Ideal S24 mini locks out/red light

[MarkGolf]

Hi All,

Been having some trouble with my Ideal S24 mini.

A few months ago, it started to go wrong, the red light would come out and I would need to press the reset button to get it to fire back up, it would only last a few hours if that, eventually it wouldn't fire up.

British Gas came out and after a few hours, the engineer found the issue to be some sort of micro switch, he said he cleaned it up and all was well again.

5 months later, it is erroring again. Only this time, after a reset, it does fire up everytime and lasts for anything from 12 hours to a few days without trouble.

When working, the green light is constantly flashing, I believe this means something is up but the boiler does continue to work, does my hot water and the central heating.

I found that I can flick a dip switch and internally, some other LEDs indicate the issue.
The issue being indicated when the boiler lights up the error/lock out light on the front is, according to the manual;

Faulty DHW temperature probe NTC

The heater knob is set to half way, the temp gauge typically indicates 60-65 degrees

The water pressure gauge, when hot is around 2.5, I have seen it at 3 and drained some water from a rad.

Any ideas what the problem is? Is it something I can have a look at myself? I have the manual but I haven't studied it in depth.

Cheers!

 

[MarkGolf]

Pictures

Pressure not so high now

main green light is flashing 4 times a second

 

[MarkGolf]

Morning all,

Does anyone have any advice?

It’s remained stable over the weekend, seems a higher temp setting keeps it working but I’m sure it will fail again.

Thanks.

 

[shambolic]

You need a new hw thermistor. I’d change the heating one too while your at it.

 

[MarkGolf]

Thanks!

I take it that this will just be a little sensor that bolts inline somewhere (i can read the manual to locate that). I do a lot of DIY on cars so I imagine this will be pretty similar.

Will I need to just turn off the water and quickly swap out?

Cheers

 

[shambolic]

Thanks!

I take it that this will just be a little sensor that bolts inline somewhere (i can read the manual to locate that). I do a lot of DIY on cars so I imagine this will be pretty similar.

Will I need to just turn off the water and quickly swap out?

Cheers

No you will need to drain the water out the boiler then refill.

 

[shambolic]

172496 is ideal part number.

 

[MarkGolf]

Your a star mate, thanks!! That’s exactly what the manual says.

I thought i would just double check the wiring and see the thermister. I looked at the location in the manual and when checking the boiler, there is now DHW thermister, I can see the CH one but there is definitely no DHW one and no location for it.

I then went back to the manual which covers a few different ideal mini’s and I then noticed that the s24 doesn’t have one, so now I’m stumped!!

 

[durhamplumber]

Morning all,

Does anyone have any advice?

It’s remained stable over the weekend, seems a higher temp setting keeps it working but I’m sure it will fail again.

Thanks.

Yes.Put boiler in bin.

 

[shambolic]

Your looking at a manual for the Combi not the system.
So there is only one on the S24 change it.

 

[shambolic]

No 4 on drawing

 

[ianmcd]

And recharge your expansion vessel while you are at it, look in the FAQs on how to do it

 

[MarkGolf]

Hi Guys, thank you!!

I've got BG coming out for a routine service as part of my homecare package so I'll get them to do the recahrge, I think they did this last time around.

I changed the thermister but no difference, the old one was a bit black mind.

I have since got closer to the issue, it seems that giving the tray which holds the PCB's a tap gets the boiler to fire when it initially doesn't.

I pulled the tray out, set the boiler to come on, it makes a whirring sound as normal but when it should fire, it doesn't, so I tap the PCB area and hey presto, it fires up!

There are 2 PCB boards, one of them looks to have 3 relay looking things on and one looks a little black inside on the clear case.

I'm not sure which PCB is the issue but the relay one seems a good start.

looks like this

 

[durhamplumber]

Hi Guys, thank you!!

I've got BG coming out for a routine service as part of my homecare package so I'll get them to do the recahrge, I think they did this last time around.

I changed the thermister but no difference, the old one was a bit black mind.

I have since got closer to the issue, it seems that giving the tray which holds the PCB's a tap gets the boiler to fire when it initially doesn't.

I pulled the tray out, set the boiler to come on, it makes a whirring sound as normal but when it should fire, it doesn't, so I tap the PCB area and hey presto, it fires up!

There are 2 PCB boards, one of them looks to have 3 relay looking things on and one looks a little black inside on the clear case.

I'm not sure which PCB is the issue but the relay one seems a good start.

looks like this

Wasting your money,and time

 

[MarkGolf]

Why?

It's £35 for a refurb PCB and I'm selling the property very soon. No point replacing something that works when a cheap fix is available.