summit's post shows he/she has the ability to see the problem from the customer's point of view. Marge probably can't tell the difference between a contactor and a zone valve, nor should she. If she had been told the problem could happen again and was offered a "fix" with a closed contactor she probably would have bought it and this thread would never have been started.
People like Marge rely upon the "pro" to solve and anticipate problems.
I've read the entire thread. Did you? If you did, did you really try and understand it from her point of view?
Well,if you did in fact read the entire novel you would have seen that I've been in this comedy of errors right from the start. Here's Marges apology. I'm truly sorry that you can't understand that ants can and will invade you unit . OK are you happy now ? That's all your getting from me .