Shower going hot and cold

Hi my mira sport thermastatic keeps going cold and after a few seconds back to normal temp, I have checked that the valve to the shower is full open and the shower head is not blocked I have also checked the thermal cut out I don't know it that may be on its way out, another thing I thought it could be is the filter cap I would appreciate if you could help me with this problem and give me some advice the low flow indicator does not come on when the shower goes cold either please reply ASAP
Asked 8 years ago by Anonymous

Alsocheck that you have aminimum of 1bar water pressure, although your pressure may normallybe good it can often drop dramatically first thing in the morningwhen everyone is showering.

Answered 8 years ago by Anonymous

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