This question is regarding Triton T90si Pumped - Shower Spares

Shower wont switch back on for a while

Have a T90si Pumped Shower and although an older model its had the majority of parts replaced (Heater Can, Thermal Cut out and pump etc) by Triton, but now those repairs are out of warranty. Current problem is that after showering for 5/10 mins with temperature dial set on 3 or 4 and then switched off. It won’t start again for a period of time. My initial thoughts are that it could be a faulty thermal cut out, but unsure how to best to test this. Are there some range readings my own engineer can check against? Thanks Paul
Asked 7 years ago by Paul
It may be your solenoid valve, you can check it if you have a multi meter, you should have a reading of at least k3.5 ohms, across the two terminals any less and you need a new valve. (Check the valve in the failed state.) (When it has stopped working!)

If there is power getting to the solenoid and it is not operating then there is a good chance that you have a faulty solenoid.

www.youtube.com/watch?v=NzJjzWqxesc

The video is intended as a guide and does not cover every shower.

If you don’t have a multimeter we sell them with a guide on how to use them for checking and testing the various parts of your shower.

Apart from helping to fix your shower, they are really useful for checking you have a power supply to appliances, for checking fuses and letting you know much power you have left in batteries

(So you will know if they are good or not) and lots of other jobs, in short they are well worth a few pounds

www.showerdoc.com/installation/electrical-products/SKYTRO-600-005-Digital-Multi-Tester

Answered 7 years ago by Anonymous

Hi, thanks for info.

Prior to use, checked thermal cut (HAS continuity) and 2 elements in heater can (11.9 & 15.2 ohms) plus solenoid valve (3.61 ohms). Ran shower with temp dial on 4, for 10/15 mins, then switch it off with on/off button, but could not recreate the original problem as it switched straight back on.

Turned the temperature dial up to 6+ and ran again for 10/15mins. This time it would not switch back on, with the following readings:- thermal cut (NO continuity) and 2 elements in heater can (11.7 & 15.2 ohms) plus solenoid valve (4.5 ohms).

Based on the above is the thermal cut out faulty, or could there be a problem with the heater can overheating? These were replaced less than 2 years ago. Assume even though the ohms has increased on the solenoid valve as its above the 3.5 ohms that’s ok?

Thanks Paul

Answered 7 years ago by Paul Robinson

The solenoid would appear to be the faulty part.

Answered 7 years ago by Anonymous

ok thanks, but would you not still expect to see continuity on the thermal cut out?

Answered 7 years ago by Paul Robinson

If you test the TCO right after you have switched the shower/power off then there may not be any continuity until it has cooled down.

Answered 7 years ago by Anonymous

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