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98 Blazer Heater flow


tigerhwk
11-06-2007, 05:59 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, 08:42 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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