expressions 500s 8.5

My expressions 500s 8.5 pulsates on starting up with the first shower in the morning , ok for any showers taken after that for the next ten hours.

It works fine if it is started on cold for a few seconds then switched over to hot, it worked perfectly previously no adjustments have been made to water pressure etc.
Asked 11 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 which could be causing the pulsing.

It may also be a faulty push button switch.

Answered 11 years ago by Anonymous

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