Vaccum Supply to vent control

	Blazer Forum Classifieds Photo Gallery Search Contact BF Sponsors
Blazer News Member List Forum FAQ Timeslips Recalls TSBs Calendars Register Login

Vaccum Supply to vent control

Printable Version

Blazer Forum >> Mechanical & Maintenance >> General Tech Help >> 2nd Gen (1995-2005) Tech >> Vaccum Supply to vent control

Page: [1]

Message

<< Older Topic Newer Topic >>

Vaccum Supply to vent control - 2/14/2008 8:37:15 AM

clone432

Posts: 28
Joined: 1/29/2007
Status: offline

Current situation: Vents stuck in default defrost/floor, with hissing noice when selector is in "floor" mode.

Last night I checked the operation of the vent to floor actuator (Drivers side under dash), this actuator has two vaccum lines....brown and gray I believe. One pulls up the other pulls down, with the default in the middle. I am 90% sure that my problem lies in the supply of vaccum to the Hvac controls, maybe a broken line. I have checked the line to the ball under the hood, looks good and shows good vaccum.

My question is this: Does anyone know the actual routing of the supply line, like where it passes through the firewall? Anyone had similar issues, and what was the fix?

Thanks!

_____________________________

1995 Blazer 4-door 4x4

Post #: 1

RE: Vaccum Supply to vent control - 2/19/2008 6:52:59 AM

Clay_Assassin

Posts: 33
Joined: 12/4/2007
Status: offline

I've got a similar problem with mine. Stuck in vent. Wont blow on the floor or the defrost.
Hopeing to look at it this weekend.

(in reply to clone432)

Post #: 2

RE: Vaccum Supply to vent control - 8/18/2008 8:04:07 PM

clone432

Posts: 28
Joined: 1/29/2007
Status: offline

Any update? Mine is no better......:(

_____________________________

1995 Blazer 4-door 4x4

(in reply to Clay_Assassin)

Post #: 3

RE: Vaccum Supply to vent control - 9/22/2008 7:56:24 AM

Clay_Assassin

Posts: 33
Joined: 12/4/2007
Status: offline

I just solved this issue.

There is a bank of solenoids behind the ashtray. For me, the solenoids failed.

If your climate control has an “Auto” setting, you also have these solenoids.
The service manual directs you to either the a/c control head unit or the solenoid bank. I was unable to determine which, so I purchased both parts and tested each to determine it was the solenoids.

(in reply to clone432)

Post #: 4