|
| Search | Car Forums | Gallery | Articles | Helper | Air Dried Fresh Beef Dog Food | IgorSushko.com | Corporate |
|
|||||||
| Problem Diagnosis Got a problem you can't fix? Post here and one of our members will answer as soon as possible. |
 |
 Show Printable Version | 
Subscribe to this Thread
|
|
|
Thread Tools |
|
#1
03-18-2010, 08:31 PM
|
|||
|
|||
|
HVAC selector switch
95 Blazer
Air comes out the defroster rather than where the selector switch is set. I can hear the air hissing. I took the rubbery diaphragm off the switch, put it back on, and no change. I go back out two hours later, and the switch works again. Can this switch be cleaned / resealed / fixed or do I need to buy a new one? Thanks in advance.
__________________
Cruize 1992 Ford Escort GT, 5-speed - Now with an unlimited slip clutch! :sarcasm1: 1995 Blazer LS, 4x4, 4 door 1996 Pontiac Grand Am GT, 5-speed 1997 Suzuki DR650 ~54 mpg 
|
|
#2
03-19-2010, 10:50 PM
|
||||
|
||||
|
Re: HVAC selector switch
Manual HVAC or Automatic Climate Control?
Air flow defaults to defrost when the system looses vacuum. Check vacuum reservoir, vacuum check valve, and the lines connecting them (under the hood).
__________________
You have to know how it works, to figure out why it doesn't.
|
|
#3
03-20-2010, 09:16 PM
|
|||
|
|||
|
Re: HVAC selector switch
It has the manual HVAC control.
I have vacuum at the control switch.
__________________
Cruize 1992 Ford Escort GT, 5-speed - Now with an unlimited slip clutch! :sarcasm1: 1995 Blazer LS, 4x4, 4 door 1996 Pontiac Grand Am GT, 5-speed 1997 Suzuki DR650 ~54 mpg
|
|
#4
03-20-2010, 09:21 PM
|
||||
|
||||
|
Re: HVAC selector switch
Tee a vacuum gauge into the HVAC line under the hood, before it goes to the interior. Start the engine, allow vacuum to build, shut the engine off... does the vacuum hold steady?
__________________
You have to know how it works, to figure out why it doesn't.
|
|
|
POST REPLY TO THIS THREAD |
 |
|
|
