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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

heater problems

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Old Dec 29, 2017 | 09:02 AM
  #1  
The White KNight's Avatar
The White KNight
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heater problems

Hi everyone im new here to this forum i have 2006 f350 6.0l. i have been having problems with the heat only working when im at idle but when im driving it is getting cold as ice. i checked hgs i have checked vacuum lines have have check the oil to make sure it wasn't milky um-mm blendor actuator is working properly. i dont what else it would be and it acts like it needs burped. cause the degas container has some pressure not a lot though and it leaks a little. can some one help. also can anyone tell me y it is building pressure in the degas and what all could cause that to happen i would greatly appreciate any help thanks.
 
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Old Dec 29, 2017 | 08:45 PM
  #2  
vfelix702's Avatar
vfelix702
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i had the same conditions my thermostat was bad... replaced it and had no more issues truck was also running cold as stat was wide open... in your case i would check to see if heater valve is operating opening and closing in addition to having a clogged heater core try flushing / back flushing heater core isolate it so that it you flush it by itself.
 
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