bg147: Hmmm. I have a 1996 C1500 and when I switch to defrost the sound of the
fan changes and I can hear the air blasting but the air only comes out from
below. Just a tad comes through the defroster which is a huge issue in the
Nathan Zupancic: Hannah, on the dual control climate controls, if one side still blows cold
and the drivers side blows hot, you need to replace the actuator that is
for the drivers side. It is actually just to the right of the transmission
hump under the dash. I need to replace one in my truck, but I've been told
it is a half hour job.
SuperBakery10: Great video. My parent's 99 suburban the air is doing exactly this. My dad
thinks the control is crap but now I'll tell him about this.
Kyle Spitnale: Mine only coms out the defrost and a little out the top vents all the time
no change nuthing on the floor what do I have to replace and where is it
Accumulator1: My blend door actuator went out in the middle of hot and cold selection.
The AC would not blow very cold and then winter hit and froze my ass off
because no hot air. That flap door was not closed to allow heat to be drawn
from the heater rad. Took that lousy bulky plastic cover off the bottom
and the actuator was wedged close to the carpet floor. It did not cost me
anything to repair the actuator. I took it apart for inspection. The main
diode, a 1N4004 was faulty. I just happen to have one in my parts supply
to swap out. Next main task was to realign the gears in the actuator. Took
forever to get it indexed again. Finally got it like it suppose to be and
installed it. Works perfect again. A pain in the ass was to put back the
large bottom cover.
claudeham9: i have a 2000 chevy tahoe it reads 200 - 210 but no heat is this whats
wrong with my truck?thanks in advance
Paul: Thanks man! Sometimes my truck will stay on the floor and not come our then
vents and have to wait like 5 mins and a tap on the dash makes it come kit
tjconway6462: Ok, thanks. I understand the procedure, just can't seen to get any tools on
the bolts to remove the actuator. Its a tight area.
Aaron Hinojos: thank you sooooo much for this video!!!! had nooooo idea what so ever what
controlled were the air went .... didnt even know what to type to look for
lol... just googled some stuff like blower motor some how ran across your
video>>> watched it .. ran to orileys ... bought the part .. put it in..
worked great!!!!!...... great video man!!! thank you!
WhoSaidTyler: You may try taking out the accessory plugs there in the center. Be careful
though, that plastic isn't strong.
WhoSaidTyler: jeez.."blend" door.
WILLIAM CORLEY II: Thanks for the video it was very helpful with changing my 02 Tahoe mode
WhoSaidTyler: Most likely the panel. I would confirm system charge and also see if a
command is being sent to the compressor to turn on during the times that it
isn't responsive before you spend the money for a control panel. You may
also be able to repair the panel yourself.
gazzellanorm: help!!!!!! is there a way to manually lock the hvac actuator on hot in my
chevy blazer ' 99
gazzellanorm: @WhoSaidTyler, Thanks I'll try to dismount and block.
419MrSmith: Both my actuators tend to have a mind of their own and move whenever they
please. I was thinking about replacing the one at the blend door until I
realized the one on the floor moves funny too. Maybe I just need to replace
the control unit. My system is pretty much the same as yours, it's a 95
gmc. Nice vid, thanks!
WhoSaidTyler: Blend door controls hot or cold...your problem sounds like the mode door
actuator which is the one I replaced in this video. Rule about not running
them detached from the box still applies.
FABRIC8TIONUNLIMITE1: My truck (only when I turn it on or off) I get a repetitive CLICK CLICK
CLICK down by the heater fan, I found a actuator on the left side of the
fan and unplugged it & it stopped. I just replaced the heater fan the other
day cause it was squealing like a banchie & inside the box I saw a flap, I
sure that was the noise. Is that the third actuator? Have you ever heard of
this prob. ?
osito6549: I have a 1998 Chevrolet S-10 reg. 4 cyl. I don't get any air out of the
floor setting. It only blows out of the defrost. heat works fine everwhere,
except floor. NOTHING blows out the floor vent. If I put it on floor, it
blows out the dash Any idia or suggestion? Thanks
chrisflowers1984: I have a 99 surburban and the air is blowing to the floor and now the
control panel out to it want light up nothing so do I need to.replace both
Jpait94: I have a problem with my 96 sierra my AC went out and Idk why. I think its
my AC control unit bc I had problems with it before and to turn the lights
to the AC and recirculate buttons off I would have to wiggle the power knob
to the unit. All it does now when I turn my ac on is it blows air. not cold
or hot it blows down to the floor and out the side vents I noticed that it
blows out my main vents for a second when I turn the AC off for a second
and then back on again. Thank you for any help!
WhoSaidTyler: You simply turn the actuator in your hand until you can slide it on the
shaft. DON'T try to manually turn the inner workings of the actuator.
sbeer6er: It didn't engage at all, but now when I hooked it up to force it, it slaps.
I'm pretty sure it will break something in there now, lol.
WhoSaidTyler: @gazzellanorm Ah. Well just remove the appropriate actuator(on a full size
it is the one mounted front and center) and use something like strong tape
to hold the shaft in the right spot. Remember to not operate the new
actuator until it is mounted to the HVAC box and don't turn the actuator by
Mookie Smith: i had same problem and my actuator behind cigarette ligher was bad ,, all
the mechanical parts worked but i open it up and one of the wheels and
axles was split in half and that half was wut i needed to reach the cold
jhowell928s: When you pull off the motor that selects which vents the air comes from,
behind it you'll see a white lever/knob. It's actually what the motor uses
for selecting positions.
