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Grundfos pm1 short cycling

  • 13-05-2017 4:13pm
    #1
    shooter69
    Registered Users, Registered Users 2 Posts: 179 ✭✭


    Hi lads
    Grundfos pm1 shower pump this morning started to short cycle then stop then start again then cuts out (safety feature I believe ) only started this morning . Defo no leaks in cisterns / taps on etc . Pressure vessel charged correctly and I noticed when I closed the valve under pressure vessel (flow out) the pump stops cycling so not sure if return valve faulty or faulty pump - its only 2 years old , any suggestions ?
    Thanks


Comments

  • #2
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    If you have closed the valve on the "outlet" pipe from the pump and the cycling has completely stopped, then you most likely have a drip or leak somewhere on your plumbing system.
    Normal pump problems associated with your symptoms would be the pressure vessel or non-return valves. If it was the non-return valve the cycling would continue with the outlet valve shut.


  • #3
    shooter69
    Registered Users, Registered Users 2 Posts: 179 ✭✭shooter69


    K.Flyer wrote: »
    If you have closed the valve on the "outlet" pipe from the pump and the cycling has completely stopped, then you most likely have a drip or leak somewhere on your plumbing system.
    Normal pump problems associated with your symptoms would be the pressure vessel or non-return valves. If it was the non-return valve the cycling would continue with the outlet valve shut.

    Cheers for that , have searched everywhere and can't find any leaks - all taps are off and it only started mid morning , fine earlier this morning and never happened before -very strange !
    Is there a chance the pump is the problem k flyer?
    Thanks


  • #4
    shooter69
    Registered Users, Registered Users 2 Posts: 179 ✭✭shooter69


    shooter69 wrote: »
    Cheers for that , have searched everywhere and can't find any leaks - all taps are off and it only started mid morning , fine earlier this morning and never happened before -very strange !
    Is there a chance the pump is the problem k flyer?
    Thanks

    K flyer - all sorted the bath tap was slightly on but on shower mode so couldn't see the drip - am I a twat for not spotting it? Yes 😂
    Many thanks for your help sir ðŸ‘


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