Mira thermal cut-out assembly (TCO) (439.90)

Mira thermal cut-out assembly (TCO) (439.90) - main image 1


£12.55 (£10.46 ex. VAT) + P&P Lowest Price Guarantee
In Stock RRP £14.89
  • Product Description:

    Mira thermal cut-out assembly (TCO).

    Product code also known as Mira 1.439.90.5.

    Note: Please check that this TCO fits the version of the shower that you have, as there are different versions of the Sport/Jump/Sprint. Please view compatible models by clicking 'this product fits' or see our article on identifying showers and parts for more help.

    The Mira thermal cut-out assembly (TCO) (439.90) is a genuine, brand new Mira product, covered by a minimum 1 year Mira manufacturer's guarantee.

    Available for same day despatch if ordered before 3:30pm Monday-Friday (otherwise despatching will be on the next working day). For the delivery options available for this product, please add it to your Basket or see our delivery options page.

    Not what you're looking for? Try our unique Shower Spares Finder or you can see all Mira spare parts.

    For advice on this or any product, please call 01452 619836, email us at support@showerspares.com, or see our contact page.

    Product Specifications:

    • Brand Mira
    • Name Mira thermal cut-out assembly (TCO) (439.90)
    • SKU / MPN Mira 439.90
    • GTIN / EAN 5013181020410
    • Category Shower Spare Part
    • Availability In Stock
    • Despatch Same Day Despatch
    • Condition Brand New
    • Returns 30 day money-back guarantee
    • Manufacturer Guarantee Yes
  • The Mira thermal cut-out assembly (TCO) (439.90) will fit the following 17 products.

    List(s) are sorted by product type and then alphabetically.

    Hover overTap any icon below to see a preview of that model.

    May fit other products.

    If you are unsure of your product model, or would like more information, please contact us.

  • A selection of the latest reviews for the Mira thermal cut-out assembly (TCO) (439.90) can be read below:

    • Very good product, easy to replace and very good service from shower spares.

      Kirti Patel

    • Part fixed shower, arrived on time

      Mr Turner

    • It was a good choice to use NSS for the purchase of the thermal cut out assembly for my Mira shower. Their web site is easy to navigate and it was easy to process my order which arrived before the stated delivery time, the product was Mira and of the highest quality it was also extremely easy to install. What more could want.


    • Fitted easily and worked perfect.


    • Was easy to fit and it did the job

      Carolyn Sargeant

    • a first class service and fast delivery -

      Allan Boot

    • What more can I say 5 star sevice

      Nigel Warrington

    • I needed a TCO for my son's Mira Go shower, I found the exact part on the NSS website, ordered it and the correct part arrived within a couple of days, this is a genuine MIRA part and is an exact match

      Tony Richbell

    • Quick delivery of the right part at a good price. What more can you ask?

      Richard Price

    • It's great we can get spares for showers, saves a lot of work ( re tiling or moving pipe work) Thanks

      Gordon Carver

    • fast delivery, easily fitted, litte bit dearer than expected (hence 4 out of 5) but all in all happy with product and service

      John Simpson

    • Easy fix to a Mira shower that couldn't regulate temperature.
      Note: remember to turn power off at the mains - not like me... 😬

      Jerry Hayter

    • Perfect communication, item was perfect replacement, smooth transaction ⭐️⭐️⭐️⭐️⭐️

      Barry Wilson

    • Quick and accurate advise when placing order, simple process plus easy to follow fitting guide included

      Graham R Fearnley

    • correct part delivered as promised, fitted and working.

      Lj Curtis

    • As advertised a direct replacement for my shower. Sorted the fault out as I could not get hot water.

      Martin Harrison

  • Do you have a question about the Mira thermal cut-out assembly (TCO) (439.90)?

    Click the button below to send a question to one of our expert members of staff and we will email you back a direct response. If we feel the information might be useful to other customers, we will also show your question below for others to see.

    Ask a Question

    • I have a Mira Vie shower 8.5 kw, power goes to the shower but there is no heat, I am thinking thermal cut out switch ?

      Yes, from your description the thermal switch does need replacing.

    • My Mira go shower has been working perfectly since we had it installed but recently it has started to get really hot have descaled the shower head and checked the inlet filter it was better for a few days but now even with the heat control down to min. is it almost to hot to get in. could this be the thermal switch ? any help would be appreciated
      Thanks Pete

      Have you tried turning the dial down to the first heat setting and starting the temperature dial at cold then turning round to hot? What sort of temperature do you get then?
      National Shower Spares

    • Hi - we have a mira play shower and experiencing some problems. Shpwerbflows perfect but then loses heat intermittently. Sometimes during a shower but sometimes just does not get hot. Could this be the thermal cut out? Curve ball is the shower can start hot then go cold after a few minutes. Leave it for 30 minutes and it gets hot again.

      Hello, yes this is most likely to be a thermal switch, it could also be the pressure switch dropping out, you would have to re-create the fault, then test the thermal switch for continuity, open circuit = faulty. Job for an electrician.

    • Hi there
      My mira play shower has just started to cut out half way through a shower all electrics are working fine I switch it off and leave for 10 mins and then it starts to work again. This doesn't happen every time it is intermittent.
      Any help would be great

      Hello, if it stops flowing you need a new solenoid, if it stops heating but stays flowing then it is probably the thermal cut out.

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