HomeDashboardFAQSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksMemberlistLog in
Share | 
 

 FAQ: HVAC Blower motor only works part time, or stays on

View previous topic View next topic Go down 
Go to page : 1, 2, 3, 4, 5, 6  Next
AuthorMessage
okiedrifter
Member
avatar

Name : Tyler
Age : 30
Location : Tulsa, Oklahoma
Joined : 2007-04-04
Post Count : 68
Merit : 2

PostSubject: FAQ: HVAC Blower motor only works part time, or stays on   Sat Aug 18, 2007 2:43 pm

on my 95 the ac will always do its thing, but the blower motor only works half the time, any ideas? and by the way, on the 97, the passenger side comfort is always hot unless you adjust it to total cold. but once there you can't change it at all. im lost?? ?
and sometimes i hear a clicking sound in my dash, like a clock. any ideas?
thx guys.
tyler sad
Back to top Go down
http://www.myspace.com/okie_drifter
99Rivman
Aficionado
avatar

Name : Randall
Location : North Carolina
Joined : 2007-01-16
Post Count : 2009
Merit : 87

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Sat Aug 18, 2007 8:50 pm

Not sure on the '95, sorry bonk that hasn't happened on mine?

On the '97, I had the same problem on my '99 and they are the same. There is an actuator behind the glove box that opens and closes to adjust the temp. on the passenger side, actually there is five of them in the system, I found that one stuck and it was always putting heat to the passenger side. There is a 7.5 volt, I think, motor in the actuator that got stuck on mine. I used some batteries and wires taped together and got mine working, and it has been fine ever since. Might be your problem too? thumbsup
Back to top Go down
http://www.cardomain.com/id/99Rivman
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Sun Aug 19, 2007 12:58 pm

Probably blower control module failure. It's a transistor mounted to a heat sink under the dash, attached to the blower motor. Common problem in our cars. $95 from dealer, $30 from salvage yard. Contact Ed Morad, he may have one in stock.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Brad95Riv
Member
avatar

Name : Brad
Age : 37
Location : Wisconsin
Joined : 2007-01-18
Post Count : 97
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Wed Oct 10, 2007 5:34 pm

So it's more common for the blower control module to fail than the blower motor itself, eh? Hmmm...I'll have to check my manual to see how to test these, as my blower motor only sometimes works.
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Wed Oct 10, 2007 8:03 pm

Yes, it's mostly the module that goes. It's a transistor that works like a speed controller, and it makes heat. My guess is, it gets too hot and then fails.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Mr.Riviera
Expert
avatar

Name : Matthew
Age : 30
Location : Florida
Joined : 2007-01-17
Post Count : 4336
Merit : 99

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Wed Oct 10, 2007 9:15 pm

you could replace it, then if it doesnt fix it return the part.
btw they get VERY hot for something thats not insulated under the dash :/ but i've never heard of one catching fire so i guess it's good.

_________________
1996 with 244k miles, L324" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs.
Back to top Go down
TType_Riviera
Fanatic
avatar

Name : Rob
Age : 34
Location : ohio
Joined : 2007-03-05
Post Count : 422
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Wed Oct 10, 2007 10:04 pm

the clicking sound you hear is the mixxer door servo, which contains plastic gears...my guess is its slipping... passenger side is easy to replace.but i recommend a bone yard replacement..dealer wants almost 200 bucks for it.....

usually if the motor resistor is bad...the blower wont run on a certain speed.....try banging on the blower motor housing when its not running..an see if it starts....if it does then my guess would be the motor is crapping out...
Back to top Go down
http://www.cardomain.com/ride/2131502/1
Brad95Riv
Member
avatar

Name : Brad
Age : 37
Location : Wisconsin
Joined : 2007-01-18
Post Count : 97
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Tue Oct 23, 2007 12:11 am

Still haven't looked into it much, but it seems to me like the blower motor itself is bad in my case. I can hear it clicking when it does work (doesn't sound like the vent door motors in my case). Is the blower motor under the passenger side kick panel?
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Tue Oct 23, 2007 1:30 am

