93 Bonneville SSE Blower/Heat Problems.

[MARGR4V3Z]

I have had this issue since I had the car and never really looked into it until today. The problem is heat doesnt want to blow out of the front vents. It blows out fine from the floor vents and eventually heats up the car. But why wouldnt it blow heat out of the front ones? I have attached a few pics of my settings and what I may have found today. Let me know what you guys think! Thanks!

Settings I had it on and only heat was coming from the Floor. It was on high too and it was blowing on at front vents but not very fast.


I had the car running with blower on High and it air was blowing out from that area. I didn't think that was good.


This is underneath the AC drier. Looks like the plastics are coming apart which leads up to the above picture.

[Bugsi]

This sounds like the broken clip on the rod that operates the vent doors. It's a well-known fail area which you can access through the glove box. I've never had that failure so I don't have pictures on hand, but someone here will, and if you do a search you should find it.

[MARGR4V3Z]

So I still dont get air out of my front vents so I did alittle more research and went at it today and searched all the vacuum lines. I found this. There is nothing attached to that nipple but that line next to it is what I found but it was just a piece and it didn't lead to anything. Any help would be appreciated! Thanks!

[Krenzy]

Just a guess but maybe that hose plugs into the elbow fitting atop the black canister there?

[MARGR4V3Z]

Just a guess but maybe that hose plugs into the elbow fitting atop the black canister there?

That loose hose to the left is junk it's about 12 inches and doesn't go to Anything. I just don't know what connects to that nipple?

[MattStrike]

The black canister has two vac lines - one goes to the gas tank (that looks like the one that's hanging off) and the other goes to the EVAP (purge) valve. I think that third hose barb has a plug in it, or it's a different canister. I'll have a look-see at mine tonight to see if I have that same barb and it's capped, or if it's something else..

[MARGR4V3Z]

The black canister has two vac lines - one goes to the gas tank (that looks like the one that's hanging off) and the other goes to the EVAP (purge) valve. I think that third hose barb has a plug in it, or it's a different canister. I'll have a look-see at mine tonight to see if I have that same barb and it's capped, or if it's something else..

Oh alright so there could be nothing wrong with it?

[MattStrike]

Depends if that third barb is/needs to be capped.

[MARGR4V3Z]

Depends if that third barb is/needs to be capped.

Gotcha, you live in Michigan as well how does your electic Climate control work for the heat?

[MattStrike]

It is lukewarm for the first hour, then stupid hot the rest of the time. But I know what that is. I've never noticed if it's blowing out of the front vents because I never use the front vents for heat, only ever use the floor and defrost vents.

[MARGR4V3Z]

It is lukewarm for the first hour, then stupid hot the rest of the time. But I know what that is. I've never noticed if it's blowing out of the front vents because I never use the front vents for heat, only ever use the floor and defrost vents.

Did you happen to check your canister for that connection?

[Sirius]

Your car is a '93 and the HVAC controller thinks it knows better than you where to direct the heat. You cannot choose to make it blow heat out of the dash vents; in heat mode it automatically directs the air out the heater vents. There is nothing wrong with your car. If you really want to be able to tell it where you want the air to come out, you have to upgrade to a 95+ HVAC system. I did this on my 93 SSE and it was one of the best things I did. Not that difficult, either. You need the ECC head and HVAC controller from a 95-99, then swap ‘em out.