heater controls

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Jan 6, 2013 | 12:53 PM

#16

81-F-150-Explorer

Post Fiend

Joined: Jul 2004

Posts: 8,786

Likes: 28

From: Northern California

The non-A/C controls don't use vacuum at all, unless they are certain HI Output systems.

One Cable for temperature goes from the control, through the firewall to the blend door.

The Other Cable for heater function. Heat/Defrost/Off etc... No Vacuum connected.

Jan 6, 2013 | 01:06 PM

#17

Gary Lewis

FTE Legend

Joined: Jul 2010

Posts: 32,875

Likes: 48

From: Northeast, OK

Ahhhhhh. Good to know. Or, at least good to see. I'm not sure it will be retained as I think I've seen it before. My apologies if I have.

Jan 6, 2013 | 01:13 PM

#18

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

Likes: 40

From: EXTREME southwest CT

'87 non A/C does have the vacuum operated Blend Door.

Jan 6, 2013 | 01:27 PM

#19

85lebaront2

Old School Hot Rodder

Joined: Feb 2006

Posts: 6,472

Likes: 11

From: Exmore, VA

Jim, that actuator is the fresh/recirc door, blend is cable operated until the 97/8 new body, then it is electric. Your blend door is inside like an AC equipt truck.

Jan 6, 2013 | 01:31 PM

#20

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

Likes: 40

From: EXTREME southwest CT

Oh, Okay.
That must be the cable clipped to the front of the heater box.

Jan 6, 2013 | 01:33 PM

#21

85lebaront2

Old School Hot Rodder

Joined: Feb 2006

Posts: 6,472

Likes: 11

From: Exmore, VA

You are absolutely correct sir. Be glad Ford started that in 1987, that style heater core is a breeze to change. For a beer drinker it's not even a six pack job.

Jan 6, 2013 | 01:55 PM

#22

ArdWrknTrk

pedant

Joined: Jan 2008

Posts: 23,576

Likes: 40

From: EXTREME southwest CT

When I had a cracked head that would only open up after really beating on it, I must have changed that core 12+ times.
With my tools out I can have it R&R'd and purging in under 20 minutes.