Start working - the heat may start working again, it didnt 4 me, others it has. How much - if u take it to Ford, shaft around $50 4 part, HIM around $500, labour grrrrrrrrr. U would get quoted over $1000 if it is the HIM. If u do get it done and it is the HIM, suggest while at it to replace the shaft. Others have done it themselves by pulling the dash out, depends on how handy u r.