water temp & pressure very low

My shower mixer, trevi THERM 300,suddenly gone very low on water temp & pressure.i have cleaned up therm/cartridge's filter & fitted back but the problem has not gone.Water temp/pressure is still very low.Do I have now to replace little 2 cartridges (hot & cold water flow)!.

Please advise asap.Thanks.

Also is it difficult to replace them just in case!..
Asked 10 years ago by Anonymous
Try flushing the shower with the thermostatic cartridge removed. If this does not work remove the flow cartridges to see if there is a blockage, they just screw out.

Answered 10 years ago by Anonymous

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