Heater core
- Thread starter Tdc
- Start date
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SilverStreak88
Senior Member
- Joined
- Jul 20, 2015
- Posts
- 3,950
- Reaction score
- 1,610
- Location
- Houston, Texas
- Ram Year
- 2007
- Engine
- 5.7 Eco Gasser
Air locked, you posted a thread already about this?
SilverStreak88
Senior Member
- Joined
- Jul 20, 2015
- Posts
- 3,950
- Reaction score
- 1,610
- Location
- Houston, Texas
- Ram Year
- 2007
- Engine
- 5.7 Eco Gasser
Sorry, someone should chime in from your gen area and help you.
dapepper9
Senior Member
- Joined
- Feb 7, 2013
- Posts
- 5,906
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- Location
- Iowa/Nebraska Border
- Ram Year
- 2001
- Engine
- 5.9L V8
Blend door working? If it's stuck in cold positing yout will not get heat.
Turn the key to on but don't start the truck. With the radio on 0 and fan speed on 1 but a vent selected, go from hot to cold and hot to cold with 1 second pause between each temp. Listen for blend in dash moving. Should just be a light buzz sound. If you don't hear anything it may be stuck. If you do hear it, continue moving the selector for a minute or 2 and exercise it a little. Sometimes they just gum up and need worked out.
Also make sure you don't have air in the lines. Jack passenger wheel up with engine running, rad cap off.
Turn the key to on but don't start the truck. With the radio on 0 and fan speed on 1 but a vent selected, go from hot to cold and hot to cold with 1 second pause between each temp. Listen for blend in dash moving. Should just be a light buzz sound. If you don't hear anything it may be stuck. If you do hear it, continue moving the selector for a minute or 2 and exercise it a little. Sometimes they just gum up and need worked out.
Also make sure you don't have air in the lines. Jack passenger wheel up with engine running, rad cap off.
