The heater and air conditioner does not blow any air when it comes on

Test for blown fuse first - otherwise seek *hands-on* assistance from qualifying personnel that has testing savvy / equipment.

Agree with Pushrod. Possible causes of failure would be: wiring and/or connection to the blower motor, the blower motor itself, relay, resistor, switch. A somewhat simple system compared to vehicles of 2021. www.repairpal.com/repair-shops