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Old 05-17-2011, 17:27   #1 (permalink)
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2008 Ranger V-6 Suddenly NO HEAT!!

Today, outside air temp is 50... turn the A/C control to non-conditioned outside air vent (about the 10 o'clock position) and rotate the temp control knob to Max Heat..... nothing but cold air.
Tried EVERY other A/C control setting.... nothing but cold air.
Tried a middle-of-the-road air temp..... still cold air.
Temp gauge is smack dab in the middle and does not change.
Stopped truck, popped the hood and checked the water temp going to the heater core both supply and return hoses.
Both are hot to the touch.
And this problem surfaced immediately and NOT gradually over time.
Hmmm... me thinks it's some kind of valve and if so, where is it and how much of a PITA is it to get to it and change it out??
Thx for any/all help!!
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Old 05-17-2011, 19:06   #2 (permalink)
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Re: 2008 Ranger V-6 Suddenly NO HEAT!!

It's probably the blend door motor or door itself. With the engine off and the key on, turn the temp control from hot to cold and see if you hear the motor operate. It's pretty quiet but you can hear it. Turn in the opposite direction to be sure of hearing it. If you do, the door may be broken. Here's a link for information on it. 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 Ford ranger, blend door auto AC heat replacement part
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Old 05-18-2011, 14:52   #3 (permalink)
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Re: 2008 Ranger V-6 Suddenly NO HEAT!!

Hi Bert,
Thx for the advice.
I did what you explained after I removed the glovebox door and everything was quiet.
When I turned the knob, absolutely nothing happened.
Tried it a bunch of times with all kinds of different heat/ac settings (of the blend doors)... no motor sound.
The servo DID operate/cycle the interior return air damper correctly.
Don't know what to do now, other than take it to Ford ;>(
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Old 05-18-2011, 16:26   #4 (permalink)
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Re: 2008 Ranger V-6 Suddenly NO HEAT!!

There should be power at the green/brown wire at the blend door motor. If not, the fuse in the box may be blown.
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Old 05-19-2011, 17:18   #5 (permalink)
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Re: 2008 Ranger V-6 Suddenly NO HEAT!!

OOPS... forgot to mention... checked fuse #27... 10A... and it was OK.
Can't even remotely think about removing the darn actuator as it's screwed in with 4 screws from the top down... 2 in front... 2 in back. I can FEEL the 2 in back and that's about it... can't even think about how to get a wrench or socket on 'em... the dash is directly overhead about a half-inch away.
I think they mounted this blower assembly on the chassis firewall and built the entire rest of the truck around it!
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