Boiler no heat call, customer stated the pilot went out. She couldn’t get it to relive. When I arrived, she had the pilot going then, but it would not lite all the way. I found gas valve was not set all the way to the on position. System ignited. However after inspection found thermocouple was very burnt up. Replaced part. Cleaned out boiler. Both pumps are pumping, chimney is open and boiler is fully on now.