No heat! Need help - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 03-24-2014, 07:35 AM Thread Starter
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No heat! Need help

I have a 2004 6.0 and my heat only works intermittently while driving. I need some help on where to look next. Here's what I've done so far...
-drained and flushed coolant (several several times)
-new radiator
-new heater core
-new thermostat
-new water pump

After fixing all of those I'm still not getting any heat, so I figured I may have a vacuum line issue, but my air doesn't default to defrost. Blend door actuator is rotating so I know it works... But I'm not sure exactly where I should start next. Any help is greatly appreciated.
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post #2 of 8 Old 03-24-2014, 02:24 PM
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Check the heater hoses. There is a vacuum operated shutoff valve inline on one of the heater hoses. Make sure it is seated properly and the line isn't cracked anywhere.

2005 F250 CCSB FX4 6.0
2003 Excursion 6.0 4WD
1997 F350 CCLB 4WD 7.3
1996 F250 SCLB 4WD 7.3
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post #3 of 8 Old 03-24-2014, 02:53 PM Thread Starter
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I don't have any valve on my heater line, could that be me my problem? The grey vacuum line is just plugged in to a spot on a box that doesn't have a hole in it, it seems like a place holder...
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post #4 of 8 Old 03-24-2014, 07:49 PM
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Do you have a picture?

2005 F250 CCSB FX4 6.0
2003 Excursion 6.0 4WD
1997 F350 CCLB 4WD 7.3
1996 F250 SCLB 4WD 7.3
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post #5 of 8 Old 03-25-2014, 02:33 AM Thread Starter
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First pic of where the vacuum line is connected, I believe the picture got turned 90 degrees counterclockwise
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post #6 of 8 Old 03-25-2014, 02:36 AM Thread Starter
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Second picture of vacuum line unplugged, rotated again
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post #7 of 8 Old 03-25-2014, 11:53 AM
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can you get a picture of the heater hoses where they run along the pass valve cover?

2005 F250 CCSB FX4 6.0
2003 Excursion 6.0 4WD
1997 F350 CCLB 4WD 7.3
1996 F250 SCLB 4WD 7.3
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post #8 of 8 Old 03-26-2014, 10:00 AM
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im interested myself - have similar issues!

Tom Brown
2004 Ford SEXcursion Limited 6.0
1991 Ford Mustang LX 5.0
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