the stabiliser is in place and remove any debris. It is what holds the flow steady. | Rare |
What to try yourself
Check the local isolating valve on the shower feed is fully open. Redring list this among their owner checks and it costs nothing.
Select a lower power setting, which is Redring’s direct remedy. Fewer elements running means less heat going into the same water.
Clean the handset and check the spray plate. A scaled head is the commonest restriction and the easiest to put right.
The last of Redring’s six is to clean the inlet filter of any dirt or debris. Their filter instructions have the electricity off at the isolation switch and the water off at the isolation valve first, then the filter cap unscrewed from the bottom of the inlet housing. Read them before you decide it is yours: Redring say the job is for a competent person, and if it means taking the front cover off your model, it is not.
Redring’s filter instructions say it is essential the operation is carried out by a competent person, and their self-help page ends: if an answer requires removal of the front cover, please seek the help of a qualified person. Their capitalised warning is to switch off the electrical isolation switch before the front cover comes off.If it is still too hot, mention the solenoid filter when you book. Redring’s professional checklist sends the engineer there, and it is not the filter you just cleaned.
Get a qualified electrician to look at your Redring electric shower
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified electrician, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£170
Time on site
25 minutes
Nothing for the owner-side checks. A solenoid filter clean is a visit; a solenoid valve replacement, which Redring name on some models, is a visit plus a part.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related Redring fault codes
- otGet it checkedOver Temperature Shutdown on a Selectronic: the water got too hot, so the shower stopped it. Purge it cold before restarting, and stop using the isolator to switch off.Related: overheat
- Shower cycles from HOT to COLDGet it checkedRedring name one cause: the temperature is set too high, so the thermal cut-out keeps operating. Their fix is a dial adjustment done slowly.Related: overheat
- Heating after switch-offStop — call an engineerA Selectronic that has been stopped with the Start/Stop button but can still be heard heating has lost control of its elements. Redring’s answer is a new triac board; yours is the isolator.Related: overheat
- Water too COLDGet it checkedRedring answer this with eight checks in a deliberate order, and the seventh is the one nobody guesses: run the shower cold to reset the cut-out.Related: same brand
- Water dripping from the bottom of the showerGet it checkedRedring attribute this to the safety pressure relief having operated, and they are clear it is a replacement part rather than something that reseals.Related: same brand
- LPGet it checkedLP on a Selectronic Advanced means the water supply has dropped below two litres a minute. The shower has cut its heaters rather than boil a trickle.Related: same brand
Own a Redring electric shower? Save it and its codes come first next time.
Related guides
Common questions
Why does Redring mention two different filters?
Because there are two. The inlet filter is the accessible one their owner checks send you to. The second sits inside the solenoid valve and appears only in their professional checklist, extracted with long-nosed pliers and flushed clean.
Will a lower power setting waste water?
It will make you shower for longer at the same temperature, so the saving is smaller than it looks. But it is Redring’s own remedy for a shower running too hot, and in summer it is often the right setting anyway.
What is the stabiliser valve?
A component that holds the flow steady against variation in the incoming supply. Redring’s professional checklist asks the engineer to undo its headworks, check it is in place and clear any debris.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.