Mira Sport Max in op

We have a problem with the temperature would go very hot and the overheat light would come on for a short period the water would run cold and then settle down when the light went out. Now the light is on permanently and the shower is cold.
Asked 12 years ago by Michael

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

If the above are Ok then the other possibility is a faulty flow valve not allowing the correct amount of water into the shower.

The problem you have is that with the shower continually going hot and cold the thermal switch has probably been over worked and has now failed.

There fore if the above checks are OK I think you are going to need a new TCO and a flow valve.

See below for how to check the Thermal Switch.

I think you may have a faulty Thermal Cut Out

A faulty TCO will have no continuity across the two terminals (The black thing on top of the heating tank)

Therefore a good TCO will have power at both connections and a faulty TCO will have power at only one.

(The function of the TCO is, if the water over heats it cuts the power off to the elements)

See Video.

http://www.youtube.com/user/showerdoc#p/u/2/_zi8JbEMYMs

 

Answered 12 years ago by Anonymous

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