Noise issue? X10 stopped working

[Hugh W]

I have had a working X10 system for external lights for several years.
We just got a second oven installed that required a new breaker (20amp double pole).
Since then the lights stopped working.
I tripped the circuit breaker yesterday and everything started working again.
Not sure why the oven would break my system.
Can anyone offer a suggestion?
The interface is a CM15a

[Dan Lawrence]

It's possible the new oven is to blame.  Either it puts noise on the powerline (a distinct positive given when you tripped the breaker X10 started working).   You probably need a filter on the circuit the oven is on.    Do a search here for filters and see what's usable.  You will need to have the power draw amount to get the right filter.

[dave w]

Not sure why the oven would break my system.
Can anyone offer a suggestion?
The interface is a CM15a

Most likely it uses a (noisy) switching power supply for the electronics. You might try an XPNR (X10Pro.com) since it wires across the load and not in series, like most filters. Also do you have a repeater? Sometimes they can boost X10 signal above the noise.

[Hugh W]

Thank you - I will attempt to find a Filter.  I do not have an extender, I do have a Coupler/Repeater that I did not install since prior I did not need it.  (No spare slots in the circuit panel now)

[Hugh W]

Solved - I swapped the two HOT wires on the Circuit breaker.  Everything started working again.

[Noam]

So whatever was putting out the noise is on the OTHER phase from the affected modules, most likely.