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The electic shower keeps going cold for a few seconds then hot

Our shower has started to run cold for a few secomds then will run hot. I have turned the hot water up on the boiler and checked the pressure all seems in order
The boiler is a RAVENHEAT. I dont know what make the shower is, its fitted over the bath, but all you can see is the on / off dial knob type switch, and a similar and the same kind of dial for the temp. The Shower was in when we moved in.

Any ideas what I can do before I call a Plumber.

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I have a triton trance 2nd generation electic shower that is a couple of years old when you turn the flow on it comes out red hot but as you increase the flow it gets colder as flow is increased what is...


Is it possible to have plumber come inspect? Warranty from purchase place? Since you don't sound you put it in I'm guessing a plumber did? It would've been new to him for the most part and he may have hooked something up wrong? You CAN DIY but realize that we're talking electric AND plumbing here. I'm thinking since it heats up the electric is fine. But check your man's work to see if it's got the 30-45A fuse on a dedicated circuit.
Steps
1.While out ay elect. box turn OFF by removing fuse or switching to OFF. Test unit that it only runs cold water.
2. Find shut off for water. Sometimes you have to shut off whole house! Hopefully somebody added a shutoff. Look on backside of shower for a 1'x1' hatch covering with a cold and hot valve. Turn water off. Test unit to see if it runs.
3. Now use the manual below and get in there and see if its hooked up right. Go slow and take your time. Retrace the install instructions.

Best wishes. Wear nitrile gloves for peace of mind!

DON'T do it if you're not aware of the electrocution issue. Water all over your bathroom (loo?) is one thing, a 230v shock is another!
http://www.tritonshowers.co.uk/media/640966/trance.pdf

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Your whole house is likely plumbed wrong so that it is impossible to have equal pressures of both hot and cold at your shower. If you had your home plumbed with aquapex using a radiator for the hot water and a radiator for the cold water and have the radiators fed with a 1 inch line you can have close to perfect pressures.

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If you need further assistance, you can call us direct at 800-334-0455

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