Had do turn down quite a few carpet cleaners over the years.
I did make a mistake a few years ago some one slipped under the door.
Got a call one morning very early
" hey that vacbooster does not work had it connected to the truck mount and it does not suck very good, I asked did you have it plugged in and turned one, YES I DID HOW STUPID DO YOU THINK I AM? Get a call back oh I left the dump valve open everything is fine.
The JAGUAR MX-2 ETM @ cross-american.com