Heater blowing cold when idiling - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 12-06-2012, 06:28 AM Thread Starter
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Heater blowing cold when idiling

I purchased a 2006 F250 6.0 powerstroke with 12k on original motor. Noticed today that my heater is blowing cold when idiling but blows hot when driving. Any advice here for what I should be looking for or concerned with.

Last edited by SavannahMac; 12-06-2012 at 06:53 AM.
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post #2 of 6 Old 12-06-2012, 06:47 AM
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2006 models are 6.0s bud.

U have to be 2011 and up to have a 6.7. Just FYI.


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2016 F250 CCSB KR FX4
NL Fab:
---Stage 1 Intake
---EGR shmock off plates
---Flo Pro Exhaust (5" to 6" tip)
---SCT with GH tunes
---Waiting for first Fuel Filter change to install:
---------CCV Mod
---------CTS2 monitor with EGT Probe
Just passed 1,111.1 miles and LOVING IT!


**SOLD:
2010 F250 CC FX4
H&S
AFE Intake
and some other goodies...

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post #3 of 6 Old 12-06-2012, 10:29 AM
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engine is air locked...
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post #4 of 6 Old 12-06-2012, 07:17 PM
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My old Peterbilt would do this if the Coolant got low,

2011 F450 6.7 Lariat Pro Hauler
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post #5 of 6 Old 12-06-2012, 07:22 PM
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had the same symptoms when my head gaskets were blown. not saying your head gaskets are toast just saying that was a symptom of mine.
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post #6 of 6 Old 12-06-2012, 07:33 PM
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I'd be checking for an EGR cooler failure.

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