heater control valve stuck

Discussion in 'Technical' started by mashori, Feb 19, 2009.

  1. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick
    My heater won't work on my 71 mav, A/C works great and all the other functions are fine on the control panel. I checked my heater control valve and noticed it was kinda stuck so I turned on the heater and manually pushed down the lever on the control valve and the heater worked great.

    Do I need to change the control valve? Is there a cheaper one than this $70 piece?

    [​IMG]

    Also, is it hard to change? Because it looks like I'd have to drain the coolant.
     
  2. Mavman72

    Mavman72 Gone backwards but lookin' forward

    Joined:
    Apr 24, 2007
    Messages:
    6,759
    Likes Received:
    272
    Trophy Points:
    273
    Location:
    Buffalo N.Y.
    Vehicle:
    1972 Maverick 2 door.Original V-8 3 spd std shift.Also a 72 one owner Sprint sporting a 351 Windsor
    Pinch off the hoses then remove the old one.(minimal coolant loss that way)post an add on the forum...betcha someone has a good one to sell.Or go junk yarding.Should be able to find one in any ford/lincoln/merc with A/C of the era,just gotta hope you find a good one.
     
  3. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick
  4. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,456
    Likes Received:
    2,835
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber

    what you need to know is what valve it is...norm open/closed... these valves work both ways.
    my valve will close when i start the car...when i turn the heater on, it opens...:yup:
    you are on the right track to find one. i have a black plastic one on my Mav.

    ...Frank...
     
  5. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,456
    Likes Received:
    2,835
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
  6. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,456
    Likes Received:
    2,835
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber

    you may want to flush the heater core while you're at it. just take both heater hoses off at the engine. run water through one hose and then the other. do this untill the water is clear. change the valve and all you have lost is the coolant in the heater core.


    ...:thumbs2:...
     
  7. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick
    nice! that sounds simple. got it . . . and sweet idea about pinching the hoses, so simple but saves me a lot of time.
     
  8. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick
    Could I purchase this one instead? I see it on the parts list of the 1976 cars. Does it have the vacuum regulator on it as well? This is thing is like $12! :yup:

    [​IMG]
     
  9. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,456
    Likes Received:
    2,835
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
    i would say...YES...make sure the valve is closed w/vac. on. (5/8"x5/8")

    ...:Handshake...
     
  10. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick
    Oh good! my local Kragen in santa monica has it so I'll pick it up.
     
  11. ford84stepside

    ford84stepside Lone Wolf

    Joined:
    Nov 25, 2004
    Messages:
    4,038
    Likes Received:
    16
    Trophy Points:
    132
    Location:
    Berry Alabama
    Vehicle:
    1947 Lincoln Zephyr Coupe
    I bought a NOS Maverick valve off of eBay for less than $25. They are out there, just have to look around...
     
  12. markso125

    markso125 Member

    Joined:
    Aug 19, 2007
    Messages:
    1,714
    Likes Received:
    6
    Trophy Points:
    117
    Location:
    Lewiston Ut
    Vehicle:
    1972 maverick 2 door LDO
    I am running one of those. There are two vacum lines running through your firewall if you trace them you will find that they both go to a T and the upper one has a cutoff valve inline "water valve vacuum switch"(you can see it on the front of your heater box ) all it does is is allows the valve to open more when the heater is in certain positions (defrost compared to floor whatever) but they both come from the same vacuum scource.[​IMG]
     
  13. mashori

    mashori Member

    Joined:
    Apr 21, 2006
    Messages:
    3,630
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    San Diego, Ca
    Vehicle:
    1971 V8 Maverick

Share This Page