How to re-lite pilot lite on gas heater.

Turn the knob on the gas valve to "pilot", then press on it. Light the pilot with a match or lighter.
You will need to hold the knob in for a few seconds while the thermocouple reads the flame. If it takes longer than a minute, then you may need to tighten on the thermocouple or replace it.

Once the pilot is lit, and stays lit with your finger off the push valve, then turn the dail to "on". The heater should kick in.