AM broadcasts can be received at greater distances than FM broadcasts. This is because AM radio waves are transmitted at low frequencies. These long, low frequency radio waves can follow the curvature of the earth rather than travelling straight out into the atmosphere. In addition, they curve around obstructions so that they can provide better signal coverage.
Kia Cee'd JD Service Manual: Repair procedures
Inspection
[System Inspection]
1.
Disconnect the vapor hose from the throttle body and connect a vacuum
pump to the nipple on the throttle body.
2.
Check the following points with applied vacuum using a vacuum pump.
...
Kia Cee'd JD Service Manual: Evaporator Core Repair procedures
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the heater & blower assembly.
(Refer to Heater - "Heater Unit")
3.
Separate the blower unit from the heater un ...