low pressure

Hello,
I'm having major problems with my electric shower and its only a year old! When you turn it on it registers low pressure so when you turn it hotter the low pressure light switches off, the water is scalding and it trickles out. So its constantly a trickle and either freezing or scalding. Can anyone tell me what could be the problem? Thanks

Sounds like a tankless hot water system? In the fine print, they often tell you you need to backflush the thing with vinegar to clean out the lime and crud, maybe on a monthly schedule, depending on the hardness of your water (think of a tea kettle and the crud that accumulates in the bottom of the thing except you are using a lot more water than that is). It sounds like the internal passages are clogged. You might want to call the manufacturer and reread the maintenance instructions and check out the troubleshooting part of the manual.