Constant running pump

[Andyc1970]

Hi,

Please can you help me? I have a baxi Solo 3 Boiler and a Grundfos 15-60 pump, the other night I got woken by a load banging noise coming from my CH I turn off the system until morning,

When I turn it back on the same thing was happening so I turned up the pump to speed 3 to push the air out and it worked.

However, ever since this has happened my CH pump will not turn off unless I turn it off by the Programme or mains also the heating does not seem to be working was well as it used to, I have to turn the speed to number 3 maxi just to warm the down stairs rad, also if i leave the the pump running on speed 2 it warms upstairs rad even though the rad thermo is off.

Can you help me or at least steer me in any direction

 

[seco services]

have you two of these

or one of these

be near the pump

 

[BingoBongo]

check your motorised valve as this can cause the symtems you have described.

i would turn the pump back to 1or2 as you will most lickley be adding air to your system and causing future problems

 

[Andyc1970]

HI BingoBongo

I have two of them the top one (is that the two way valve)?

 

[seco services]

check the heating one.
maybe jammed open or the micro switch is stuck inside.
their is a lever on the end does it have resistance if you try to push it across ?

 

[Andyc1970]

check the heating one.
maybe jammed open or the micro switch is stuck inside.
their is a lever on the end does it have resistance if you try to push it across ?

No it moves freely back and forth, however I have even taken this off for several hours from the valve and the problem still accures.
When I move the lever should the back part where it attaches to the valve move around?

 

[seco services]

No it moves freely back and forth,

that tells me the valve is jammed open.

however I have even taken this off for several hours from the valve and the problem still accures.
When I move the lever should the back part where it attaches to the valve move around?

whats the make of the valve ?

 

[Andyc1970]

No it moves freely back and forth,

that tells me the valve is jammed open.

however I have even taken this off for several hours from the valve and the problem still accures.
When I move the lever should the back part where it attaches to the valve move around?

whats the make of the valve ?

Pass I will have to check when I get home tonight, all I can say is it has a blue case

 

[seco services]

did you unclip the whole top part of the valve off the brass body ?

 

[Andyc1970]

did you unclip the whole top part of the valve off the brass body ?

Yes

 

[seco services]

the motor unit itself in the blue part can be still jammed or microswitch faulty even though you removed it. thats where the wires etc connect and
if jammed will still give out a signal to fire the boiler.

on the brass body their is a spindle that the top part sits on check that that moves ok.

the lever on the end of the valve should have resistance when the valve is closed.

 

[Andyc1970]

the motor unit itself in the blue part can be still jammed or microswitch faulty even though you removed it. thats where the wires etc connect and
if jammed will still give out a signal to fire the boiler.

on the brass body their is a spindle that the top part sits on check that that moves ok.

the lever on the end of the valve should have resistance when the valve is closed.

Hi ya
Yes the spindle on the valve moves ok a quarter of a turn and yes there is some resistance on the lever of the motor valve when I push it to one end it comes back

 

[seco services]

sounds like the micro switch is stuck then

 

[Andyc1970]

sounds like the micro switch is stuck then

Thank you very much for all of your help I will buy a new one tomorrow.
Thanks agin

 

[seco services]

have a poke around with it first.