93 Lesabre, need more HVAC airflow

[Amopower]

The instructions on this older thread have links to pictures that do not exist anymore, so it is harder to follow. I also cannot tell if the instructions are for a 92-96 style, or a 1989 style.
I basically need to clean out whatever might be restricting airflow inside the cabin, and I'm guessing it is clogged evaporator core fins or heater core fins. Just need to figure out how to get in there and clean it.

http://www.automotiveforums.com/vbul...36#post5764636

[HotZ28]

Originally Posted by Sweepspear

This is exactly why the rule of not posting to old threads makes no sense.

I thought we just answered your question concerning this issue; CLICK HERE

The OP (original poster) did not complain about our “nonsensical rule” of posting in older threads, he simply followed the guidelines and started a new thread with a link to the older thread! At least he understands how the system works and did not complain about it!

When a new thread is started with a link to the older thread, it saves a lot of time reading through old post that are no longer relevant, or contain links to pictures that are no longer working! If you want to change how we handle “old threads”, I suggest you follow the process that BNaylor listed for you earlier. None of your post are contributing to the technical request of other members, therefore, if you continue to whine and complain, we will be more than happy to revoke your posting rights!

[BNaylor]

Actually one good reason not to raise old threads. We have no control over obsolete or non-functional links posted by members whether in old or new threads and I agree it has no bearing on the old thread rule.


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[HotZ28]

Originally Posted by Amopower

The instructions on this older thread have links to pictures that do not exist anymore, so it is harder to follow. I also cannot tell if the instructions are for a 92-96 style, or a 1989 style.
I basically need to clean out whatever might be restricting airflow inside the cabin, and I'm guessing it is clogged evaporator core fins or heater core fins. Just need to figure out how to get in there and clean it.

http://www.automotiveforums.com/vbul...36#post5764636

Follow the instructions in post #10 in the link above to remove the "blower resistor module". Once removed, look through the opening to see the evaporator core. Pics below should help. BTW, this does apply to the 91-96 models.

[spinne1]

Don't be surprised if you find that a mouse or mice have made a nice nest in front of your evaporator. I found that on my 92 that spent its early years in Minnesota and Wisconsin (amazingly rusty underneath car.) Of course if this was the case with you you might smell a bad smell when trying to run the ac/heat.

If you do find significant piles of debris, you may have to remove the blower motor to try and reach the debris with some kind of tool (maybe a toilet brush?) Or if it is REALLY bad you might have to remove the evaporator cover altogether. This is a fairly big job as it requires moving a bunch of stuff to get at it good. I did this on mine but I did it while my engine was removed and therefore it was not as big a deal. Mine needed to be removed as there was mice debris all over the inside of the evaporator cover and even on the other side of the evaporator a little. I ended up scraping the paint off the metal on the inside of the evaporator cover with a drill and wire brush to help eliminate any trace of mice or odor. Then I cleaned it with acetone. I'm not too worried about it rusting because it will take years to have any real affect and the car won't last that long.

[Amopower]

Well the advice got me there, but when I finally looked, it sure looks pretty clean to me. I didnt see anything clogging up the evaporator. What about the heater core being clogged up on the outside, although that shouldnt matter when the AC is on...
Now that I can get in there, I would like to get rid of a vinegar smell in the morning when the vents first start up. I was thinking of spraying Simple Green on the coil and hosingit off with hot water. What I dont know is will I be flooding out the inside of the car? Does this lead right to the inside?
Also - which way does the air flow? The blower motor is to the right of this picture. Does it pull air from left to right, or push it from right to left?

[HotZ28]

The evaporator looks fine. If you wash it out, it should drain to the bottom of the evaporator (fan) housing and through the outside drain. Be careful and do not use too much water pressure, or it will go to the inside! Notice in first pic below where the evap was removed. Look at the heater core on the left and the blend door that selects hot or cool air flow. Normally the door is open one way or the other, or somewhere in between. Air flow is forced through the evap first "from right to left" and then through the heater core, or if the door is closed, directly to the inside vents. You have several other doors and actuators under the dash to control air flow to the floor, center vents and the windshield. One of these could be your problem. The second pic is of the heater core exposed under the dash. Notice the blend door lever on top. (This one is missing the actuator). The third pic is the heater core box under the dash with cover in place.

Are you getting flow to the center vents? Do you have auto climate control, or manual control? Is your fan running on high speed? We need more info!
opcorn: