No cool air...
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New User
Joined: Nov 2010
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No cool air...
Hey I have a 97 supercab 4x4 4.6. Recently my ac compressor went and instead of replacing it I put a "dummy" pulley in its place. I thought the vent would still blow in cool air from the outside. However, when the truck is warmed up it blows really hot air out of the vents on the coolest setting. even if its 50-60 degrees out it still blows really hot air. Am I missing something here?
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Outside air only works in PANEL and FLOOR with the temp control all the way to cooler setting.
If your getting very hot air, the air control flap is not working to divert outside air into the Panel or Floor selection. That means the heater core is being allowed to feed the panel or floor selection.
All other selector functions normally call for the compressor to operate.
Good luck.
If your getting very hot air, the air control flap is not working to divert outside air into the Panel or Floor selection. That means the heater core is being allowed to feed the panel or floor selection.
All other selector functions normally call for the compressor to operate.
Good luck.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Outside air is selected in ALL positions EXCEPT Max A/C and OFF. See the inlet air vacuum motor truth chart in the service manual.
Your temperature blend door is either inoperative or is not properly sealing when in the position for coldest airflow. Check the FAQs in the HVAC forum.
Your temperature blend door is either inoperative or is not properly sealing when in the position for coldest airflow. Check the FAQs in the HVAC forum.
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