help with '86 bronco heater

Reply Subscribe

Thread Tools

Search this Thread

Feb 15, 2015 | 09:19 PM

Tyaz92

Thread Starter

New User

Joined: Sep 2014

Posts: 23

Likes: 0

help with '86 bronco heater

I just bought an '86 Bronco 351w and the guy told me only the defrost works on the heater, it won't push through the vents, idk where to start to see what's wrong? Any help is appreciated!

Feb 15, 2015 | 11:21 PM

rollerstud98

Logistics Pro

Joined: Sep 2006

Posts: 4,863

Likes: 4

From: Airdrie Alberta

They still cable controlled in 86?

Feb 15, 2015 | 11:34 PM

Torky2

Fleet Mechanic

Joined: Sep 2003

Posts: 1,716

Likes: 15

Sounds like a climate-control vacuum leak. Take a look at the "FAQs" at the top of the Bronco Forum here, there may be something about it. It's a common topic.

Feb 16, 2015 | 10:21 AM

1985 Bronco

Laughing Gas

Joined: Nov 2013

Posts: 1,210

Likes: 7

From: Minnesota

There is 2 types of heat/AC for 80-86 trucks. Factory installed, which is vacuum controlled, and dealer installed, which is cable controlled. For 80-86 trucks, the heat only comes out the defroster vents, and the floor, if you have vents on the dash, they are for AC only. Does your floor heat work? Is your blower motor working? You may want to remove it, and check if there is anything in there blocking it. It is common for leaves to get in there.