[annamarc]

I have a tankless hot water heater. The pilot light is not lighting. I had run out of propane, which was delivered yesterday evening. When I went to use hot water, I still didn't have any. I ran out before and did not have to do anything to get hot water back. Is there a part I should replace? What are the common issues when a pilot light is not lighting?

[mygirlsdad77]

Cycle the power on a off until the propane reaches the heater. It may take a few times or many times before the gas gets to the unit.

[Fr_Chuck]

There is now air in the gas line, it needs to be bleed out before it will light, There should be instructions on the unit ( or in the manual) on how to do that with your unit.