Climate Control groaning noise
02-07-19, 03:02 PM
#1
Driver School Candidate
Thread Starter
Climate Control groaning noise
Has anyone encountered this issue with their climate control where adjusting the temperature between hot -> cold, and cold -> hot makes a groaning noise? It's very intermittent, and seems to happen more frequently on cold starts. Sometimes it even makes that groan noise with the climate control off. After driving a bit, or the car has warmed up, it goes away.
I've taken to the 2 different Lexus dealers, but they've been unable to pinpoint what is causing that sound.
Here is a video
https://streamable.com/auygp
Any suggestions?
I've taken to the 2 different Lexus dealers, but they've been unable to pinpoint what is causing that sound.
Here is a video
https://streamable.com/auygp
Any suggestions?
02-07-19, 04:25 PM
#4
Sounds a little 'gassy' to me. Lol. Ok, ok. Could not resist. Lol
Mine is much softer in sound. Not loud and farty sounding like in the video. Maybe a servo or something caught on a flap in there when it's opening / closing.
Mine is much softer in sound. Not loud and farty sounding like in the video. Maybe a servo or something caught on a flap in there when it's opening / closing.
02-07-19, 05:03 PM
#5
Driver School Candidate
Thread Starter
lol, there have been a few times my passengers thought someone farted in the car. I don't know if it is worth chasing this issue any further as others have a similar problem
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E46CT (02-08-19)
02-07-19, 06:46 PM
#6
Instructor
Has anyone encountered this issue with their climate control where adjusting the temperature between hot -> cold, and cold -> hot makes a groaning noise? It's very intermittent, and seems to happen more frequently on cold starts. Sometimes it even makes that groan noise with the climate control off. After driving a bit, or the car has warmed up, it goes away.
I've taken to the 2 different Lexus dealers, but they've been unable to pinpoint what is causing that sound.
Here is a video
https://streamable.com/auygp
Any suggestions?
I've taken to the 2 different Lexus dealers, but they've been unable to pinpoint what is causing that sound.
Here is a video
https://streamable.com/auygp
Any suggestions?
02-08-19, 12:58 AM
#7
Intermediate
The following users liked this post:
E46CT (02-08-19)
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02-08-19, 04:44 AM
#8
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
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Check out this:
https://static.nhtsa.gov/odi/tsbs/20...32645-9999.pdf
https://static.nhtsa.gov/odi/tsbs/20...32645-9999.pdf
Before I read the Tech Tip I was going to say it sounds like the servo/blend door for the heat when the temp is adjusted...which is pretty much what the Tip is saying that is causing the noise.
02-08-19, 10:49 AM
#9
Driver School Candidate
Thread Starter
No, my evaporator core was never replaced. I purchased the car new, and the noise started occurring between 5k and 10k miles. It's been making this noise since then, I'm at 45k miles now. I'm planning to take it back to the dealer again and have them look at it once more. If they are unable to fix it, then I'll probably decide to just live with it.
Is the servo/blend door easily accessible and replaceable? I tried researching some videos or pictures for instructions, but didn't come across any for my model.
Is the servo/blend door easily accessible and replaceable? I tried researching some videos or pictures for instructions, but didn't come across any for my model.
02-08-19, 11:05 AM
#10
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
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I would take the video to them and reference the Tech Tip...pretty hard for them to dodge that.
Plus they'll know when they replace it to take out the extra packing pad.
I see it as a win win all around.
Some servos are somewhat easy to replace, but the doors are inside the box.
Only way to access them is to take the entire box out...which means taking the entire dash out.
Plus they'll know when they replace it to take out the extra packing pad.
I see it as a win win all around.
Some servos are somewhat easy to replace, but the doors are inside the box.
Only way to access them is to take the entire box out...which means taking the entire dash out.
02-08-19, 04:44 PM
#11
Intermediate
Yep, you will have to remove the head unit to access the blend door servo.
It could be that they never removed the plastic when they did the install, and only after 5-10k miles did it start to wear and become a problem.
It could be that they never removed the plastic when they did the install, and only after 5-10k miles did it start to wear and become a problem.
03-01-19, 01:50 PM
#13
Driver School Candidate
Thread Starter
Hey guys, want to follow up on this one.
I took my car to Lexus Dealer, and of course my car decides to be shy. So I left it with them for a week, and just got it back today. I haven't heard the noise today, and the repair was covered under the basic warranty
Here is the note for the invoice
Fingers crossed that it doesn't come back
I took my car to Lexus Dealer, and of course my car decides to be shy. So I left it with them for a week, and just got it back today. I haven't heard the noise today, and the repair was covered under the basic warranty
Here is the note for the invoice
CONFIRMED NOISE WHEN SWITCHING TEMPERATURE. FOUND NOISE COMING FROM SERVO MOTOR. CONFIRMED
NOISE WHEN SWITCHING TEMPERATURE. FOUND NOISE COMING FROM SERVO MOTORS AREA. INSTALLED MODE DOOR SERVO BUT
NOISE DID NOT GO AWAY. INSTALLED DRIVER SIDE TEMP MODE SERVO MOTOR AND OPERATED TEMP INDIVIDUALLY. DRIVER SIDE
NOISE IS QUIET BUT PASSENGER SIDE IS STILL MAKING NOISE. INSTALLED PASSENGER SIDE TEMP MODE SERVO MOTOR BUT
NOISE IS STILL PRESENT. NOISE IS COMING FROM MECHANICAL DOOR INSIDE EVAPORATOR BOX. REMOVED DASHBOARD AND
REPLACED EVAPORATOR BOX ASSEMBLY. NOISE IS NO LONGER PRESENT. RECHARGED A/C SYSTEM AND BLED COOLING SYSTEM.
OKAY NOW.
NOISE WHEN SWITCHING TEMPERATURE. FOUND NOISE COMING FROM SERVO MOTORS AREA. INSTALLED MODE DOOR SERVO BUT
NOISE DID NOT GO AWAY. INSTALLED DRIVER SIDE TEMP MODE SERVO MOTOR AND OPERATED TEMP INDIVIDUALLY. DRIVER SIDE
NOISE IS QUIET BUT PASSENGER SIDE IS STILL MAKING NOISE. INSTALLED PASSENGER SIDE TEMP MODE SERVO MOTOR BUT
NOISE IS STILL PRESENT. NOISE IS COMING FROM MECHANICAL DOOR INSIDE EVAPORATOR BOX. REMOVED DASHBOARD AND
REPLACED EVAPORATOR BOX ASSEMBLY. NOISE IS NO LONGER PRESENT. RECHARGED A/C SYSTEM AND BLED COOLING SYSTEM.
OKAY NOW.
03-01-19, 02:49 PM
#14
Intermediate
Looks like it was due to the evaporator box... I wonder if it was left-on plastic that was causing it.
03-01-19, 03:05 PM
#15
Driver School Candidate
Thread Starter
Yeah, it does look like it. I've never had the evaporator box replaced until today. Wonder if they forgot to remove it during the car manufacturing process
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