For this specific motor code 4

using an OEM HVAC motor like the S1-FHM3728 is critical for maintaining the programmed static pressure and airflow profiles of the original equipment

Can this unit replace an R7847A1066

erratic blower operation

Amana-Goodman 0275P00066S Heat Element Kit 328140-751 For this specific motor codeThe Amana Goodman 0275P00066S Heat Element Kit is a high performance 5kW OEM replacement designed to restore the electric heating capabilities of your residential or commercial HVAC system. Engineered by Goodman Amana, this 0275P00066S heating element serves as a direct genuine replacement for multiple legacy parts, including 0275P00021, 0275P00039, and 0275P00066. Operating at 208 230V, this 5 kilowatt kit ensures consistent thermal output and energy