C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Heater not working

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Old 01-07-2015, 05:49 AM
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66cutlass
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Default Heater not working

I have a 1986 which has heater issues I am trying to resolve.

The first issue is the air blows cold until I remove the fuse and replace it back. Then heat begins to come out. The cold button works but the hot button does not.

Also. The vents work on bi- level and heater except that nothing come out of side vents and defrost vent.
Old 01-08-2015, 01:11 AM
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Cliff Harris
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Do you have the manual C60 HVAC system with the sliders or the C68 digital HVAC system?

Which fuse are you removing and replacing?

Once you answer these questions we can go into much more detail on where to look and what to look for.



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