Cleaned and checked gas boiler. inspected, cleaned heat exchanger. Checked flue venting. Cleaned burners & pilot assembly. Checked pressure Checked voltage & amp draw of pump and found pump motor locked up! Needs new pump. Found gas order at boiler. Located leak source: corroded pilot tubing! Picked up new and replaced pilot tubing and fittings. Reinstalled pilot into boiler. Also found gate valve on supply side leaking. Work suggested: replace circulator pump and Leaky isolation valve: see estimate. Wants repair done Tuesday if possible.