Mira 415
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.
Regarding the over ride button most likley you need a new knob set however I am not shure which model of 415 you have to suggest the correct knob.
Answered 8 years ago by Anonymous
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Mira 415 B (2001-2004) Combiforce
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