I would just like to say

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guineafowl21 said:
All fine here, thanks. I’d forgotten what warm weather was, until a few days ago!


What’s the exact fault with your stats? Looks like a fairly simple circuit. You might be getting voltage surges, especially with stormy winter weather, so an SPD might be in order.

LM56 most likely candidate, and cheap as chips. Probably quicker to swap in a new one and see, than to poke around diagnosing.

www.elprocus.com

Electronic Thermostat : Circuit Diagram and Its Working

This Article Discusses about Electronic Thermostat Circuit Working, Types of Thermostat and Its Applications. Most Thermostats used to Save Energy at Home
www.elprocus.com www.elprocus.com
View attachment 316226
Click to expand...
Thanks for this!
First question, without gooogling it, what is a SPD please. Surge protection device? As we have a stat like this in all rooms, in the hall and on the upstairs landing, how could I plug one in to all of them without them being obtrusive?
Anyway, as 3 of them are still working and have done so through countless storms I am not going to go there for the moment.
Upthread I have been chatting with @gstuart about this as he is a retired heating engineer and he is helping me try to sort out how to wire in a cheap bimetallic stat to get around the weaknesses of the electronic ones.
The problem being that the existing ones are 3 wire (or 4 wire, if you count the "pilot wire" which doesn't seem to do much as it isn't connected to a central programmer or timer). And the one I bought, (still €35) is two wire. It seemes to be very hard to buy cheaper simple 3 wire ones. In the end I may have to bite the bullet. He and I are emailing about this and he is looking into it for me.
So my remark to you was jocular really, but I am open to any suggestions and will deffo open the link you put up and try to understand the circuit diagrams. My O level in Physics taken in 1970, and my knowledge of wiring up kit cars being about the top of my level.
But I do think I could replace capacitors on PCBs which seem so often to be the problem.
Anyway!
Cheers for the interest and I'll let you know how I get on!:):):)
Replacements with the inevitable later models complete with LCDs, extra unwanted stuff, etc come to €60 EACH and I need 7!
I have had to buy 2 already and yes they work fine so this proves it is the stats and not the rest of it.

If you have been looking upthread you'll note that these control separate electric heating elements under each floor of each room etc.

If it was just one for the whole house I wouldn't even have mentioned it!
They fail by basically just clicking on-off, on-off over and over again, the red light indicating that heating is on flashing in time, on-off, on-off.
 
Stanleysteamer said:
Thanks for this!
First question, without gooogling it, what is a SPD please. Surge protection device? As we have a stat like this in all rooms, in the hall and on the upstairs landing, how could I plug one in to all of them without them being obtrusive?
Anyway, as 3 of them are still working and have done so through countless storms I am not going to go there for the moment.
Upthread I have been chatting with @gstuart about this as he is a retired heating engineer and he is helping me try to sort out how to wire in a cheap bimetallic stat to get around the weaknesses of the electronic ones.
The problem being that the existing ones are 3 wire (or 4 wire, if you count the "pilot wire" which doesn't seem to do much as it isn't connected to a central programmer or timer). And the one I bought, (still €35) is two wire. It seemes to be very hard to buy cheaper simple 3 wire ones. In the end I may have to bite the bullet. He and I are emailing about this and he is looking into it for me.
So my remark to you was jocular really, but I am open to any suggestions and will deffo open the link you put up and try to understand the circuit diagrams. My O level in Physics taken in 1970, and my knowledge of wiring up kit cars being about the top of my level.
But I do think I could replace capacitors on PCBs which seem so often to be the problem.
Anyway!
Cheers for the interest and I'll let you know how I get on!:):):)
Replacements with the inevitable later models complete with LCDs, extra unwanted stuff, etc come to €60 EACH and I need 7!
I have had to buy 2 already and yes they work fine so this proves it is the stats and not the rest of it.

If you have been looking upthread you'll note that these control separate electric heating elements under each floor of each room etc.

If it was just one for the whole house I wouldn't even have mentioned it!
They fail by basically just clicking on-off, on-off over and over again, the red light indicating that heating is on flashing in time, on-off, on-off.
Click to expand...
Yes, SPD = that. Modern way is to install one in your fusebox for the whole house.

Might be an interesting circuit to troubleshoot, if you want to send one to me. Better still, how about Big Clive on YT?
 
guineafowl21 said:
Yes, SPD = that. Modern way is to install one in your fusebox for the whole house.

Might be an interesting circuit to troubleshoot, if you want to send one to me. Better still, how about Big Clive on YT?
Click to expand...
One for the whole house? that'd have to be a big mutha wouldn't it?
Being a relatively modern house, handed over to us in 2008 as a new build, it does at least have circuit breakers or RCBs or whatever the technical term is, which makes it easy to isolate the heating circuits, more or less, although for instance one of them covers the landing, bedroom and walk in wardrobe, each of which has one of these wretched stats on it!
I am going to photograph all sides of the unit. It comes apart and there are two PCBs. one in each half, I'm not sure I can get to the underside of one easily or at least without doing further damage. I've been meaning to do this to send the pics to Gary anyway.

