I never heard of anyone having to replace Q1 or a Rectifier on a Raymond board.
I can't say for sure, that if you replace those parts that you'll end up fixing that code 23.

You might have a bad Transisitor, behind the Circuit Boards.

They're not easy to access.

If the Rectifier or Q1 are easier to access, then you can start with those.

If you don't have a Code 23 Diagnostic Procedure, I can send it to you via email.