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1997 Buick Park Avenue HVAC not blowing out of dash

97PA

Member
54
30
18
Buick Ownership
1997 Park Avenue
I have the same year and have had many HVAC issues over the years to resolve (blend and mode actuator faults, temperature sensor problems and a bad blower motor). This site will give you a lot of help if you search "HVAC Park Avenue" or use more descriptive words for your problem as a search key. Your problem sounds like a blower motor, blower motor control module and/or fuse (if you're not getting air flow out of any of the vents when you select each of mode selections). If you're not getting air out of the dash but the defroster and lower vents are working that could be the mode actuator. If the fan speeds aren't changing in response to the fan settings that could be a blower motor control module.
 

motomom

New member
2
0
1
Buick Ownership
1997 Buick Park Avenue
Thank you. I will do some more searching and I'm sure I'll find the information I need.
The fan motor works. The speeds change and the air temp changes as it should. But, arbitrarily, the air will blow like crazy out the lower vents, a little out of the defroster, and none out of the dash. We set the temp to 75 degrees, set the air flow to the middle (even though no air flows there), shut the control off and turn off the car. We unhook the battery for a few minutes, then hook everything back up and turn the engine on. We turn on the air control and everything works just fine for a few days or weeks. Then we have to start the whole process again.

I have the same year and have had many HVAC issues over the years to resolve (blend and mode actuator faults, temperature sensor problems and a bad blower motor). This site will give you a lot of help if you search "HVAC Park Avenue" or use more descriptive words for your problem as a search key. Your problem sounds like a blower motor, blower motor control module and/or fuse (if you're not getting air flow out of any of the vents when you select each of mode selections). If you're not getting air out of the dash but the defroster and lower vents are working that could be the mode actuator. If the fan speeds aren't changing in response to the fan settings that could be a blower motor control module.
 

97PA

Member
54
30
18
Buick Ownership
1997 Park Avenue
From your description, it could be a faulty mode actuator. There shouldn't be a redirection of air when not selected (commanded) to the defroster and lower vents when the system was operating normally through the dash vents. I'm a little concerned by the runaway fan speed when this happens and how it goes back to normal and resets after you remove the battery power, as that sounds like a HVAC programmer issue. If I had to guess at this point, I would lean towards a HVAC programmer problem.
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Boosted2004SC

Member
72
18
8
Iowa
Buick Ownership
2004 Park Avenue Ultra
97PA hit it, I vote for failing mode actuator too. FYI, it's a PITA to install under the drivers dash up in there close to the center console. I am a big fella and recently replaced my driver blend door actuator. I planned to tackle the cabin air filter and steering wheel position sensor so I even removed the drivers seat. Still a PITA and I was only able to replace the door actuator (reinstalling the cabin air filter was insanely difficult and I ended up removing the old one and putting the cap back on).

For not big fellas, the most common advice I read was to move your drivers seat all the way back, reclined back, flip your self upside down and lay your legs/feet in the seat while laying on the floorboard.
 

Patstin

Buick Newbie
5
0
1
Buick Ownership
Buick
I have a 92 park ave with dual air, the blower won't shut off even after removing the key. I have to unplug the motor or remove the fuse to turn it off. I believe I have to replace the resistor, but I can't find the location of the resistor. Can someone show me pictures where the resistor is located?
 

HotZ28

Full Member
7,427
500
113
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
I have a 92 park ave with dual air, the blower won't shut off even after removing the key. I have to unplug the motor or remove the fuse to turn it off. I believe I have to replace the resistor, but I can't find the location of the resistor. Can someone show me pictures where the resistor is located?
You should have started a new thread here, since this thread is not always relevant to the '92 PA. Anyway, the blower control module for the '92 is located under the passenger side hood, firewall side and on top of the blower box. You will have to remove the fuse/relay cover & then remove the the two nuts on the studs holding the same panel to the firewall, pull back then you can see it. It should have two terminals connected to it & 3-screws to remove. I have some pics of the location, but have yet to find them out of 4-k pics I have. It is easy once you gain access! If I find the pics, I will post later.
 

Patstin

Buick Newbie
5
0
1
Buick Ownership
Buick
Thank you so much. I am new, this was my first post, and I am not sure how to start a new post. I appreciate you responding and will look under the fuse/relay.
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