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Ford Escort, Electrical, Wagon
#26 of 35 AC/Heater blower problems
May 06, 2003 (11:31 am)
I enjoyed reading all these entries, they make a lot of sense. My problem is slightly related to this. When I used the blower for heat or AC, ice builds up on the bottom of the motor, and we no longer have any air movement. Is this the same problem?
Please someone help me. I have a 97 Escort. email at "tkenneymn.rr.com" thanks.
#27 of 35 I suspect two things
May 06, 2003 (12:11 pm)
one, the drain is plugged in the evaporator housing, this alas appears to be rather common.
two, have a two-gauge check made on the a/c, I strongly suspect the charge level is wrong or you have a sticking relief valve that is causing overcooling.
#28 of 35 I suspect two things response
May 06, 2003 (2:17 pm)
Would this also cause the problem with the heater?
#29 of 35 your fancy-Dan modern cars always run the air conditioner
May 06, 2003 (4:53 pm)
so yeah, if you plug the evaporator up with ice and there's enough of it to also cool the motor case down to where it condenses water and ices up, there's probably enough to seize up a damper door someplace. if there's ice and the heat doesn't work, I'd absolutely suspect issues in the evap housing, and both a plugged drain and a charge or vapor regulation issue is not out of the question.
it could be a little icy drool down the housing freezing the blower cage, or it could be sticking a damper, but I'd attack the icing problem first and see what others remain afterwards. it is not good design practice to make a/c that ices up the blower, you are wasting energy and spending a couple bucks too much on the a/c when you build it. if you think like a nickel-shaving engineering department when you look at something, it leads to some trouble-shooting clues.
I may be assuming too much to assume the blower motor has already been tested and found working... blower motor dead so no air flows would also help explain everything, but it still shouldn't ice up that bad, suggesting there is another issue in the a/c. obviously, if the blower is dead, that needs to be attacked first to help isolate and determine how big the other issue is.
#30 of 35 You should at least hear the blower motor run
May 07, 2003 (5:24 am)
even if the exchanger ices over. Usually the high speed works even if the resistor pack is bad.
#31 of 35 I hear the blower
May 07, 2003 (10:28 am)
I can hear the blower, but no air flow is found. The whole system has been taken apart to see if the dampers are stuck, but nothing was found. If the evaporator is not working properly, then I can understand why the dampers stick.
#32 of 35 or certainly why there is no airflow
May 07, 2003 (4:37 pm)
when the a/c is dampered into effect, all or most of the airflow is pulled through the evaporator. if it's iced solid and you can't get air through, no airflow. if there's a bunch of slop like leaves and elm seeds and cottonwood cotton in there, you're not only restricting airflow, you also have increased the tendecy for the evap to ice up, because you can't get the water to drip off before it freezes in place. plugged evap and excess cooling look the same until you take the cover apart and see the coil itself.
this is why I am really hard to live with over the fact that they do NOT have a cleanable filter ahead of the coils. I have had to take a system completely apart to deal with it once, and that should not be necessary.
#33 of 35 Please Help!!! No heat or ac in my gf's 98 Escort.
May 31, 2003 (9:15 pm)
0patience, can you please send me the picture you linked too. It doesnt open. My girlfriends car has the same problems and If the picture explains it maybe me with my little mechanical ability will be able to fix it!!! Thanks for any help!!!
May 31, 2003 (10:20 pm)
New URL of image.
We had to split the site into 2 different domains, so some images were moved.
#35 of 35 Thank You 0patience
Jun 11, 2003 (5:01 pm)
Thank You 0patience