Thanks for the Ideas guys.
Checked the resistance at 21.6 ohms, so I am guessing that's close enough.
While checking the PSU, ran into a "small" problem.
How can I test a few amps of load on it?
I thought, simple, just connect the heater cartridge directly across it.
I "probably" should have been testing the 24v side, but no,
somehow I connected it across 115vac.
Turns out the heater cartridge probably worked, as it went from
room temp to white hot in less than a second.
I'll be ordering a new PSU this weekend.
Looking on the bright side, It was probably that anyway
Report back in a few days
I hope it is the PSU and not a MOSFET on the board.