I have a Rheem heater (Model# PROG50-38N RH60). The pilot has gone out. This tutorial suggests I must turn the knob to pilot to start the process of relighting the heater. When I try to turn my knob to pilot, I am unable to do so. Is there any trick to getting the knob into pilot mode? I don't want to break the heater by forcing things.
Below is a picture of the lighting instructions for your water heater taken from Rheem's website. Make sure to follow the lighting instructions carefully and do not skip any steps. This same instruction set should be available as a sticker on your unit.
It looks like you do in fact have to depress the knob in order to turn it so avoid using force.
If you are unsuccessful with the instructions then it is a good idea to call a professional.