Ive got a reddy heater pro 155 when you turn it on

Are you sure it is running too rich? Your eyes will also burn if it runs too lean because the hyrocarbon and nitrous oxide balance is off. If too rich, there usually is a smokey vapor that is emited, whereas too lean does not create any seeable vapor.
If youhave a little tech to you, you can over-ride the control board and have the power go directly to the burner (as is in the older burner models). If you get the same results, then you'll know itis not the control board. Goodluck,Macgivor