Deep engine stumble when heater blower turned on?

PLUNDY

MEMBER
2003 TOYOTA RAV4
2.0L
4 CYL
4WD
AUTOMATIC
146,000 MILES

Hi,

My vehicle has a deep RPM stumble as if trying to stall when I turn on the heater blower. However, after a few seconds the idle stabilizes on its own. Haven't noticed this happen when I turn on headlights or wipers. Any suggestion what might cause this?
Thank you,
Peter L.

8 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

It sounds like your blower motor is starting to short out, to be sure let's unplug the blower motor to see if the problem still occurs. Here is the location of the blower motor and how to change it out in case you need it. Check out the images (below). Please let us know what happens.

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Thursday, February 2nd, 2023 AT 11:05 AM

PLUNDY

MEMBER
13 POSTS

Hi Ken,
As always much appreciated for your confirmation. About what I suspected but never experienced this problem in my 55 years of driving until now. Thank you!

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Thursday, February 2nd, 2023 AT 11:17 AM

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Yep, that is a good one all right, please let me know how it goes.

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Friday, February 3rd, 2023 AT 1:08 PM

PLUNDY

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13 POSTS

Will do! Got this page bookmarked for near future feedback. Best regards.

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Friday, February 3rd, 2023 AT 1:23 PM

PLUNDY

MEMBER
13 POSTS

Hi Ken,

It took a while for me to get around to this problem. So, the shop informed me that I have a seized A/C compressor. To fix this problem they said it will cost me $1,800.00. Does this price sound right to you?

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Monday, May 1st, 2023 AT 5:59 PM

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

It sounds a little high, here is the estimate from the book:

Compressor With Clutch Assembly 1.8 HRS @ shop rate

Compressor 883204208084 $585.78 new (you can find cheaper ones on amazon)

Here is one for $362.00 which included the new compressor and the condenser with oil and O rings:

https://amzn.to/40VXI7G

Here is a guide to help you with the vacuum down and recharge which should run about 1.0 hrs of labor plus refrigerant:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Check out the images (below). Please let us know what happens.

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