» » »

Ford Q&A

Ask Your Question

1997 Ford Explorer Question: where is heater control valve located on a 1997 ford explorer

 

Question

pgroth, 4.0L V6, Gig Harbor, WA, December 30, 2009, 15:57
 Rookie

heater is blowing cold air heater hose is hot going in and the other is not where is the control valve located on the 1997 ford explorer

3 Answers
Flag This
  • Answer #1

    Bret Bodas from RepairPal Test Shop, December 30, 2009, 17:06
     Master

    These don't have a heater valve, the coolant is always flowing through the heater core (normally). Sounds like you have a plugged heater core. Try flushing it out, and if it is plugged flush the entire cooling system.

    Flag This
  • Reply

    Bret Bodas, January 25, 2010, 09:54
     Master

    I stand corrected, thanks for the info "hevyg"!

    Reply
    Flag This
  • Medium-star Best Answer
    January 24, 2010, 12:40
     Rookie

    I did not author this, i would give credit to the author, but i cant find his name. I confirmed the information tho. I hope this helps.
    Answer
    There are a few things that could cause this to happen. On many vehicles there is a heater bypass valve on the water line that feeds the heater core. This is located under the hood and operated by a vacuum line. If this part is bad, no anti-freeze will run through the heater core. Another possibility is under the dash. There is a panel which opens and closes the hot air duct, located near the heater core. This is operated by a vacuum diaphram, which could be bad. It sounds to me like one of your selectors have gone bad. All of the vent controls run on vacuum, and the switch that selects them, or the temperature, may not be transferring the vacuum correctly. You can check the hot air duct diaphram after the engine is warm. First, watch the rod and switch from cold to hot to see if it's working, if not try the following. Have the selector on cold, and the vacuum line disconnected. Put your finger over then end of the vacuum line and switch the selector to hot, there should be vacuum in the line. If not, either the selector switch is bad or there is no vacuum to the switch. If there is vacuum at the line, but the flap doesn't move, the diaphram is most likely bad. You should be able to move the flap manually to make a temporary solution to this problem. As for the air conditioner, this almost has to be the vent selector switch at fault. Even with the air on, the heat should still come out warm. You can make the A/C stop by unplugging the two wire clip on the compressor.

    Flag This
  • Reply

    hevyg, January 24, 2010, 12:50
     Rookie

    One more note; I found this by googling 1998 ford explorer heater control valve. FYI
    Related Parts

    1998 FORD EXPLORER 5.0L 302cid V8 MFI (P) : Heat & Air Conditioning : Heater Control Valve Price Core Total
    MOTORCRAFT Part # YG361 {#1L5Z18495AA}

    $18.63 $0.00 $18.63
    FOUR SEASONS Part # 74859

    $23.79 $0.00 $23

    Flag This
  • Reply

    hevyg, February 13, 2010, 16:05
     Rookie

    Nah, its all good, i just happened to be dealing with the situation and had just purchased a valve. Turned out to be the infamous blend door. Who was the genius that created this pos. sigh,,,, ah well summer is coming lol.

    Flag This
  • Reply

    hevyg, February 13, 2010, 16:10
     Rookie

    Im betting your problem is the same as what im dealing with. The explorer and several others have an achilles heel called a heater blend door. If you take it to the dealer plan on a 1g+ repair. there are several options for fixing it yourself. some simple, some not. Try googling ford heater blend door. Or go to serious explorations and search it there.
    g

    Reply
    Flag This
  • Answer #3

    February 13, 2010, 14:28
     Rookie

    Most likely the heater airmix door. remove the actuator on the side of the hat air box on passenger side floor ( it's white and is held with 4 screws Be carefull with the connector if you remove the connector but for now watch the arm whitch turns very slowly when you turn the heater control knob) if this turns ok your problem if probly the flapper door inside the unit.their know to break and DORMAN offers a replacement abort 40 bucks at auto zone or advance but to replace this find someone with experience with heater core removal. ford only offers a complete unit for aroun 250 bucks.

    Reply
    Flag This