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[cctopcat]

HI,
I've been running a panel with 3 SYL-2352 PIDs for about 6 years.  I recently upgraded the 2 element control PIDs to DSPR-300 EZboils.  When they are running at 100% power all is well but when turned down the pulsing makes the lights in the room flicker.  Separate circuit but same breaker panel.  Any ideas on possible causes or what I might check?  Thanks!

[Kkane]

May I know how old is your house and the electrical wiring?

Based on your description, it could be caused by inductive & capacitive interference in your wiring/system. If you have any inductive or capacitive loads running in your system under the same circuit, it may cause this issue. You can try to use a different power outlet/subpanel to power your heating element, to see whether it fixes this issue or not. You may need to consult with your electrician for help.

[cctopcat]

Thanks for the response.  It is in a 10 year old garage addition with a separate sub panel, fed with a 100 amp feeder from the main panel.  There is a clothes dryer and AC unit on the sub panel as well as several other circuits.  I believe the only other appliances running at the time were 2 refrigerators.  The control panel is fed from the sub panel by a dedicated 50 amp circuit to a spa panel.  I guess I'll have to put the PIDs back in and run another test.