Luke warm Water and Rads

[teen12368]

Can anyone help.
I have a Ideal Classic FF340 and for the last 4 weeks I can only run a bath with about 6" of hot water then the water runs luke warm
My rads are only luke warm. I have bled them but it has made not difference what so ever.
And my Grundfros pump is on number 3

Can anyone help please

 

[Hugh Jaleak]

Pump definately turning? (Just because it is running doesn't always mean its moving the water.) Adequate water in the system?

 

[teen12368]

Hi

How can I tell if the pump is turning?

 

[Hugh Jaleak]

Undo big silver screw in the top, (dont lose it!), you'll get a dribble of water out probably. Insert a small flat screwdriver, should be able to feel it spinning. Check pipes either side of the pump, are they hot? When you bleed the rads do you get a strong jet of water or next to nothing?

Lastly, the boiler, does it fire and run for a while or fire then almost immediately shut down, or not fire at all?

 

[teen12368]

Thank for the instructions on how to check the pump I will get my son to check later. I think he will have heart attack if he comes in and finds his mum doing this. lol

The boiler does fire up then goes off again after a short while and I am having to click my wall thermostate on to get it to come back on.

am I correct in thinking its all point towards the pump?

 

[Terry7556]

not necessarily if the boiler does not run for long then it wont do its job.when the boiler cuts out does the fan continue to run?

 

[teen12368]

Hi

We have tired to removed the silver screw on the pump and cant move it. If I put my hand on the pump you can feel the working inside moving.

I cant see a fan on my boiler but I can again feel the vibaration of the fan moving if i put my hand on the boiler at the side.


I clicked the thermostate on in my hallway when i came in and the pilot light didn't light it did light when i moved the thermostate on the water tank. The fan was running all the time!!!!

 

[Agile]

I think you may need an engineer!