Redring t fault codewhat it means and how to fix it
A lone t on a Selectronic Premier, with bleeps, is the thirty-minute auto switch-off warning in temperature-lock mode. Press Warmer or Cooler and it carries on.
Before you start
What t means
On the Selectronic Premier the display normally shows a temperature digit, L through 1 to 9 up to H. When the shower is in temperature-lock mode, which is how Redring ship it and how it must be set for a BEAB Care Wash installation, the shower also switches itself off after thirty minutes. Near the end of that half hour it bleeps several times and the display changes to a lowercase t.
Redring’s instruction is short: to stop the shower switching off automatically, press either the Warmer or the Cooler button. Do nothing and the shower stops on its own, running its usual cool-down first. Nothing has failed. The feature exists because the Selectronic is sold as a care shower, for users who may not be able to end a shower reliably themselves, and a fixed run time is part of that. The same letter appears in one other place on the Premier, in the over-temperature shutdown, but there it alternates with a flashing o and comes with eight rapid bleeps and no water, which is a different event with its own page. The t on its own, with water still running, is only the timer.
Two things follow. First, a household that finds the shower stopping at half an hour is not looking at a fault, and the answer is the button rather than a call. Second, the timer is tied to the temperature-lock switch inside the unit, so a shower that has been changed to the unlocked position by the installer will not do this at all, and one that starts doing it after a service has probably had the switch moved back. The Selectronic Advanced has the same thirty-minute switch-off but handles it differently: it is set by DIP switch 6 inside the unit, enabled by default, described by Redring as switching off after thirty minutes of inactivity, and its guide does not describe a t display or a warning bleep for it, so on an Advanced this page is about the timer rather than the letter.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Thirty-minute auto switch-off approaching | The Premier’s published behaviour in temperature-lock mode: several bleeps, the display changes to t, and the shower stops unless a temperature button is pressed. | Common |
| Temperature lock switch set to a locked position | The timer only runs with the internal templock slider in positions 1 to 3. Redring ship the Premier locked in position 1, so most units do this out of the box. | Common |
| Mistaken for the over-temperature shutdown | The shutdown also shows a t, but alternating with an o, with eight bleeps and the water stopped. If the water is still running it is the timer. | Occasional |
What to try yourself
When the bleeps start and the t appears, press either the Warmer or the Cooler button once. The shower carries on and the display returns to the temperature digit.
If you would rather it did not stop at all, the change is the temperature-lock slider inside the unit to the unlocked position 4, which removes the timer and the lock together. That is an installer’s job behind the cover, and Redring say it must not be done on a Care Wash installation.
Check that the t is alone and the water is running. A t alternating with a flashing o, with eight bleeps and no water, is the over-temperature shutdown, which needs the purge on its own page rather than a button press.
Get a qualified electrician to look at your Redring t
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
Time on site
1 minutes
Nothing. It is a feature, and the only paid option is an installer visit to change the internal switch, which Redring advise against on care installations.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
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Related Redring fault codes
- Display behaves erraticallyGet it checkedRedring’s own heading for a Selectronic display doing odd things. Their fix is a power cycle at the isolator, and their aside is that the isolator should be off between showers anyway.Related: controls
- 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
- 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: same brand
- 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: same brand
- Water too HOTGet it checkedRedring give six checks, and the one that distinguishes them is a filter inside the solenoid valve that other brands do not send you to.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
Own a Redring electric shower? Save it and its codes come first next time.
Related guides
Common questions about Redring t
Why does my Redring shower switch off after thirty minutes?
Because it is in temperature-lock mode and the Selectronic Premier has a thirty-minute auto switch-off in that mode. The t and the bleeps are the warning. Press Warmer or Cooler to keep it running.
Can I turn the timer off from the front?
No. On the Premier, holding Warmer and Cooler together overrides the temperature lock for the current shower but it returns to locked mode next time, and removing the timer permanently means moving the slider switch inside. On the Advanced the timer is DIP switch 6 on the board. Both are installer work behind the cover.
Does the lock light tell me anything?
Yes. Redring’s temperature-lock light on the front is lit in the locked positions and off in the unlocked one, so if the light is on you can expect the half-hour timer.
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.