water but no heat

when i turn the shower on the water flows easily but there hot is no hot water. if i restrict the water by placing my hand over the shower head, the power light comes on and the water warms up. as soon as i remove my hand the power light goes out and the water runs cold. what is the cause of this.
Asked 10 years ago by Anonymous
The things to check first are.

1 That the main valve coming into your house is fully open.

2 Then check that the valve on the line to the shower is fully open.

If these valves are not fully open then there may not be enough water
getting to your shower to  open / close the safety device that allows power through to the elements

Answered 10 years ago by The Shower Doctor

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