I have pasted a link to the Bissell ProHeat series carpet extractor repair guide below. This guide is like my Bible when I'm working on these machines, and is EXTREMELY helpful on explaining how, and where hoses and parts go, and possible explanations of problems, and how to fix them.
I hope that this information is helpful to you, it sure is to me. If you did find this helpful, please be so kind and vote my repair helpful by clicking the 4 thumbs up icons in the top right hand corner of the repair. This is what really keeps repair professionals like myself keep coming back and giving free repair advice, we greatly appreciate when people acknowledge our work here. Thank you ahead of time.Bissell ProHeat Repair Manual
Thank you again,