Heater Problems

Discussion in 'General Maverick/Comet' started by old preacher, Aug 4, 2019.

  1. old preacher

    old preacher Member

    Joined:
    Nov 27, 2013
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    13
    Location:
    Colorado
    Vehicle:
    1973 Ford Maverick
    I can't get any heat out of the heater in my 73 maverick w/air. I have flushed the heater core. There is not control for the water flowing into the heater. The hoses go from the engine straight to the heater. The vaccum lines are all dead. I would like to just set the doors so it heats all the time. Can some one tell me how to do this??
    Old Preacher
     
    old preacher, Aug 4, 2019
    #1
  2. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

    Joined:
    Mar 9, 2002
    Messages:
    18,225
    Likes Received:
    1,310
    Trophy Points:
    878
    Location:
    Albany, Indiana
    Vehicle:
    1972 Maverick Grabber - Color: Orange Also, 1976 Ford Maverick 4-door, 1977 Mercury Comet 2-door.
    Can you get the air flow to change from defrost to dash to floor, etc?
     
    Craig Selvey, Aug 5, 2019
    #2
  3. old preacher

    old preacher Member

    Joined:
    Nov 27, 2013
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    13
    Location:
    Colorado
    Vehicle:
    1973 Ford Maverick
    Yes, I know where that lever is and I can move it manualy. I don't know where the lever is to switch from Air conditioning to heat.
     
    old preacher, Aug 5, 2019
    #3
  4. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

    Joined:
    Mar 9, 2002
    Messages:
    18,225
    Likes Received:
    1,310
    Trophy Points:
    878
    Location:
    Albany, Indiana
    Vehicle:
    1972 Maverick Grabber - Color: Orange Also, 1976 Ford Maverick 4-door, 1977 Mercury Comet 2-door.

    That would be the same switch.

    You say all the "vacuum lines are dead". What do you mean?
     
    Craig Selvey, Aug 6, 2019
    #4
  5. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,575
    Likes Received:
    2,338
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    The temp control operates blend(temp) door and is cable operated.

    Vacuum controls A/C vents, defrost & floor outlets,.
     
    Krazy Comet, Aug 6, 2019
    #5
  6. old preacher

    old preacher Member

    Joined:
    Nov 27, 2013
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    13
    Location:
    Colorado
    Vehicle:
    1973 Ford Maverick
    THere is vaccum to the two little vaccum connections on the engine side of the fire wall. There is vaccum to the little switch in the middle of the heater but that valve is blown out. All the other vacum lines have no vaccum at all.
     
    old preacher, Aug 6, 2019
    #6
  7. old preacher

    old preacher Member

    Joined:
    Nov 27, 2013
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    13
    Location:
    Colorado
    Vehicle:
    1973 Ford Maverick
    My manuel says that that little vaccum switch in the middle of the heater box is the heater control valve. it is situated so that when you move the cable it moves a lever on this tiny little thing. My car is in Tn and I am in CO so I am not looking at it.
     
    old preacher, Aug 6, 2019
    #7
  8. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

    Joined:
    Mar 9, 2002
    Messages:
    18,225
    Likes Received:
    1,310
    Trophy Points:
    878
    Location:
    Albany, Indiana
    Vehicle:
    1972 Maverick Grabber - Color: Orange Also, 1976 Ford Maverick 4-door, 1977 Mercury Comet 2-door.
    Unless you have a tight, leak-free vacuum system....none of it will really work.
     
    Craig Selvey, Aug 7, 2019
    #8
    Krazy Comet likes this.
  9. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,575
    Likes Received:
    2,338
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    Mine doesn't have vac connected at all, leaks like the proverbial sieve. Has no heater control valve & heat temp is adjustable(makes very good heat in fact) but it's always coming out d-frost and floor.
     
    Krazy Comet, Aug 7, 2019
    #9
    Craig Selvey likes this.
  10. old preacher

    old preacher Member

    Joined:
    Nov 27, 2013
    Messages:
    38
    Likes Received:
    0
    Trophy Points:
    13
    Location:
    Colorado
    Vehicle:
    1973 Ford Maverick
    I flushed the heater. Water came through fine. But I get no heat whatsover from the floor or defrost. Next time I drive it I am going to feel the heater hoses just to make sure that they are hot. I can't find a heater control valve. The heater hoses go directly from the engine to the heater conections on the fire wall so i am thinking that there is no heater control valve. Any other Ideas?
     
    old preacher, Aug 7, 2019
    #10
  11. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,575
    Likes Received:
    2,338
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    I don't have a heater control valve on mine. All it does is shut off the coolant flow when A/C is on, defiantly not your problem.
     
    Krazy Comet, Aug 8, 2019
    #11
    Craig Selvey likes this.

Share This Page