Grundfos 15 50 Water Pump

[davidleighd1]

Recently I had my oil fired C/H boiler serviced after which it was run up for a few mins and all seemed in order.
However, today I run the system up for real and have found that the rads are not getting hot and on checking the water pump, which was only replaced last year, it appears to have seized up as I am unable to turn the rotor.
The system has not been powered up since April, apart from the 2 minute power-up following the boiler service,so is this likely to be a contributory factor to the problem?
Not sure whether the guarantee will cover the pump in this circumstance.
Any comments would be welcome.

 

[DeltaT2]

The 15/50 is a great wee circulation pump & will last for years.

First thing you can try & this is not a joke; turn on your central heating & give the pump a few sharp blows with a rubber mallet. Of course this is just a temporary fix and the pump needs cleaned.

Failing that you can always 'clean the can' of the pump. I think(?) Tomplum has a video on this.
HTH

 

[Agile]

Not sure whether the guarantee will cover the pump in this circumstance.
Any comments would be welcome.

Pleaase be aware that a boiler service is not breakdown insurance and does not provide any guarantee against breakdowns.

The reason for the failure is primarily yours because you did not run the system regularly say every week.

Heating pumps need to be turned every few days otherwise they are likely to seize up.

Usually they can be freed, either just with a screwdriver in the end or by removing the head and turning the impeller by hand.

Tony Glazier

 

[DeltaT2]

Do you have a full service contract for both your boiler & system Dave?

 

[davidleighd1]

Do you have a full service contract for both your boiler & system Dave?

No! I thought the contract was for the full system but have just been informed that the contract is for the boiler only.

Anyway from the comments you gave I have a good idea now what to try and especially seeing that video from Tom Plum showing the freeing of a seized up water pump .
I'm hoping that will solve the problem so will let you know tomorrow.

Many thanks again for all your help.

Dave

 

[DeltaT2]

Do you have a full service contract for both your boiler & system Dave?

No! I thought the contract was for the full system but have just been informed that the contract is for the boiler only.

Anyway from the comments you gave I have a good idea now what to try and especially seeing that video from Tom Plum showing the freeing of a seized up water pump .
I'm hoping that will solve the problem so will let you know tomorrow.

Many thanks again for all your help.

Dave

Ach that's a shame Dave, but hey I hope you get it sorted mate.

To be honest, and I'm saying this as a close personal friend of Tom, am not sure he shows the actual cleaning of the can? I've not viewed that video for some time.

Oh & by the way, I always charge for 'sharing the dark arts' Dave, so if you get sorted, please stick a fiver in a kids charity box - next time you pass one....Most of us won the lottery when we were born into a good family & great parents, I wish it could be the case with all kids.
Thanks Dave.

 

[davidleighd1]

Not sure whether the guarantee will cover the pump in this circumstance.
Any comments would be welcome.

Pleaase be aware that a boiler service is not breakdown insurance and does not provide any guarantee against breakdowns.

The reason for the failure is primarily yours because you did not run the system regularly say every week.

Heating pumps need to be turned every few days otherwise they are likely to seize up.

Usually they can be freed, either just with a screwdriver in the end or by removing the head and turning the impeller by hand.

Tony Glazier

Had tried to move the impeller Tony and it seems locked solid although I had to try with a number of different screwdrivers as I was never sure if they were in the slot properly.
Anyway I am fairly confident that the impeller has seized up so I will remove the head tomorrow and try and free it.
Thanks for your help, it was much appreciated Tony and also for the info. about running up the system periodically which should help prevent this problem arising again .

 

[davidleighd1]

Do you have a full service contract for both your boiler & system Dave?

No! I thought the contract was for the full system but have just been informed that the contract is for the boiler only.

Anyway from the comments you gave I have a good idea now what to try and especially seeing that video from Tom Plum showing the freeing of a seized up water pump .
I'm hoping that will solve the problem so will let you know tomorrow.

Many thanks again for all your help.

Dave

Ach that's a shame Dave, but hey I hope you get it sorted mate.

To be honest, and I'm saying this as a close personal friend of Tom, am not sure he shows the actual cleaning of the can? I've not viewed that video for some time.

Oh & by the way, I always charge for 'sharing the dark arts' Dave, so if you get sorted, please stick a fiver in a kids charity box - next time you pass one....Most of us won the lottery when we were born into a good family & great parents, I wish it could be the case with all kids.
Thanks Dave.

Most certainly, I will be happy to do that my friend and irrespective as to whether I fix the pump or not.

A real pleasure

 

[davidleighd1]

Recently I had my oil fired C/H boiler serviced after which it was run up for a few mins and all seemed in order.
However, today I run the system up for real and have found that the rads are not getting hot and on checking the water pump, which was only replaced last year, it appears to have seized up as I am unable to turn the rotor.
The system has not been powered up since April, apart from the 2 minute power-up following the boiler service,so is this likely to be a contributory factor to the problem?
Not sure whether the guarantee will cover the pump in this circumstance.
Any comments would be welcome.

Just to let you know that my pump is now up and running and I didn't need to take the impeller out as after giving it a final try this morning and another tap on the pump casing with a hammer and also tapping the end of a screwdriver which was placed on the screw? the pump freed itself and the impeller turned freely.
I powered up the boiler and turned the C/H on and lo and behold the rads all heated up. Magic !
I have decided therefore not to dismantle the pump but to monitor the operation for a while and see how it goes.

Many thanks for the expert help given from other DIYnot forum users, particularly Tom (Glazier) and Delta T2 and to let you know that £10 is on it's way to Children in Need.

 

[DeltaT2]

Thanks Dave your a Gent..............
I'm so glad you got sorted.
Regards
Tricky Dickie Puller

 

[davidleighd1]

Thanks Dave your a Gent..............
I'm so glad you got sorted.
Regards
Tricky Dickie Puller

Thanks again Dickie and look forward to conversing with you in the future.

Best wishes mate