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Heater isn't working..Help Please!!

Discussion in 'Stock 1995 - 2001 Explorers' started by kritacal88, November 24, 2011.

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  1. kritacal88

    kritacal88 Member

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    ok so winter is here..found out the heater don't work and temp gage is always at cold..just got done replacing the thermostat which fixed the temp gage problem but the heater is still not working..any suggestions on how to diagnose the problem?
     
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  3. drdoom

    drdoom Well-Known Member

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    Read the stickies on Blend Door repairs, and search Blend Door also. That should keep you busy for a while.
     
  4. kritacal88

    kritacal88 Member

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    ok so i checked out the blend door threads. seemed simple. tried it out. Blend door works perfect so that isnt the problem. it opens and closes as you turn the knob from cold to hot. so the blend door problem is eliminated. what else could it be?
     
  5. yavapaires

    yavapaires Active Member

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    Check the heater control valve in the heater hoses.
     
  6. Turdle

    Turdle Moderator Staff Member Moderator Elite Explorer

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    You probably do not have enough coolant in the system yet, and there is an air bubble in the heater core. Try burping it a few times with the front of the vehicle raised up.
     
  7. kritacal88

    kritacal88 Member

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    how would i check it to see if it works?
     
  8. kritacal88

    kritacal88 Member

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    ok so ramp up the front end and turn the heater on? Burp it?
     
  9. Turdle

    Turdle Moderator Staff Member Moderator Elite Explorer

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    yep
    run the engine until warmed up good, then turn it off. Let it cool enough to safely remove the radiator cap and re fill the radiator. You may need to repeat this several times to get all the air out.
     
  10. yavapaires

    yavapaires Active Member

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    Locate the heater control valve, and note the position of the plunger at the bottom of the valve. Turn heater control to full heat, and look for the plunger tochange position. It is vacuum controlled
     

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