Last post on Nov 16, 2013 at 2:51 PM
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Ford Expedition, Heating / Cooling
#72 of 145 2000 ford expedition no heat
Feb 09, 2010 (1:34 pm)
When the heat wnt out it went form back to front back blew cold air then after awhile the front did the same thang iv had it flushed 3 times and did get some heat then after a few hours of the car not running no heat all lines front and back are really hot iv changed water pump, thermostat, pressure cap, and even flushed it again still nothing so i opend up the rear heater core and that was hot then i learned that it really cools down when u put the fan on it without air blowing on it i could barley touch it put fan on full speed and within seconds i could grab the core and no heat at all so i replaced the core and still the same thing. Well im stuck i dont know what to do all doors work at the rear unit what could the problem be. I have been told that if the front core is plugged that should not effect the flow to the back is that true or could the front core be the problem what else could it be please help im tired of frezzing
#73 of 145 Re: Blower stays on High [adk_jakes]
Feb 21, 2010 (11:09 am)
where is the fire wall located at?
#74 of 145 Re: Blower stays on High [camden23]
Feb 22, 2010 (5:39 am)
That would be the piece of metal that separates the passenger cabin from the engine bay.
#75 of 145 Re: 2000 ford expedition no heat [ihatefords2]
Feb 27, 2010 (3:31 am)
DOES ANYONE EVERE AWNSER THESE ?
#76 of 145 Re: 2000 ford expedition no heat [ihatefords2]
Feb 27, 2010 (10:45 am)
People do respond when they have answers.
Your problem could be due to a number of things. Have you considered replacing the heater core?
SUVs and Smart Shopper
#77 of 145 No heat, overheats, cold front vents, etc
Nov 07, 2010 (11:45 pm)
This might be lengthy, but it is detailed, "HELP" I have a 98 Expedition 4.6L Winsor motor (few left the shop with this engine) Here goes. Temp reads normal (1/3 on gauge) as I drive 50+ mph, turn off onto an exit and the temp gauge slowly (2-3mins) goes almost to cold then immediately taps out at HOT. (It doesn't rise gradually, just takes off) Turn the ignition key off, wait 10-30 seconds, turn on and reading normal again. She idles normally at 850 with a normal temp, rev to 1500 for a few minutes and it tops out at HOT again. No heat through front vents, rear was ok, now no heat through rear either. Replaced thermostat (195 oem), flushed engine with an after market reverse fluch kit, changed water pump, changed temp sensors, change degause tank (resivoir), same overrheating issues. NOTE, the top radiator hose does not get warm. Ran the car without the termostat and the hose gets warm, so I'm guessing the replaced water pump is working w/o the termostat. Without the thermostat, at idle and all speeds, the needle is steady right at the top of the "C" (cold) and doesn't vary. (of course not heat) Tried a 180 degree thermostat to no avail. Changed thermostat 3x in a week (all newly purchased), thinking I may have gotten a bad one. Upper hose still does not get warm. Changed oil and dropped tranny pan to change filter and fluid. No water in oil or tranny fluid, same the other way around, antifreeze is clean. Funny thing, I got heat a few times for a few minutes when the temp gauge tops out at HOT. Heard it may be an airpocket, so I drilled and tapped the thermostat housing to bleed the air. Even filled with upper hose disconned at radiator till I saw antifreeze run out. I'm running the truck right now w/o the thermostat. I know this is not a good idea with everything electronic running the variables fuel, timing, etc. The only thing I haven't changed was the fan clutch. I believe this shouldn't have anything to do with this, however I need to keep busy or I'll go insane. Any help on this one would be appreciated. BTW I do have a fix for the EGR error code that comes up on these trucks too. That'll be posted in a few days
#78 of 145 Continuation of post #77
Nov 08, 2010 (3:35 pm)
I forgot to say when I mentiioned about not having any cross contamination between fluids, there is also NO steam or water comming throught he exhaust, thus I don't believe it is a head gasket. Thanks again for any replies, even it it's a "Dunno" Thanks
#79 of 145 Re: 2000 ford expedition no heat [ihatefords2]
Nov 27, 2010 (10:44 am)
Did you ever figure out what was wrong with yours? Mine has the same symptoms, and I was going down the same path to fix it (you said you'd already replaced the heater core). I tore it down last night, intent on replacing the heater core, but after I verified that the blend door was working, I started the car and let it warm up. The heater core got hot to the touch, which made me rethink -- it seems like it's flowing coolant and getting hot. I then reassembled everything, and I still get airflow that's only a few degrees warmer than if I were running the cold, outside air through it.... Looking for answers. Anyone?
#80 of 145 Re: 2000 ford expedition no heat [greg858]
Nov 27, 2010 (12:39 pm)
Sounds to me like it is the temp control knob - it is either spinning on it's shaft or the resistor behind it is no good.
#81 of 145 Re: 2000 ford expedition no heat [alwaysfords2]
Nov 28, 2010 (1:27 pm)
But if it were the temp control knob, the blend door wouldn't be going from max open to max close, would it? The blend door is working perfectly (I cut a small observation hole in the plenum and can watch it work.)