Wood ****** in my AC/Heater housing?

Diddly · 06-27-2008, 10:05 PM

Howdy folks, Diddly here. I have a 94 Sierra 4X4 with Z71 pkg. Lately when I turn the ignition switch on and for maybe 45 seconds there is a noise that sounds like a Woodpecker knocking away in the heater housing. Been told that maybe it is a bad AC/Htr Blend accuator and that it maybe necessary to R & R the dash to replace it? Does that sound right? Can it be disabled and left quiet where it is?

Thank You
Diddly here in the eastern Sierra/Nevada Mountains, Gardnerville, NV

leolkfrm · 06-28-2008, 09:29 AM

Sounds like the fan going bad, pull the glove box and r&r it.

Diddly · 06-29-2008, 04:23 PM

Thanks for the suggestion on the heater fan, I diconnected the Heater fan motor and it made no difference. Woody woodpecker is still there.
diddly

mudseeker · 06-29-2008, 05:04 PM

have you tried some bird shot on the pesky critter?

leolkfrm · 06-29-2008, 05:04 PM

usually you have a hard time hearing the electric actuator when it sits there trying to move the door, does it change tone when you change the temp from hot to cold and back?

Diddly · 06-29-2008, 08:32 PM

Changing from direct to recirculate while it's making the noise. It will stop the noise temporarly, after a short rest, bout 10 seconds it starts up again.

leolkfrm · 06-30-2008, 06:10 AM

So then its the controller for the cab air recirculation find it and unplug it, I think it defaults to outside air, should be on the pass side around the blower motor

tjzz4 · 06-30-2008, 09:28 AM

It is the blend door actuator motor....

Diddly · 06-30-2008, 11:08 AM

Thanks to all who helped with the diagnosis on my woodpecker problem.

Semper Fi 1952/1957

usmceric1 · 07-02-2008, 06:40 AM

I have the same noise in my truck. Let us know how you fix it.

06-27-2008, 10:05 PM	#1 (permalink)
Diddly Junior Member Join Date: Jun 2008 Location: Suthn half of Nortern Nevada Posts: 6	Wood ** in my AC/Heater housing? Howdy folks, Diddly here. I have a 94 Sierra 4X4 with Z71 pkg. Lately when I turn the ignition switch on and for maybe 45 seconds there is a noise that sounds like a Woodpecker knocking away in the heater housing. Been told that maybe it is a bad AC/Htr Blend accuator and that it maybe necessary to R & R the dash to replace it? Does that sound right? Can it be disabled and left quiet where it is? Thank You Diddly here in the eastern Sierra/Nevada Mountains, Gardnerville, NV

06-29-2008, 04:23 PM	#3 (permalink)
Diddly Junior Member Join Date: Jun 2008 Location: Suthn half of Nortern Nevada Posts: 6	Woodpecker in my AC/HEATER housing. Thanks for the suggestion on the heater fan, I diconnected the Heater fan motor and it made no difference. Woody woodpecker is still there. diddly

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06-28-2008, 09:29 AM	#2 (permalink)
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 656	Sounds like the fan going bad, pull the glove box and r&r it.

06-29-2008, 05:04 PM	#4 (permalink)
mudseeker Moderator Join Date: Feb 2006 Location: michigan Posts: 3,637	have you tried some bird shot on the pesky critter?

06-29-2008, 05:04 PM	#5 (permalink)
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 656	usually you have a hard time hearing the electric actuator when it sits there trying to move the door, does it change tone when you change the temp from hot to cold and back?

06-29-2008, 08:32 PM	#6 (permalink)
Diddly Junior Member Join Date: Jun 2008 Location: Suthn half of Nortern Nevada Posts: 6	Changing from direct to recirculate while it's making the noise. It will stop the noise temporarly, after a short rest, bout 10 seconds it starts up again.

06-30-2008, 06:10 AM	#7 (permalink)
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 656	So then its the controller for the cab air recirculation find it and unplug it, I think it defaults to outside air, should be on the pass side around the blower motor

06-30-2008, 09:28 AM	#8 (permalink)
tjzz4 Senior Member Join Date: Oct 2007 Posts: 196	It is the blend door actuator motor....

06-30-2008, 11:08 AM	#9 (permalink)
Diddly Junior Member Join Date: Jun 2008 Location: Suthn half of Nortern Nevada Posts: 6	Thanks to all who helped with the diagnosis on my woodpecker problem. Semper Fi 1952/1957

07-02-2008, 06:40 AM	#10 (permalink)
usmceric1 Senior Member Join Date: Aug 2007 Posts: 82	I have the same noise in my truck. Let us know how you fix it.