Recent content by bizzlebest

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    Can Grundfos UPS2 fail slowly?

    Yep cleaned all the magnetite out of the impeller
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    Can Grundfos UPS2 fail slowly?

    Yes it is open vented, I'll have to check this out! Thanks It was solid green on 2, but ive put it on 3 to try and get it round quicker. Putting it on 3 prevents the Vaillant boiler from giving me an F23 error
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    Can Grundfos UPS2 fail slowly?

    Hi there, I have a grundfos ups2 whirring away and it takes ages to warm up the rads in my house, and then only to a lukewarm temperature. When i turn off all the TRVs upstairs to push heat downstairs, the rads down there get hotter, but again they take ages to warm up. The pipes out of 3 way...
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