TheDeathatron: I have a 99 same body style as yours. My ac works but doesn't get very
cold. The freon levels are normal. Do you think it's the blend door going
out that's mixing warm/cold air? Also there's a intermittent click every
30secs near that area.
713rmx: Thank you very much for this video!! Now I know what's wrong with my ac!!
Will be fixing it this weekend.
WhoSaidTyler: No, I'm sorry I don't, but it's the same procedure. Sytem off, ignition
off, remove fasteners. Replace with new part by rotating shaft to enable
actuator to slide on and bolt in. Do not operate actuator with it off the
John Sigler: I am new at posting comment so forgive me as i learn.The syndicated
brothers car/talk could not help a lady with that knocking noise. It still
occurs as you walk away from the car.or just fooling around with the
control system knobs and features.Any way your video enabled me to have her
guns loaded when dealing with the service righter,they messed her around so
much she did not have the extended warranty But the coded the repair and G
M ate it near 1k in the book.Thank you so much with all yado
stacie Phillips: Thank you so much! My son now has AC and Heat and is no longer stuck on
Gearheadtom: @WhoSaidTyler I checked mine, and it doesn't seem to even turn quite 1/4
turn all the way from one knob position to the farthest. I'm guessing it's
supposed to move more than that.
ghtowagon: Did yours have a SLOW engagement of the change over from the dash defrost
vents to the upper front vents? Mine does it, The flapper door is slow to
change and when it does it goes "SLAP"
jchavez8807: I have 2004 chevy and the drivers side goes hot about every other day,
passenger side stays cool...I'm guessing this is the blend door problem,
correct? Is the blend door just as easy to change?
John Artuso: Will this procedure work on my 97 K1500 ? .. maybe a stupid question but ya
never know :) My issue is that I have air coming thru on my body vents when
all I want is the defrost to work I changed the control panel last week
jhowell928s: Actually, what you were saying at the 7 minute mark about not running the
motor while it's off the box isn't true. The motor won't turn past a
certain point on or off the box. I've done it before when I was trying to
diagnose the problem in mine. My problem was actually the control panel
wouldn't "tell" the motor to turn far enough to make it blow out the dash
vents only. For a while I just pulled it off and if I wanted to switch the
position I'd reach under the dash and turn the lever.
Michael Madsen: Thanks a lot, I am diagnosing my heating issues right now and I am pretty
sure it is the blend door, but I have a question. So when I shift from
inside circulation to out side air I hear everything shifting and working
fine. Is that what the blend door does? How do I check if it is the blend
door or something else. I didnt quite understand what part you where
referring to that sits underneath the controls on the dash board.
Jim Lowey: Hello, I have a 1998 K1500 and recently replaced my heater blower fan.
Since doing so, the defrost does not blow very hard on the passenger side,
probably only about 25% of what it did before changing out the motor. All
other functions work great and normally. Just the Defrost is having this
issue. Any ideas of what would have caused this and what I can try to
repair? I did notice that the rubber cover that encloses the blower was a
real pain to get back on after replacement. Thanks!
SuperHBlaze: Is this is the same for a non- A/C unit?...Can't find a cable driven door
actuator (if that is what I am looking for) what I find are all equipped
for a/c and are electric. This truck is a '97 and was special order with no
air conditioning and the door actuator was missing when it was bought a few
months ago and noticed only now. I do not have a part number either to
research it at different sites.....please help!
dee keller: I have 95 WT1500 and I have HOT to blow out of the vents and floor but when
I change to defrost it goes to AC cold with the temp set on hot. Have you
had any dealings with this?
joanben1977: Just changed mine on my 97 Z71. This video was very very helpful. Thank you
Hannah Davey: my 2004 Chevy SUV has the dual controls where the driver side will suddenly
blow Screaming hot air in the summer, (when you need AC). it sounds like my
issue might be the "blend door" - does that sound like a good guestimate to
WhoSaidTyler: Yes. They are known to burn up and when that happens they either burn up
partially or all the way. The way to diagnose this is to use a good digital
multimeter on the correct scale(usually 20v) and disconnect the connector
at the actuators. With the key on and the HVAC controls being operated, you
should see voltage changes at the connectors. If you don't then you can be
pretty confident the panel is DOA. Check G M parts direct.
WhoSaidTyler: You are welcome, glad to help.
arkansasbrent: My yukon has a similar issue. I have to turn the vent on max and turn the
selector knob back and fourth sometimes to get it to switch vents. Is that
a sign i need a knew one of these?
WhoSaidTyler: You have actuators just like the later trucks. I had a 1993 Chevy that was
my favorite of all.
WhoSaidTyler: It has to move more than that. That one is the blend door actuator. If you
remove it and work the blend door by hand you'll get cold or hot air.
WeBleedCrimsonRTR: sorry to sound like an idiot but where is this lever?
WhoSaidTyler: I'm glad to help! It has shocked me how many people seem to be having
problems with these. However, it's an easy fix after you understand what
those little troublemakers do.
Chevrolet C/K truck mode and blend door actuator replacement4.5
out of 5