It's under the passenger side dash, behind the black plastic cover.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Brad95Riv
Member
avatar

Name : Brad
Age : 37
Location : Wisconsin
Joined : 2007-01-18
Post Count : 97
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Mon Oct 29, 2007 12:46 pm

Thanks Aaron, I found it. I was procrastinating until I started to think about how horrible it'd be to not have a windshield defroster this winter! razz

If I grab onto the "knob" that sticks down and push/pull in one direction, the fan kicks in the way it's supposed to. I tightened the screws down that holds the blower motor in place, and at least it works a little now. But it still doesn't work at full capacity unless I push/pull it by hand. Trying to figure out if that means there is a connection problem (wiggled the wires around with no effect) or a problem internal to the blower motor (perhaps something in the electric motor itself), or something completely different. Regardless, it doesn't appear to be a problem with the blower control module, as it has been with others here. Hmmm....
Back to top Go down
Brad95Riv
Member
avatar

Name : Brad
Age : 37
Location : Wisconsin
Joined : 2007-01-18
Post Count : 97
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Thu Nov 08, 2007 10:08 pm

Well, I bought a used blower motor and put it in. So far so good! smile
Back to top Go down
robertwolf86
Fanatic
avatar

Name : robert
Age : 31
Location : new york
Joined : 2007-03-11
Post Count : 268
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Fri Nov 09, 2007 8:01 pm

the clicking noise could be the squirle cage in the blower motor, and the risiter controls the speeds on the dash for the fan that would not make a clicking.
Back to top Go down
Brad95Riv
Member
avatar

Name : Brad
Age : 37
Location : Wisconsin
Joined : 2007-01-18
Post Count : 97
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Sat Nov 10, 2007 5:01 pm

I'm pretty sure the bearing was going bad in the old unit. Hard to say for sure, but when I put the newer unit in, it worked without a problem. Of course, since I hit a deer the next morning, I guess it's a moot point.
Back to top Go down
96RIVMANN
Fanatic
avatar

Name : Paul
Location : MN
Joined : 2007-10-22
Post Count : 253
Merit : 11

PostSubject: No heat from blower motor!   Tue Feb 19, 2008 5:17 pm

I have been having problems on my 96 where the blower will not blow any air then again sometimes it would. Well, today it quite and will not come on. What should I be looking to be suspect? Blower motor, electronic control module on the dash or???????

Thanks


Last edited by 96RIVMANN on Tue Feb 19, 2008 7:31 pm; edited 1 time in total
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Tue Feb 19, 2008 5:21 pm

I'd start with the blower control module. It's a large transistor with metal fins located under the dash near the blower motor.

They are $100, but I found a used one for $30, which fixed my problem.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
96RIVMANN
Fanatic
avatar

Name : Paul
Location : MN
Joined : 2007-10-22
Post Count : 253
Merit : 11

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Tue Feb 19, 2008 7:38 pm

I pulled the car inside and had a look a few minutes ago. I checked all the fuses first and all was well. Then I pulled the plastic cover under the passenger side to access the blower motor. I then went to pull the connector and presto the blower starts blowing. I wiggle it around somemore and she seems to be intermittent. So I pulled the connector out of the blower motor and pulled each wire out of the connector and squeezed the terminal of each wire together to make better contact. All seems to be good now. Good thing because it's supposed to be -15F tomorrow morning. Shwee, I thought I was going to have to buy that control module but I guess not. joy


Last edited by 96RIVMANN on Tue Feb 19, 2008 7:41 pm; edited 3 times in total
Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Tue Feb 19, 2008 9:10 pm

Mine used to go on and off randomly until I fixed it. Hope yours continues to work properly.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
Rivlady
Amateur
avatar

Name : Sally
Age : 70
Location : New York
Joined : 2008-06-22
Post Count : 22
Merit : 1

