Sudden fluctuation in water temp

Whilst using the shower at a normal temperature, suddenly the auto reset light will come on and water will run cold. After approx 30secs auto reset light goes off and temperature returns to normal. This continues to happen for the duration of the shower. Have replaced the micro swithes but no difference. Any ideas as to what else could be wrong?
Asked 11 years ago by Murray

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 cool it properly the overheat safety device will turn the power off until it cools Then it all starts again

Make sure that the shower head is clean and clear, that the hose isn’t kinked (this can happen just behind the hand set where it is difficult to see) also check the inside of the hose although it can look OK on the outside it could have collapsed internally.

Check to see if there is a leak from the pressure switch assembly as this sometimes cracks.

Answered 11 years ago by Anonymous

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