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Mira 903.33 Replaced Cartridge - Water Temp

This question is regarding Mira Excel (1990-96) Cartridge - 903.33

Had this replaced recently as previous one was stiff to turn. Now I have to turn it all the way to hottest setting, and then water hot for a few seconds before becoming just warm. It doesn't seem to matter what setting its at water is either just warm (at hottest) or cold. Have tried altering purple temp control but no change. Plenty hot water from taps etc from Glow Worm Combi Boiler.

Asked 3 years ago by Anonymous
 Regarding the temperature fluctuation or cool running, it could be a faulty cartridge. However to check this if you have the shower fed from a combi boiler, see if you can get hold of the hot supply pipe before it enters the shower or perhaps as it leaves the boiler.If when holding this pipe the temperature fluctuates or goes cool, then the problem is not with the shower but more likely with the boiler, as the shower can only deliver what the boiler sends to it. Disregard the temperature at the taps as they have a different flow rate.
Answered 3 years ago by George Thomson
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