Toyota Rav4 EV Forum

It is currently Mon Nov 20, 2017 10:05 pm

All times are UTC [ DST ]




Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Need advice: High revving noise when A/C on at startup?
PostPosted: Mon Jul 17, 2017 2:23 pm 
Offline

Joined: Sat May 11, 2013 9:28 pm
Posts: 3
Hi - I have a 2012 RAV4EV that just hit 50k miles after almost five years. It's been a really hot summer where I live (105-110 degrees) and something odd has recently manifested. If I start the car with the A/C off, everything is normal and quiet. When I first start the AC for about the first 15-30 secs, there is a subtle revving noise that has a similar sound as if you were to step on the accelerator in an ICE car in neutral. It's not nearly as loud or noticeable, and it's a constant pitch but then it goes away. In perspective, it's quiet enough where it's hard to hear over the AC cabin noise so you have to listen for it, but it seems to be something you can also feel in the accelerator for a few moments. Almost feels like you're driving at a high RPM and ready to shift gears. ...and then it goes away after a few seconds. FWIW, the AC itself works great with normal cold air, fan speed, etc.

Any thoughts as to whether this is no big deal, or a developing problem thst should be preemptively dealt with?

Thanks and appreciate any insights,

RobbW


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Mon Jul 17, 2017 6:20 pm 
Offline

Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1605
Location: Los Altos, CA
My car also does this. I have noticed that at low road speeds like 25mph I notice this revving noise. When I stop at a traffic light it stops, most likely because it would be really intrusively noisy when the car is stationary. I am pretty sure the noise is from the fans for the A/C system. I think it's no big deal and working as intended.

_________________
2012 Shoreline Blue #1462 w/JdeMO | 4.32kW Motech/Enphase PV Solar | Leviton EVB40 40A & Jesla Home Charging | 2015 Limestone Gray e-Golf LE


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Tue Jul 18, 2017 2:39 am 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3868
Location: San Diego
Probably the variable speed compressor for the air conditioning.


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Tue Jul 18, 2017 5:34 am 
Offline

Joined: Sat May 11, 2013 9:28 pm
Posts: 3
Thanks to both of you for the feedback.

Tony, in your opinion when you say the VSC, is that "normal" behavior, something that should be fixed while we can, or something that may just need to be replaced...eventually?

(If it's the latter, is that a particularly costly fix)?

Thanks again,

RobbW


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Tue Jul 18, 2017 5:35 am 
Offline

Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3868
Location: San Diego
Yes, normal. Pump and fans at full speed.


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Tue Jul 18, 2017 6:35 am 
Offline

Joined: Sat Mar 30, 2013 9:20 am
Posts: 691
Location: Seal Beach, CA
Just chiming in to say that mine does the same thing. If I turn the fan down a bit that'll usually resolve it.

_________________
ImageRavCharge.com | 2012 Classic Silver | 2011 Leaf | Clipper Creek CS-60 | 40 amp openEVSE | 3.84kw PV


Top
 Profile  
 
 Post subject: Re: Need advice: High revving noise when A/C on at startup?
PostPosted: Wed Jul 19, 2017 5:14 am 
Offline

Joined: Sat May 11, 2013 9:28 pm
Posts: 3
Thanks all - I feel much better now!

RobbW


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
cron
© Toyota Rav4 EV Forum - part of the MyElectricCarForums.com Group