Quote from Frank in The Wow Factor
Phil: The gas is on, dad. I can see the spark from the igniter. I don't know what it is. Frank: [over video chat] That's your thermocouple. You get a little sediment in there or some rust, and you're done for. Phil: The thermocouple. Of course. Why didn't I think of that? Thanks, dad. I-I shouldn't be buggin' you with this stuff. Frank: Are you kiddin' me? I love to help. Makes me feel like you still need me. Phil: Of course I need you. You're the best when it comes to this.