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imjwag
User
Nov 17, 2013, 12:09 PM
Post #1 of 5
(5934 views)
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2008 ford ranger no heat
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2008
ford
ranger
2.3L
28000mi
this is my gf's truck.
heat has always worked extremely well up till now.
first time this season heat was needed, she turns the temp switch to the red side and no heat.
my first thought was the inline control valve...connected hand held vacuum pump to actuator and applied vacuum and released to see if valve was operating properly.
actuator worked as supposed to...full open to full closed and no leak down.
connected an inline vacuum gauge to the vacuum line going to the actuator...started engine...vacuum gauge moved to 10 inches of vacuum but immediately started slowly losing vacuum till it was back on 0.
never regained vacuum no matter what position the temp switch was turned to.
coolant level is normal.
where do I need to turn my attention to now to fix this problem?
as always, any help from you all is and will be very much appreciated.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2013, 12:14 PM
Post #2 of 5
(5930 views)
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Re: 2008 ford ranger no heat
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With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If not too hot to hold, then you have to look at the actual engine temp and if that is up, if it is, then your looking at a restricted heater core.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
If they are both not too hot to hold on to, then you either have a restricted heater core or the system is not completely full and getting air pockets for some reason.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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imjwag
User
Nov 17, 2013, 12:47 PM
Post #3 of 5
(5922 views)
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Re: 2008 ford ranger no heat
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temp- normal operating
heater hoses not hot to the touch until I removed the vacuum line and valve opened...then hoses same temp as radiator hose.
the valve operates as I pull the vacuum line on and off....however, the valve/actuator does not respond to switch movement.
so, I will turn to look at the blend door possibility....ouch!....I don't have a printed view of how to proceed...is there a site that I may visit and retrieve a print-out of this?
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 17, 2013, 1:09 PM
Post #4 of 5
(5920 views)
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Re: 2008 ford ranger no heat
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It can be accessed through the defroster opening at the top of the dash on the passenger side after removing the louver and vent hose.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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imjwag
User
Nov 17, 2013, 1:58 PM
Post #5 of 5
(5916 views)
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Re: 2008 ford ranger no heat
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thank you my fellow wrench turner for your help
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