We have an electric shower, when the shower head is on we get low flow/cold water. If we take the shower head off then the pressure/temperature goes back up.
We've had this with a couple of shower heads, so it's not because they are old
Thanks
There will be a flow restrictor/ filter in the hose or shower head causing the low pressure! Can usually be removed with long nose pliers
Is the washer obstructing the inlet and is there a potential blockage?
The most common cause of low shower pressure is a blocked showerhead, as a result of limescale build-up. These blockages obstruct the water flow, leading to reduced pressure over time. Most showers are fitted with a filter, protecting the pipework from debris, but this can become partially blocked by scale.
It sounds like it’s a flow restriction problem see if you can purchase a low flow head that should help
This can be due to the heating element scaling up. The scale breaks away and runs through the hose to the head. The holes are too small to allow the scale to exit.