1. Welcome to Hvacproforums, an interactive community exclusively for HVAC professionals. The collective years of HVAC experience and the knowledge our forum members share make this an invaluable resource for those in the HVAC industry. We have a lot of fun, but make no mistake, we are pros. Hvacproforums is self supporting ...there are NO advertisers here. Do-it-yourselfers and Homeowners are encouraged to seek information elsewhere. Those involved in the HVAC industry are urged to register. its 100% free and easy, Once registered you will have access to the technical forums, Be sure to click over to the new members forum and introduce yourself after registering!

I'll be darned! Ford F150 hvac

Discussion in 'Lounge' started by Snoring Beagle, Aug 15, 2011.

  1. Snoring Beagle

    Snoring Beagle Need Little - Want Less - Love More

    Messages:
    11,148
    Coming back from the Upper Peninsula I noticed that the heat was always on. If I turned the temp control knob from hot to cool nothing changed. Everything else was working.

    So I tell my better half I'll research it. The web is a wonderful thing. I come up with a blend door that is either broken, cheap abs plastic design where the Electronic actuator connects. The electronic actuator is bad or the control knob which is a pot is bad.

    Then there was the heart stopping dealer repair of the broken door charge, $1000 to $1500.
    Got's to pull the dash and maybe the coils.

    A less expensive repair for the door some guy in Austin Texas came up with that used a dremel to cut your way in thru the glove box to change the blend door with his heavy duty version.

    Then there was the electronics and a lot of question how to determine that.

    So I go out and start to look closer at the heater and listen for all the dampers opening and closing. There are three, two are run by vacuum and then that blend door which is electronic.

    Hmmmm... the vacuum ones are doing their thing. So is the blend door sort of. It's actuating only on one end of the dial. :headscratch:

    Then it dawns on me that this electronic setup at no different than some of them hot and cold water 24 volt dc valves I deal with. Ah ha the actuator needs to be calibrated again!!

    So I drive the door actuator fully open then fully closed a couple of times, listen to what is moving and feeling the air coming out the ducts. Ta da it's working again!

    No where in all the research I did on the web was this test or check out mentioned.

    I'll be darned... the actuator forgot where it was at in it's travel.

    Anybody know if I could be right :dancenana:
    or
    just making something outta nothing? :dunno:
     
  2. Catpower

    Catpower The Crowd Pleaser

    Messages:
    22,466
    Location:
    in the Cabana
    You're probably right, once I had an 85 F 250 that the dampers didn't work right, they were rusted in place, and I had to take the dashboard out to fix it is a Mo Fo to take out and put back in

    But it was a good experiance the next spring I had to take it back out to change the evap coil
     
  3. CincyHVAC

    CincyHVAC Hoptimus Prime, Master of Beer-Fu

    Messages:
    46,995
    Location:
    Ohio's Southern Shoreline
    Sounds right to me as well. I have a 2002 Explorer that had the same issue a year ago. Only the linkage on the fresh air damper was broken......
     
  4. jrbenny

    jrbenny Yuge member

    Messages:
    31,370
    Location:
    Not here but over there.
    My Silverado did that. Had to cycle it a few times to get it blending again. Damn door would stick in full heat and you'd be sweating like a MoFo on a 90F day.
     
  5. oroy54

    oroy54 New Member

    Messages:
    22,811
    Location:
    Victoria, Texas
    Mine was the same Beagle.. Cooling one moment and hit a bump bingo go to heat... For right now I put a shut off valve on the heater hose coming from the engine. Just like in the old days.. Just open it up come winter.
     
  6. flange

    flange Act like you care and do SOMETHING!!

    Messages:
    12,967
    Location:
    IMT--in my truck
    man I thought ford came out with a new truck or something geared toward us folks. ac, how about 2/55.
     
  7. Snoring Beagle

    Snoring Beagle Need Little - Want Less - Love More

    Messages:
    11,148
    Now dat be da Roy I remember...

    [​IMG]
     
  8. oroy54

    oroy54 New Member

    Messages:
    22,811
    Location:
    Victoria, Texas
    On a later model trucks, there are no vacuum hoses under the dash..
    The fail safe position for automotive systems is to fail to the inside windshield defrost mode.
    Vacuum or not....
     
  9. Jay 41

    Jay 41 Whole-ass

    Messages:
    141,997
    Location:
    Madiganistan
    It's says Ford.......It should say drive immediately to junk yard.........and run like hell.:lachen::lachen::lachen:
     
  10. CincyHVAC

    CincyHVAC Hoptimus Prime, Master of Beer-Fu

    Messages:
    46,995
    Location:
    Ohio's Southern Shoreline
    Damn.............:loltard:
     
  11. yoop

    yoop Money talks......but all mine says is "Goodbye"!

    Messages:
    2,356
    Location:
    USA
    There's a sensor in all vehicles that automatically brings on the heat once you cross the mighty Mac. There's no reason for vehicles to have air conditioning up here in da U.P.. The sensor must have stuck once you fudgies got below the bridge, since they should automatically open back up once down in troll-land, allowing your a/c to once again work. :D

    P.S.
    You will have to bring the vehicle back across the bridge to a dealership up here. U.P. dealershiops are the only ones who know where the sensor is! ;)
     
  12. CincyHVAC

    CincyHVAC Hoptimus Prime, Master of Beer-Fu

    Messages:
    46,995
    Location:
    Ohio's Southern Shoreline
    I didn't need my ac until I got as far south as Piqua, Ohio...........:D

    You got a beautiful state, Yoop........
     
  13. oroy54

    oroy54 New Member

    Messages:
    22,811
    Location:
    Victoria, Texas
    An F-150 or a car A/C is a 4 ton unit...
     
  14. Snoring Beagle

    Snoring Beagle Need Little - Want Less - Love More

    Messages:
    11,148
    Yeppers that yoo pee is all black top and trees. One big reservation it be!
     
  15. oroy54

    oroy54 New Member

    Messages:
    22,811
    Location:
    Victoria, Texas
    Why do you think the use R12 or 134? It"s like a rolling refrigerator.
    A house in South Texas needs that.. It is 104 F right now.. I need to hook up a trailer for work tomorrow.
    I will have to use leather gloves to touch any metal.

    3 blow outs on tires in the last 6 weeks.