hello everyone, i have a mira sport shower in the house we have just moved into, it was working fine but suddenly it has started going cold and the low flow light illuminates, if i remove the shower head the shower works normally and as soon as i replace the shower head it goes cold with the light coming on again, there a, but that may just be me, i would love to know if this problem is repairable without spending lots of money on a plumber who is going to charge me £65.00 just to knock on my door