I sent you a PM but here's the ECM for a better price than I can offer and it's free shipping
https://www.amazon.com/Bryant-Carrier-HK52ER156-CONTROL-MODULE/dp/B00QW2RCJ2
Even better here's a replacement motor that has the right PN. Never used one but you saw what my price was for the OEM and you saw the price the tech quoted you. Worth a shot.
https://www.amazon.com/ClimaTek-Upgraded-Furnace-Carrier-HD52AE156/dp/B087SMGG5Y/ref=sr_1_1?dchild=1&keywords=Carrier+HD52AE156&qid=1610372828&s=industrial&sr=1-1
Did I mention that $300 post fee for diagnostics and consulting?
