Clogged Nozzle switching PVA to PETG

[MadDad3535]

See:

How to set filament change and flush temperature to a new value?

The X1 and P1 machines always set the nozzle temp to 250 degrees when doing a filament change and flush. Obviously setting the temp to 250 will flush the nozzle of the most widely used materials, however, Is it possible to reduce this temperature so as not to run into problems when attempting to process lower temperature filaments?

I changed the PETG line to M109 S240 (down from 260) - but the PVA still gets somewhat brown/scorched

I also changed the PVA line to M109 S220 (up from 210) - the Bambu PETG basic was having problems being flushed - it made wierd noises pushing out the PETG (like starting to stick) around 215 but at around 213 the filament was all PVA - with 220, no more noises

I’m not sure how to completely eliminate brown/scorch. Gonna try a cold pull to get the brown completely gone and see if the brown I’m getting was just scorched left overs in the nozzle.