On Sep 16, 1:13*pm, hdivr wrote:

snip

Am I missing something here? *Is it possible to force 240v out of
single wire hookup? *If so, how? *Thanks.

Your original GFCI should work OK, so hook up red and black to the
terminals. Of course you can't 'force' 240 V where it doesn't
exist..Recheck your sauna wiring diagram to make sure you don't need
120V for the controls. If so, the neutral must be present at the
heaters controls. HTh

Joe