Pump runs continuously

[artis]

Hi, my central heating pump has recently started making a noise. I keep removing the screw in the centre, to bleed it, sometimes I get air out, sometimes just a little water. I have also tried bleeding the radiators.

The thing is, I have noticed that the pump seems to be on continuously, even when the heating & hot water is off on the programmer. The room thermostat is also down low.

Is there a thermostat somewhere that should be turning the pump on & off. ie the one on the hot water tank or one in the boiler.

My boiler is a Glow Worm Fuelsaver F.

Thanks

 

[corgiman]

I think that boiler has a pump over run thermostat that probably requires replacement

Corgi job really

 

[artis]

Thanks for the quick reply. I think I have some info on the boiler in the loft, I'll have look tomorrow.

 

[corgiman]

Thanks for the quick reply. I think I have some info on the boiler in the loft, I'll have look tomorrow.

just be careful

 

[artis]

I have found the servicing & installation manual.

The Glow worm boiler has a combined thermostat & pump overrun, but there is also an overheat cut off. which has a wire going to the thermostat.

Could my problem be the overheat cut-off?

 

[corgiman]

I have found the servicing & installation manual.

The Glow worm boiler has a combined thermostat & pump overrun, but there is also an overheat cut off. which has a wire going to the thermostat.

Could my problem be the overheat cut-off?

does the boiler run? if not then the OH stat has tripped if it does then you need a new stat

Again corgi job

 

[namsag]

When you have no call for heat or hot water and the pump is staying on, does the boiler fire up occasionally too. If so it could be a sticking microswitch in the motorised valve.

 

[corgiman]

When you have no call for heat or hot water and the pump is staying on, does the boiler fire up occasionally too. If so it could be a sticking microswitch in the motorised valve.

good one nams

 

[artis]

When you have no call for heat or hot water and the pump is staying on, does the boiler fire up occasionally too. If so it could be a sticking microswitch in the motorised valve.

The heating & hot water are ok. The boiler doesn't fire up when everything is off. it's just that the pump is on continuously, this could have been happening for ages, it's just that I now notice noise from the pump, which I suspect is air, I'll keep bleeding it to stop the noise, but from what I have found out here, I suspect the thermostat/pump overrun assembly.

As the thermostat doesn't have any gas fittings, only wires. Do I need to get a corgi registered person to fit it?

 

[namsag]

In theory yes because you have to take inner case off which has a seal on it,

 

[corgiman]

In theory yes because you have to take inner case off which has a seal on it,

also it is a control and falls under GSIU regs

 

[artis]

Ok, Thanks to everyone for their advice.

 

[corgiman]

Ok, Thanks to everyone for their advice.

but your going to do it your way anyway