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Problem with heater on rende

MrEdog

Member
98
8
8
Tulsa, OK
Buick Ownership
2006 Buick Rendezvous CX 3.5L Fwd
I have a 2006 Rende 3.5L, and ever since i bought it (2 years ago) ive noticed the heat doesnt click on sometimes.
Example:
I can show a warm temp on the engine temp gauge, but no hot air will be coming out of the vents. I have to turn the Temp control dial all the way to cold and back to hot, usually a i have to do this a couple times til i hear a "Clunk" noise come from below the front dash. Then hot air starts coming from the vents.
Anyone know what this issue could be? Its been driving me nuts, as i feel like a lever or damper is getting stunk, then forced open to make the Clunk noise.
 
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MrEdog

Member
98
8
8
Tulsa, OK
Buick Ownership
2006 Buick Rendezvous CX 3.5L Fwd
Can you help me figure out which actuator it is? i found a system diagram for my Rende, and it lists 3 different actuators.

#10- Air INL Valve Actuator
#37- Mode Valve Actuator
#44- Temp Valve Actuator

ACTUATOR.PNG
 

TollKeeper

Active member
370
33
28
Brighton, CO
Buick Ownership
2004 GMC Envoy XUV, 2001 Pontiac Aztek
I believe you are looking for #44, which is the one for temperature control.

Mind you, depending on your HVAC, you could have 2 of them. If you have dual climate zones, than you would have 2 of them.

With single zone climate, you will have just one.
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MrEdog

Member
98
8
8
Tulsa, OK
Buick Ownership
2006 Buick Rendezvous CX 3.5L Fwd
I believe you are looking for #44, which is the one for temperature control.

Mind you, depending on your HVAC, you could have 2 of them. If you have dual climate zones, than you would have 2 of them.

With single zone climate, you will have just one.
Is this single? I think it is but not 100% 0D90CC6F-0919-484C-B25F-F47C099A3B5A.jpeg
 
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