Blower fan won't come on... may have shut itself off... filter is past due to change. Is there a reset for blower? Blower will not come on when set to manual fan. Compressor does start up.?

Blower fan won't come on....may have shut itself off....filter is past due to change. Is there a reset for blower? Blower will not come on when set to manual fan. Compressor does start up.????
This is a 1 year old Rheems RBHP... came with new house.