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Buzzing sound coming from switching relay?

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Joseph_4
Joseph_4 Member Posts: 312
in Thermostats and Controls
I have a customer whose R845A (its pretty old) makes a loud buzzing sound. What is the cause of it? Does it need to be changed or is it fine this way?

It is causing the pump to run on a call for heat like it is suppossed to.

Thanks

Joe

Comments

  • billtwocase
    billtwocase Member Posts: 2,384
    noise

    The noise will probably only get worse. There is a way to clean the contacting surface that makes that noise, but you are best to just replace it
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