Any heating and cooling Guys out there? I have a question

Check Ebay. I would not have waited this long........

Why didn't the so called HVAC guy fix it. WHAT DID HE DO?

Did he check the flame rod current? Position of the rod? Do anything except stand there and say "yup?"

Why didn't he replace it and WHY DIDN'T he have one on the truck?

Ebay, not necessarily the correct ones, check year, make model color, etc etc etc

http://www.ebay.com/sch/i.html?_from=R40|R40&_sacat=0&_nkw=rheem+flame+sensor&_sop=15