HVAC system not working

Tiny
MIKE READING
  • MEMBER
  • 2002 DODGE RAM
  • 3.7L
  • V6
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
I disassembled the dashboard to replace heater core. The HVAC system worked before I took it apart, but now the whole system is dead. It looks like all connections are together and the fuse for system is okay. The light for showing A/C on/off lights up and goes off when pressed but nothing works. I had to disconnect the A/C lines to remove heater box. Would being low on Freon make the system inoperable? I tried to put Freon in but it only took about half a can the lines got frosty but the system didn't work. The switch for air direction doesn't work, fan doesn't work. Seems like no power to blower switch. Would you know the color code for fan switch wire? Thanks, Mike
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Wednesday, October 23rd, 2019 AT 3:08 AM

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Tiny
ASEMASTER6371
  • EXPERT
Good morning,

Let us start with basics.

I attached a diagram for you to view. Check for power in the highlighted wire. Let us verify power to the control head.

Roy
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Wednesday, October 23rd, 2019 AT 4:50 AM

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