This question is regarding Mira Excel/Select Thermostatic Cartridge - 903.33

Mira Excel Temperature adjustment

Recently fitted a new Alpha InTec 30 combi boiler. When turning the temp adjustment ring up to high the water does heat up as it should, though the pressure remains high. Might there be a problem with the internal thermostat function, or does the pressure need to be adjusted? Also the valve is slightly stiff when turning on and off.

Thanks.
Asked 12 years ago by Anonymous

Yes the valve could be stiff due to the age and extrapressure.

However if you remove the cartridge you will find that theretwo holes that the red key will fit into (see the link below) if you don’t have the red key a pair of long nosedpliers will do.

On the back of the cartridge stamped in to the rear arearrows pointing to high and low push the key or pliers into the holes and turnto the high setting.

 http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Mira-Excel-Shower-Cartridge-903-33-Spare-Part

When it is out make sure that the cartridge filters areclear.

This should solve the problem however if not then it is justthe age of the cartridge and the extra pressure that is causing the problemtherefore it will have to be replaced.

Answered 12 years ago by The Shower Doctor

View Product and Order Online:

Do you require any further help with Tap or Shower Cartridges?

Please click the following link if you would like to see other answers or ask a question regarding the Mira Excel/Select Thermostatic Cartridge - 903.33

If you've landed here and this question is not about your specific product, please take a look at these similar items on our Mira Cartridges page. Alternatively, if you're looking for any other brands you should view our full range of Cartridges.

If you would like to buy this cartridge or look others from the same brand, please view our Replacement Mira Cartridges (All)

For any other support request please get in touch.