Please help cool heat.
#16
01-13-2012, 01:35 PM
Join Date: Jan 2012
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#17
02-13-2012, 05:44 PM
Whats the latest update? You get it fixed. It was 18 degrees this morning and my heat was nothing...... barely warm. I put in a new T-Stat and that did nothing. I haven't flushed anything yet. Im going to look at it this weekend. I justn dont understand this crap. Someone mentioned the cooling fan staying on all the time, is that a common problem with these expeditions? I have a 2000 Eddie Baurer with the 5.4L
#18
02-13-2012, 07:17 PM
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#19
12-25-2013, 08:18 AM
There are 2 things you can do which will help. I have a 4.6. 5.4 is plumbed differently.
The first is to unplug the pressure sensor on the air conditioning pipe in the front passenger corner at the front of the vehicle. That will disengage the air conditioning compressor from running when you select Panel and some other settings. You will notice that there is more available heat like this. Remember to plug it back in for summer.
The next thing, on the 4.6 is to remove the flow restrictor on the supply hose for the heater. That is the one with all the bends in it, attached to a tube coming up from the area of the firewall on the passenger side.
What happens on older engines where antifreeze has not been changed often enough, rusted particles of cast iron flake off and enter the cooling system. They flow though until they get behind the 1/4" orifice in the flow restrictor and then you only get a small amount of heat with the fan on low. Anything above that pulls all the available heat out of the core and blows cold.
I did both of these on my 99 and now I have ample heat (not 100%, but quite ample) for a 80 mile drive in 25 degree weather.
The first is to unplug the pressure sensor on the air conditioning pipe in the front passenger corner at the front of the vehicle. That will disengage the air conditioning compressor from running when you select Panel and some other settings. You will notice that there is more available heat like this. Remember to plug it back in for summer.
The next thing, on the 4.6 is to remove the flow restrictor on the supply hose for the heater. That is the one with all the bends in it, attached to a tube coming up from the area of the firewall on the passenger side.
What happens on older engines where antifreeze has not been changed often enough, rusted particles of cast iron flake off and enter the cooling system. They flow though until they get behind the 1/4" orifice in the flow restrictor and then you only get a small amount of heat with the fan on low. Anything above that pulls all the available heat out of the core and blows cold.
I did both of these on my 99 and now I have ample heat (not 100%, but quite ample) for a 80 mile drive in 25 degree weather.
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