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Old Mar 30, 2022 | 04:34 PM
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Rake's Avatar
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This sound started when…

My heater control valve was sticking, so id
manually move the cable, well I bent cable a little forcing it…since then ive replaced the heater control valve and found a perfect cable at a pick a part and replaced the bent one…yet ticking is worse and begins with key in on position and goes away after a few seconds after I crank the ride

https://youtu.be/-T5wU6LV1sc



Last edited by Rake; Mar 30, 2022 at 04:48 PM.
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Old Mar 30, 2022 | 04:50 PM
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Old Mar 30, 2022 | 05:51 PM
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Originally Posted by Rake
since then ive replaced the heater control valve
You also get this from the junkyard?
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Old Mar 30, 2022 | 06:54 PM
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That looks like the air mix control motor assembly? Number 6 on the link below.
Heater Unit - 2003 Acura TL 4 Door TYPE-S (NAVI) KA 5AT (acurapartswarehouse.com)

Seems like something may be binding or the motor is kaput?
Below is what the Helms has on the subject if it is the air mix motor assembly:


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Old Mar 30, 2022 | 07:06 PM
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Originally Posted by Karanx7
You also get this from the junkyard?
that was new. Looked everywhere online for the cable, no dice. So pick a part had a nice one, maybe i bent the heater control valve bracket
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Old Mar 30, 2022 | 08:17 PM
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Can you open and close the valve by hand with the motor disconnected? It could be a bad new unit. The gear teeth get brittle over the years and break easily.
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Old Mar 31, 2022 | 04:17 PM
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Originally Posted by Karanx7
Can you open and close the valve by hand with the motor disconnected? It could be a bad new unit. The gear teeth get brittle over the years and break easily.
yep its functioning as it should
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Old Apr 1, 2022 | 08:25 AM
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I had the same sound coming from under my glovebox and it turned out to be some broken teeth on the gear in the mix control box. Did you take out the box and examine the gears inside? All I had to do was rotate one gear inside the box so that the good teeth were being used as it only uses a portion of the actual gear. I believe the way to trouble shoot this is to see if the clicking sound happens when the car is and the air is on and you turn the temp gauge from hot to cold and vice versa.

Here's a quote about the process from Acurazine member sniz:

The motor is under the dash on the passenger side upper left, with a green connector.
Remove three 8mm screws (I had to unplug the middle ECU connector to get at the rear one)
Use a flat blade screwdriver to pry the plastic lever from the motor shaft.. take note of the position of the linkages.
The gearbox is held together with plastic clips. They're brittle.. I broke all but one, but it doesn't really matter - it goes together pretty tightly, and when you put the motor back in, the mounting screws will hold it together.
Carefully pry the gearbox halves apart, so the gears don't fall out.
Remove the circuit board on top of the large gear. If the broken tooth is on this gear, you can turn it 180 degrees and put it back in. There are 2 sets of 3 brushes that ride on the circuit board like a potentiometer for position feedback. They're exactly the same, so it doesn't matter if their position is reversed.
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Old Apr 1, 2022 | 11:38 AM
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Originally Posted by Davius
I had the same sound coming from under my glovebox and it turned out to be some broken teeth on the gear in the mix control box. Did you take out the box and examine the gears inside? All I had to do was rotate one gear inside the box so that the good teeth were being used as it only uses a portion of the actual gear. I believe the way to trouble shoot this is to see if the clicking sound happens when the car is and the air is on and you turn the temp gauge from hot to cold and vice versa.

Here's a quote about the process from Acurazine member sniz:

The motor is under the dash on the passenger side upper left, with a green connector.
Remove three 8mm screws (I had to unplug the middle ECU connector to get at the rear one)
Use a flat blade screwdriver to pry the plastic lever from the motor shaft.. take note of the position of the linkages.
The gearbox is held together with plastic clips. They're brittle.. I broke all but one, but it doesn't really matter - it goes together pretty tightly, and when you put the motor back in, the mounting screws will hold it together.
Carefully pry the gearbox halves apart, so the gears don't fall out.
Remove the circuit board on top of the large gear. If the broken tooth is on this gear, you can turn it 180 degrees and put it back in. There are 2 sets of 3 brushes that ride on the circuit board like a potentiometer for position feedback. They're exactly the same, so it doesn't matter if their position is reversed.
thanks ill give that a shot.
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Old Apr 5, 2022 | 10:26 AM
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I'd like to add...you'll more than likely find that the "water valve" which this motor operates to be quite old and doesn't close as easily as it once did. Updating that part is worth considering as it's difficult operation adds to the wear of the gear inside the air mix motor. I did mine and the hosing leading to it for added peace of mind since i use my car for long trips.
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