hi joe, in the future, anyone can feel free to call me. cell is 1-602-549-3638. i work for hwh, and live in arizona. i can help.
as you found, some elementary diagnostics of the system help immensely. the first step in any repair is to download a service manual. your particular problem is covered in that manual.
sorry about the reception you got from hwh. that poor girl gets her butt chewed many times a day for something that is not personally her fault. all of us have gone thru it, but not on a daily basis.
i know her personally, and she is not that way. i have heard some of the calls she gets, and i know what cursing and yelling do to a persons feelings. not all owners, but some, resort to that, just because of their own frustration.
im not making excuses, and will not tell her to get another job, just that a little courtesy goes a long ways.
anyway, call me, anytime, i can take it, and i can really help.