Vaillant Ecotec pro pump failure

[Agile]

You need to check the shaft is turning when the system is filled and powered.

The vaillant badged pump is usually a Grunfoss.

To check the capacitor you need to measure the value on a meter, usually 2.6 µF.

But see the FAQ on this site for the "finger test" on the pump.

Tony

 

[ANDKAT]

How do I check the shaft when the system is filled? when I undo the front screw it releases the water

 

[Agile]

You manage the water for a few seconds with a cloth or towel.

Tony

 

[ANDKAT]

Ok
Thanks i'll give it a go

 

[Jezmunkeh]

Hi all, it seems our Ecotec Pro's pump has expired. Funny as its only appox 3 and a half years old! After getting in the shower, and turning it on, I got no hot water, so off up into the loft I went. Took the cover off, fired up the water to hear the pump making a noise like it was chewing itself! So after having a read up on this post, I've noted that its a Vaillant badged pump, which looks alot like the Grundfos in the old boiler, only the head on the Vaillant is silver and not red. I'm just not sure of the exact head to buy, as there does not seem to be any part numbers for comparison!

Any help greatly appreciated!

Jez

 

[joop1977]

 

[Beerlover]

The pump in your boiler is a Wilo, Vaillant now fit a grundfos version -Part number 178983 costing about £90

Easy job, check the AAV and water quality as this may have taken your pump out. But then again 3 1/2 years for a Wilo ain't bad.

Cheers

PS your pressure sensor may be faulty and has a llowed the pump to run dry (0020059717) check it reads less than 0.2 when the system is drained.

Cheers