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Old December 24th, 2010, 03:25 PM   #1
big_ol_bronco78
Psalm 40:2
 
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no heater control

Got a 85 bronco with really hot heat. Previous owner said truck was this way when he got it, even if you have heater control on cold it still blows super hot. Any ideas on why I can't adjust heat? Thanks
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Old December 29th, 2010, 02:12 PM   #2
wilesin
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There is a control valve on the heater hoses near the fire wall. This could be broke, the cable could be broke leading to it, or the valve could have been eliminated as they were known to leak.
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Old December 29th, 2010, 10:20 PM   #3
big_ol_bronco78
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thanks, i'll look at that.
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Old December 30th, 2010, 09:31 AM   #4
wilesin
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It may also be vacuum operated so you may have a broken vacuum line from the HVAC controls to the valve.
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