Why is the woman worried about the washing machine?

W: Tom? Do you think you could come into the kitchen for a second? There’s something I’d like you to look at.
M: What? Just let me finish these books and I’ll be right there.
W: Would you mind coming right away, please? It’s the washing machine. It’s making a funny noise. I want you to listen to it. I’m worried.
M: Oh, no. Not again. (In the kitchen now. )It’s the pump, that’s what it is.
W: I can’t hear you. Let me turn the machine off!
M: The pump isn’t working properly. So what do you want me to do about it?
W: What do I want you to do about it? Repair it, of course. You don’t think I made you leave your work for nothing, do you?
M: But I’m not a mechanic. Why don’t you ring the shop where we bought the thing? Ask them to repair it!
W: Are you sure that’s what you want me to do?
M: Of course, I’m sure! Why do you ask?
W: Because the last time they came you got very angry.
M: Did I?
W: Yes. It was a small question of money. Don’t you remember? The men were only here for half an hour but they still charged two pounds for an hour’s work. You didn’t like that at all.
M: Oh? Hmm...yes, I remember now.