Mira Sport Max 10.8KW Running Cold (Attempted Repair Gone Bad?)

[Jake Ferguson]

Hi there.

Thank you for these forums first off, I have often found the answers I need here without having to post a question which is great, however this time my problem might be a bit bespoke!

So to set the scene I have a Mira Sport Max and it has had a few problems over the last 6 months. Firstly it used to go hot to cold which I sorted by taking off the thermal cut-out and cleaning/sanding. Then in the last few weeks it had developed a whining noise, but I could live with it as we are soon to replace the shower. However, on Monday something gave up and we had to turn the temperature all the way up to get it to be warm/hot.

After previously researching the whining noise and people suggesting the flow valve I assumed this had completely gone so I got a new one. When taking the shower apart it was clear that the thermal cutout had failed and had burnt out (the top plastic bit had popped off and one of the metal connectors had come loose) - I have just replaced this, but I now have the following problem:

NO HOT WATER - when on max the "Overheat" light comes on. When turning hot to cold the pressure changes so something is working but there is absolutely no heat. What could this be? I have tried running without the hose on etc but figure this is all as a result of the original problem or something I have missed putting it back together. Does anyone have any ideas?

Thanks in advance for any help

Jake

 

[PrenticeBoyofDerry]

Sounds like heater tank needs changing!
What age is the shower, maybe time to replace for new.

 

[Jake Ferguson]

We moved in 6 months ago but no idea how old the shower is.....

Seems a bit dodgy for three things to break at once

 

[PrenticeBoyofDerry]

Three things at once, bin time!

 

[Jake Ferguson]

*Potentially* three things

Heater tank doesn't make sense, before I changed the thermal cutout and the flow valve it was giving some heat......

Was hoping I made a silly mistake putting back together

 

[PrenticeBoyofDerry]

OK ignore me then, your symptoms point to flow valve and or heater issue. You say you have installed new flow valve, so next is to look at heater.
Some heat! does not indicate that the heater is performing efficiently! Some heat, seems to suggest maybe it is not!
In my opinion you are throwing good money at bad.
It is impossible to assess if you have made a bad connection or an incorrect one, as you did it and was not being supervised and very likely did not take notes or evidence of how the original set-up was.

 

[Jake Ferguson]

Sorry, I was not trying to ignore or disbelieve you, i'm probably just being over optomistic. I had read another thread where someone had a similar problem after changing a flow valve and it turned out to be a contact that didn't go back together properly. I took photos before taking apart and *think* I put it all back together properly, I was just hoping that someone might have had this very specific problem before

I will be taking your advice later today however if nothing else becomes obvious

Cheers again for replies

 

[Madrab]

TBH without going through it with a multimeter, checking for outputs and continuity it's going to be hard for you to come up with what's wrong and therefore a fix.

As @FiremanT recommends, once it's got to that point then it's time for a new shower

 

[FiremanT]

TBH without going through it with a multimeter, checking for outputs and continuity it's going to be hard for you to come up with what's wrong and therefore a fix.

As @FiremanT recommends, once it's got to that point then it's time for a new shower

????

 

[Madrab]

????

???

Was just trying to point out that unless he can do those types of electrical checks then it's, as you suggested, time for a new shower.

 

[FiremanT]

Sorry, wasn't being weird or moody - I jusdjusdt think you have the wrong guy!

 

[PrenticeBoyofDerry]

???

Was just trying to point out that unless he can do those types of electrical checks then it's, as you suggested, time for a new shower.

Twas me that suggested swap for new!

 

[PrenticeBoyofDerry]

I jusdjusdt think you have the wrong guy!

Officer!

 

[Madrab]

Oh carp ... apols @PrenticeBoyofDerry & @FiremanT , I think I had me rosy coloured glasses on there. Apols guys