“When I had my new boiler installed the first thing I did was buy this part to keep on hand in case it went bad during the weekend or at night. A couple of weeks ago during a cool spell on a sunday night I noticed the house was getting cold and found out that the boiler was not working. I called in a service tech and he found that this part was bad, and told me I was lucky I had this on hand because it wasn't a part he carried in the truck and he would of had to order one Monday morning.”