Thermostatic electric shower low pressure display always on

[Johntheo5]

Oh. So presumably movement of the diaphragm under pressure lets the button pop out. Not what I would have expected.

The two heating element microswitches are definitely NC and it's possibly likely that the low pressure switch is dimensional the same but is NC, but you or I or anybody doesn't have to know this, if you specified that it is a low pressure switch that you required, anyway see what happens when/if you do the above suggested test.

 

[TryAgain1]

The two heating element microswitches are definitely NC and it's possibly likely that the low pressure switch is dimensional the same but is NC, but you or I or anybody doesn't have to know this, if you specified that it is a low pressure switch that you required, anyway see what happens when/if you do the above suggested test.

The test is, as of now, to remove the shower's front casing and see if the LP microswitch's button has been unpressed?

 

[Johntheo5]

Agree but there may only be a few mm difference, hard to see, my test will be or should be pretty conclusive after 5 pages of posts.

 

[TryAgain1]

Agree but there may only be a few mm difference, hard to see, my test will be or should be pretty conclusive after 5 pages of posts.

I tightened the microswitch screw very tight. The new microswitch did turn on/off at the right times (on at initial shower turn on then off after 10 seconds) then after 5 mins defaulted to always on. Seems to be a mechanical problem either the switch or the diaphragm.

 

[Johntheo5]

All the more reason to do test as per post# 61.

 

[TryAgain1]

All the more reason to do test as per post# 61.

Post 61 "presumably movement of the diaphragm under pressure lets the button pop out" I took the front shower cover off and the new microswitch (installed and connected, screwed down tight) did not pop out. But the shower LP light still came on

 

[Johntheo5]

OK, as per post #57. Wires attached, switch not in its dowelled position and switch on the shower.

 

[TryAgain1]

OK, as per post #57. Wires attached, switch not in its dowelled position and switch on the shower.

So both brown wires attached and switch not pressed in (poking out) then turn on shower?

 

[Johntheo5]

Whatever, as long as nothing pressing on the switch button when the shower is switched on, ie, diaphragm not touching the switch button at all.