PostSubject: Blower control module   Mon Jul 07, 2008 3:07 pm

My AC works but was told the blower control module needs to be replaced. Could I replace the blower control module easily, without a lift?
I've been quoted $450 by a gas station mechanic. frown
I called Delco, found out the part is about $82 and takes 1/2 hour to put in. Hey, I may be a woman, but I'm not stupid. razz I intend to buy a Haynes Manual for my Riv and do simple things myself.
By the way, looked on Haynes and there doesn't seem to be a Haynes Buick 1995 Riv manual. Maybe I'll find it on Ebay.
Back to top Go down
Chicken
Aficionado
avatar

Name : Mark
Age : 51
Location : Montana
Joined : 2008-06-13
Post Count : 1296
Merit : 8

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Mon Jul 07, 2008 4:31 pm

Does the fan turn on and off when you turn the AC on and off? If it does then I don't think you need to replace it, but I think its on the firewall somewhere and should be quite easy to replace....$450.00 bucks is crazy.
Back to top Go down
http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Mon Jul 07, 2008 5:53 pm

You do this from the interior, laying on the floor under the passenger dash. The blower control module is mounted next to the blower. Took me an hour to replace, cost $30 used from a scrap yard.

Good luck!

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
skuchin
Newbie


Joined : 2008-08-27
Post Count : 5
Merit : 0

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Fri Aug 29, 2008 12:36 pm

Where exactly would I find this blower control module? I can not see anything that loks like a heat sink, there is control of some sort going into heater housing, but I can't find any socket to fit the screws. (6mm too big and 5mm too small)
Back to top Go down
dreww
Junkie
avatar

Location : Dallas
Joined : 2007-04-10
Post Count : 851
Merit : 9

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Fri Jan 02, 2009 1:03 am

AA, is this what the blower control module looks like for the riv?



I dont see any heatsinks, and it looks nothing like this one for the regal

Back to top Go down
AA
Administrator
avatar

Name : Aaron
Age : 40
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18310
Merit : 239

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Fri Jan 02, 2009 10:07 am

This is what mine looked like. The heatsink is the big extruded metal part with fins:


_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
dreww
Junkie
avatar

Location : Dallas
Joined : 2007-04-10
Post Count : 851
Merit : 9

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Sat Jan 03, 2009 12:39 am

when looking under the dash, do you only see the black part where the wires connect? In other words, is the heatseak not visible until you pull out the module?

here is what I see under the passenger dash. The blower motor is pretty obvious, the large brass circular thing. To the bottom left of it is a wiring harness. Is that connecting to the blower motor control module?

BTW, my blower isn't working at all anymore. After reading my other thread, Is this still the culprit in your opinion?

Back to top Go down
ibmoses
Aficionado
avatar

Name : Bert
Location : North Alabama
Joined : 2008-02-03
Post Count : 1701
Merit : 32

PostSubject: Re: FAQ: HVAC Blower motor only works part time, or stays on   Sat Jan 03, 2009 2:21 pm

I think what happens, when the blower motor fails it ruins the control module/resistor at the same time, sometimes.
When the blower motor on my 2000 Regal failed I could remove it and tinker with it and reinstall it and get it to work intermittently. I finally replaced the blower motor and the control/module/resistor....

I hope I am not confusing everyone. I am not sure of the proper terminology for the part. It is the part AA posted a pic of and is located up under the dash near the blower motor.

Bert tavis
Back to top Go down
 
FAQ: HVAC Blower motor only works part time, or stays on
View previous topic View next topic Back to top 
Page 1 of 6Go to page : 1, 2, 3, 4, 5, 6  Next
 Similar topics
-
» FAQ: HVAC Blower motor only works part time, or stays on
» Write-Up: Blower Motor Control Module Replacement
» best 10 part time bowlers, in test cricket in the last 10 years
» How is this water getting in the Blower Motor(2000 Regal)?
» Blower motor vent tube

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   General Tech :: Interior-
Jump to: