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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Heater-Air actuated servo

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Old Mar 28, 2016 | 07:10 PM
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From: Sun River St. George
Heater-Air actuated servo

On the heater box under the hood is an air actuated servo. Off this servo comes a white plastic line (broken off). I cannot figure where the other end of this line connects, it's totally missing. I'm thinking that it should connect at the selector switch on the dash? Thanks for the help.
 
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Old Mar 28, 2016 | 07:24 PM
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ArdWrknTrk
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Yes, the fresh/recirc door actuator goes back into the bundle of lines beneath the heater hoses.

You can likely unwrap a bit of that and find the other end.
Most all of these are brittle and broken by now.
The simple repair is to replace the missing line with a piece of rubber vacuum hose that slips tightly over each end.
 
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Old Mar 29, 2016 | 01:30 PM
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Thank you. I appreciate the help.
 
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Old Mar 29, 2016 | 03:10 PM
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This thread from another forum may help: A/C and/or heater stuck on defrost - Ford Bronco Forum

It has photos of the routing and the other end of that vacuum line.
 
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