Hi all,
I have seen many posts with some of the symptoms I am experiencing but nothing with my exact issue. I have spent many evenings Googling potential solutions with no luck so now asking the knowledgeable heads on this forum.
I have a Potterton Suprima 50. Moved into a 13yr old house earlier this year and the boiler is original to the build. Has had the PCB replaced about 5 years ago. Seemed to work fine over the summer with heating water but now I am faced with a flashing orange light.
System is a Potterton timer/controller. Suprima 50 boiler. 2 Myson Power Extra valves. Grundfos Selectric pump.
The following happens, for each this is after I have turned everything off at the mains and restarted. CH dial set to 30 degs.
-Timer set to OFF, Boiler Temp dial set to OFF : Solid orange light
-Timer set to ON, Boiler Temp dial set to OFF : Rapidly flashing orange light
-Timer set to ON, Boiler Temp dial set to ON : Slow flashing orange light.
...and it stays like this. It should flash green and then ignite.
Sometimes the boiler does fire up, but this is only after many turns on and off, and sometimes it doesn't fire at all. Sometimes it comes on with the timer but most of the time not.
When it is all set to ON and I expect it to ignite I can also observe the following:
- Motorised valve power light comes on. The MV unit gets hot and there is a very faint buzzing, but this sounds more like just the electrics working than a problem. The fact that it works sometimes, and that it is the same whether I have only HW or CH on leads me away from thinking it is a problem with the valves.
- Can't hear any noise from the pump. Never have heard any noise from the pump that I can remember though.
So, a bit weird that it works sometimes but not all the time. It looks like it is getting the external call for heat (flashing orange light) but just not firing.
Any suggestions on what this might be, or where would be a good place to start looking?
Thanks in advance!
I have seen many posts with some of the symptoms I am experiencing but nothing with my exact issue. I have spent many evenings Googling potential solutions with no luck so now asking the knowledgeable heads on this forum.
I have a Potterton Suprima 50. Moved into a 13yr old house earlier this year and the boiler is original to the build. Has had the PCB replaced about 5 years ago. Seemed to work fine over the summer with heating water but now I am faced with a flashing orange light.
System is a Potterton timer/controller. Suprima 50 boiler. 2 Myson Power Extra valves. Grundfos Selectric pump.
The following happens, for each this is after I have turned everything off at the mains and restarted. CH dial set to 30 degs.
-Timer set to OFF, Boiler Temp dial set to OFF : Solid orange light
-Timer set to ON, Boiler Temp dial set to OFF : Rapidly flashing orange light
-Timer set to ON, Boiler Temp dial set to ON : Slow flashing orange light.
...and it stays like this. It should flash green and then ignite.
Sometimes the boiler does fire up, but this is only after many turns on and off, and sometimes it doesn't fire at all. Sometimes it comes on with the timer but most of the time not.
When it is all set to ON and I expect it to ignite I can also observe the following:
- Motorised valve power light comes on. The MV unit gets hot and there is a very faint buzzing, but this sounds more like just the electrics working than a problem. The fact that it works sometimes, and that it is the same whether I have only HW or CH on leads me away from thinking it is a problem with the valves.
- Can't hear any noise from the pump. Never have heard any noise from the pump that I can remember though.
So, a bit weird that it works sometimes but not all the time. It looks like it is getting the external call for heat (flashing orange light) but just not firing.
Any suggestions on what this might be, or where would be a good place to start looking?
Thanks in advance!