98 Blazer Heater flow

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tigerhwk

11-06-2007, 06:59 AM

98 Blazer,
The directional function on the Heat/AC has no response,Seems to have vacuum but will not switch from floor to dash to defrost and etc.
Any ideas,has anyone had this issue with the switches?

MT-2500

11-06-2007, 09:42 AM

Auto matic or manual ac controls?

The main issues on vent controls is not getting good vacuum from engine to switch.
How much vacuum are you getting to switch?

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