Replace a buzzing relays

Discussion in 'General Electronics Chat' started by PJGallagher, Dec 3, 2014.

  1. PJGallagher

    Thread Starter New Member

    Dec 3, 2014
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    Hi there,

    Can I just ask if it was easy to replace a relay switch? I have one that is "buzzing/vibrating" and needs replacing. I've purchased the new relay and was just wondering if I need any special solder due to the AGA's running temperature?

    Many thanks

    Paul
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The information is too vague to give any helpfull advice,
    DC relays very rarely buzz usually the AC variety is prone to this.
    Also it seems you have revived an old thread instead of posting your own?
    Max.
     
  3. PJGallagher

    Thread Starter New Member

    Dec 3, 2014
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  4. MaxHeadRoom

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    There are a few possibilities, the 24vdc coil voltage is low (but I doubt it), the contacts are burnt, the device/circuit driving the relay coil is defective in some way.
    I would check the DC voltage on the board if possible and also the voltage across the coil when energized, for the price it may just pay to replace the relay, as these are a common cause of no element heat etc.
    Max.
     
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  5. PJGallagher

    Thread Starter New Member

    Dec 3, 2014
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    Would I be able to use standard solder when replacing the relay, given it is on a PCB and an AGA has high running temp?

    Thanks for your help

    Paul
     
  6. MaxHeadRoom

    Expert

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    Should be no problem, the board and relays would be the first to suffer if the heat was that intense.
    Max.
     
  7. #12

    Expert

    Nov 30, 2010
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    Yes. If the running temperature was high enough to melt solder, it would have turned the circuit board brown a long time ago.

    max keeps beating me to the answer this week. What's up max? You type with both hands???
     
  8. PJGallagher

    Thread Starter New Member

    Dec 3, 2014
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    Thanks a lot Max - much appreciated...

    AGA wanted to charge over £600 to replace the control boards, and if I am lucky a £3 relay will hopefully fix the issue ;-)
     
  9. MaxHeadRoom

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    I have a faster I.S.P. !:p
    Max.;)

    BTW OP your (and mine) original post was moved on its own after my comment .;)
     
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  10. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Moved where? It seems to be tacked on to the end of a 3-yr old thread.
     
  11. cmartinez

    AAC Fanatic!

    Jan 17, 2007
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    We'd need the original relay's specs, or at least a picture, to help you out. Also, most relays are mounted on a special base/socket that makes it easy to remove without the need of soldering.
    Max is right, the AC kind of relay is prone to buzzing, but if it's a DC type, it could mean that the relay's coil is not getting enough current... could mean a damaged transistor or intermittent contact on the PCB... but let's start with the specs first...
     
  12. MaxHeadRoom

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  13. MaxHeadRoom

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  14. #12

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    Last edited: Dec 3, 2014
  15. PJGallagher

    Thread Starter New Member

    Dec 3, 2014
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    Sorry all, my fault - tagging onto the end of an old thread - will let you know how it goes with the relay being replaced

    Paul ;-)
     
  16. cmartinez

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    And here's your relay.
    Again, if after you change it it's still buzzing, check for the transistor or the signal to the transistor that's feeding its coil.
     
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  17. cmartinez

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    Thanks #12, I've moved my conversation to the original thread
     
  18. cmartinez

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    BTW, I suggest you get yourself one of these to do the job...
     
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  19. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    I moved the posts from the other thread again here as he continued the hyjack.
    I have closed the other thread to avoid it happening again.

    The posts will appear in timeline order.

    Bertus
     
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  20. #12

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    Thanks, bertus. That was getting very confusing!
     
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