APlus wrote:

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When refrigerator starts up it spikes the line and devices get triggered.


** That is extremely unusual - the fridge MUST be faulty.

Where can I find device to put in the refrigerator ac line to kill that
noise ?


** Now you change your story ?

A burst of "noise " is not a voltage drop that can trigger things.

If the thermostat switch has no RC snubber, there is a burst RF noise that can make its way into audio gear as a click or a brief flash or data loss on a TV screen.

IME no plug in device is effective against this.

You need to add or replace the missing/ faulty snubber.


BTW:

Diagnosing your own problem and its cure is not welcome here.

Just describe the problem in detail and leave the rest open.



...... Phil