Big Clive?
Again, I'll have to look for him.
Put it this way, my ornery £10 Digital multi meter is OK-ish but it doesn't have the capacity to measure capacitance so I have no easy way of testing one, although I have read up on how to do it with "resistors of know value" etc.
Maybe I'll look at buying one that can measure it. I think I am going to have to sacrifice one of the dud ones and take it apart competely, once I know how to, and have all the gear to, test all the components, then I'll have more of an idea, although I have no idea how to test a "chip".
Sadly I don't have a circuit diagram to send you. If I had I'd be sending it to anyone who has expressed an interest!
They are called "Delta Dore Minor 10" if that helps. Neither Gary nor I have been able to find a circuit diagram for one.
And once again thanks for your interest!
Just to say, here is a thread i doscoverd sadly in French but which shows that huige numbers of people have problems with this particular stat!!!

Problème Delta Dore Minor 10

Bonjour, Ma maison est équipée d'un plancher chauffant électrique. Les thermostats sont des delta dore minor 10. J'ai 5 thermostats et deux ne
forums.futura-sciences.com
And yes a lot of them bang on about it being down to a capacitor.
(When I search even in English over here, on Google, the answers come up in French!)
 
Stanleysteamer said:
Even Michael Fish wasn't a very good Michael Fish, at least once!
Click to expand...
That Michael Fish wuz best Fish of orl. “No tornado” wuz bess foreskin im ever made. Iffn he’d told the trufe, undreds wuddve died (tryin tu escape, tyin doan shed roofs, geddin up ladders). Ee were told tu say that and thank godd ferrit. 15 dead in ole orrible event.
 
Camper all done ready for MOT in September
Selling before that though, just wanted it to be as good as it can be :) Pic of under rear (oiled) where they usually rust out.
All underneath painted black
Packing van now for Llandudno transport show, going tonight after the rush
Takin brolly just in case :cool:
 

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Stanleysteamer said:
One for the whole house? that'd have to be a big mutha wouldn't it?
Being a relatively modern house, handed over to us in 2008 as a new build, it does at least have circuit breakers or RCBs or whatever the technical term is, which makes it easy to isolate the heating circuits, more or less, although for instance one of them covers the landing, bedroom and walk in wardrobe, each of which has one of these wretched stats on it!
I am going to photograph all sides of the unit. It comes apart and there are two PCBs. one in each half, I'm not sure I can get to the underside of one easily or at least without doing further damage. I've been meaning to do this to send the pics to Gary anyway.

Big Clive?
Again, I'll have to look for him.
Put it this way, my ornery £10 Digital multi meter is OK-ish but it doesn't have the capacity to measure capacitance so I have no easy way of testing one, although I have read up on how to do it with "resistors of know value" etc.
Maybe I'll look at buying one that can measure it. I think I am going to have to sacrifice one of the dud ones and take it apart competely, once I know how to, and have all the gear to, test all the components, then I'll have more of an idea, although I have no idea how to test a "chip".
Sadly I don't have a circuit diagram to send you. If I had I'd be sending it to anyone who has expressed an interest!
They are called "Delta Dore Minor 10" if that helps. Neither Gary nor I have been able to find a circuit diagram for one.
And once again thanks for your interest!
Just to say, here is a thread i doscoverd sadly in French but which shows that huige numbers of people have problems with this particular stat!!!

Problème Delta Dore Minor 10

Bonjour, Ma maison est équipée d'un plancher chauffant électrique. Les thermostats sont des delta dore minor 10. J'ai 5 thermostats et deux ne
forums.futura-sciences.com
And yes a lot of them bang on about it being down to a capacitor.
(When I search even in English over here, on Google, the answers come up in French!)
Click to expand...

Hi mate

Finally tracked down the minor 10 wiring diagram

IMG_0884.png
 
Stanleysteamer said:
Thanks for this!
First question, without gooogling it, what is a SPD please. Surge protection device? As we have a stat like this in all rooms, in the hall and on the upstairs landing, how could I plug one in to all of them without them being obtrusive?
Anyway, as 3 of them are still working and have done so through countless storms I am not going to go there for the moment.
Upthread I have been chatting with @gstuart about this as he is a retired heating engineer and he is helping me try to sort out how to wire in a cheap bimetallic stat to get around the weaknesses of the electronic ones.
The problem being that the existing ones are 3 wire (or 4 wire, if you count the "pilot wire" which doesn't seem to do much as it isn't connected to a central programmer or timer). And the one I bought, (still €35) is two wire. It seemes to be very hard to buy cheaper simple 3 wire ones. In the end I may have to bite the bullet. He and I are emailing about this and he is looking into it for me.
So my remark to you was jocular really, but I am open to any suggestions and will deffo open the link you put up and try to understand the circuit diagrams. My O level in Physics taken in 1970, and my knowledge of wiring up kit cars being about the top of my level.
But I do think I could replace capacitors on PCBs which seem so often to be the problem.
Anyway!
Cheers for the interest and I'll let you know how I get on!:):):)
Replacements with the inevitable later models complete with LCDs, extra unwanted stuff, etc come to €60 EACH and I need 7!
I have had to buy 2 already and yes they work fine so this proves it is the stats and not the rest of it.

If you have been looking upthread you'll note that these control separate electric heating elements under each floor of each room etc.

If it was just one for the whole house I wouldn't even have mentioned it!
They fail by basically just clicking on-off, on-off over and over again, the red light indicating that heating is on flashing in time, on-off, on-off.
Click to expand...
Sounds almost like they have no "spark/surge-protection".
 
..I have spent hours online trying to find a replacement sink that will fit into our cupboard layout.
Most of the current one's are too big and won't fit. We fancied a vitreous ceramic one in white but they are all too big.
There are composite ones, but she fears they stain all too easily. I have found some that are the right size in Stainless Steel though. Cheap as chips but probably as flimsy as anything. The search continues. :D
 
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