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Potterton Suprima 120L
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paragp
Posts: 297 Forumite
I have Potterton Suprima 120L boiler. This was installed 4 years ago and has been working fine upto a couple of weeks ago. Now it seems that the hot water comes on ok how ever the central heating does not weem to come on at all. When I switch on the heating, the light on the timer comes on as normal how ever the boiler does not fire. At first I thought this was because the temp in the house was high however i raised the temp on the thermostat and still nothing, the boiler just does not fire for the heating.
Can anyone tell me what i need to do/look for to try an sort this problem out.
thanks
Can anyone tell me what i need to do/look for to try an sort this problem out.
thanks
0
Comments
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It could be that the room thermostat is not working or broken, or there is a break in the wiring.
This is the first thing I would check.Behind every great man is a good womanBeside this ordinary man is a great woman£2 savings jar - now at £3.42:rotfl:0 -
The first thing to check is whether your motorised valve is operating as it is this that fires the boiler.
If it isn't then check the room thermostatl. If it is, then suspect that the microswitches are not making contact.
Better yet, get a heating engineer in to fix it.0 -
the boiler is firing for the hot water just not he heating...
the thermostat seems to be working as if i turn the dial to over the room temp then there is a click in the thermostat...
could it be that the timer unit is become faulty .....0 -
Check the motorised valve.0
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hi EliteHeat,
can you tell me how to check of the motorised valve is functional, are there any checks that I can carry out?
thanks for your help0 -
these are the two valves i can find and the top one seems to be the one that fires when the hot water is turned on.. so i am guessing the the bottom pic is the valve for the heating...
they both have a lever on the other side with "Auto" on one side and "Man" the other side of the lever, they are both on the auto side.0 -
When both the heating and hot water are off both valves will return to their naturally closed position. You can check this by manually operating the actuator arm - you will feel a very firm resistance as you manually open the valves.
Now turn the hot water on via your programmer and observe the behaviour of the relevant valve. It will slowly open and when fully opened the pump and boiler will start. This is the bit of your system that is working OK.
Now do the same thing with the heating. One of two things will happen. Either the valve will not open, or it will and the pump & boiler will not start.
Let us know which one it is.0 -
ok, the hot water valve seems to be opening, can here the boiler kick in, although the actuator arm did not actually move however it was no offering much resistance when the hot water was on.
with the heating valve, turned it on using the programmer and the boiler did not kick in, the actuator arm did not move on its own as above but it was still quite difficult to move the actuator arm.
i am guessing that the actuator arm does not actually move when the valve opens, maybe internally the valve is open and hence the free movement of the actuator arm.
what next....0 -
The actuator arm will not usually visibly move, but you can tell if it is open or closed by the resistance or lack of it when you yourself move it. So, you still need to determine if the valve is opening or not.
If you have a multi meter and are competent with 230v electrics I can tell you how to diagnose what the fault it.0 -
The actuator arm will not usually visibly move, but you can tell if it is open or closed by the resistance or lack of it when you yourself move it. So, you still need to determine if the valve is opening or not.
If you have a multi meter and are competent with 230v electrics I can tell you how to diagnose what the fault it.
the heating valve's actuator arm has the same resistance regardless of whether it is switched on or off from the programmer. So i don;t think the valve for the heating is opening.
I do have a multimeter so if you can tell me how to diagnose the fault with it I would be really greatful.0
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