87 Bronco Defroster

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Jan 10, 2003 | 04:43 PM

Mark78F250

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Joined: Jan 2003

Posts: 32

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From: Folsom

87 Bronco Defroster

Hi all...I am posting for a friend who needs help.
His defroster doesn't seem to be working on his 87 Bronco. (351, automatic with AC).

The fan works fine, but the windows don't clear up.

Any ideas?

Thanks..Mark

Jan 10, 2003 | 05:35 PM

bronco cam

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Joined: Sep 2002

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87 Bronco Defroster

Does he have air conditioning? Is it working? The air conditioning actually kicks on when you have the defrost on. It makes a difference. My windows stay a little foggy because my airconditioner needs recharging and is not working. Thats if the obvious like no air blowing from defrost vents has already been checked.

Jan 10, 2003 | 05:56 PM

90EBBronco

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Joined: Feb 2002

Posts: 256

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From: Central Iowa

87 Bronco Defroster

If you are sure that the fan is working make sure that the air is warm and the heater otherwise works normally. If you live in the north and are concerned with defrosting your windows and your heater core is shot the air that blows out isn't going to be very warm. Is there any radiator coolant on the passenger side floor? Also check out the thermostat and be sure that it is functioning correctly. Just a few ideas to start with. If you could get some more info on the exact symptoms it would be easier to diagnose. Thank God I live in south TX and don't ever have to use my defroster!!! Burrrr!

KJ

Jan 10, 2003 | 08:37 PM

craterjoe

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Joined: Jul 2002

Posts: 234

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From: mpls Usa

87 Bronco Defroster

[updated:LAST EDITED ON 01-10-03 AT 09:39 PM (EST)]yeah but up here along the "northern coast" ie; minnesota we can turn on our defrosters and slide around in the white stuff....

MEGA FUN!!

at least in most years, this year we still have dry ground and tonite is the coldest yet this year -5 degrees F. just two days ago it was 50+

god I love it here!

But seroiusly, make sure nothing has fallen down into the defrost vents or that a sm all creature hasn't taken up residence in there.

craterjoe

1996 bronco xl
four wheels
steering wheel
windshield wipers
GOOD HEATER!
seats
windows

bone stock and luvin it

Jan 10, 2003 | 10:52 PM

BOJOFASO

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Joined: Apr 2002

Posts: 813

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From: NJ

87 Bronco Defroster

crater joe
love the desciption of your bronc sounds exactly like mine.

Jan 10, 2003 | 11:01 PM

treehugger36

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Joined: Jan 2003

Posts: 392

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From: The South

87 Bronco Defroster

Like the other guy said... check the heater core. Mine was doing the same thing before I switched it. also, with a cracked core it will blow really oily air and kinda make it worse... atleast it seemed to in my case.

Peace

-treehugger36
------------------------
"Full size man! Not one of those pansy Bronco II's!!!"

Jan 11, 2003 | 12:06 AM

greystreak92

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Joined: Sep 2002

Posts: 9,182

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From: Gateway to the West

87 Bronco Defroster

You say the fan works.....does it blow out the defroster vents when it is selected? If not, you are looking for a vaccuum leak or dashpot in the dashboard (or under it) that is not making the internal air vanes move to the defrost position.