lostinthew

My 98 GS3 has 125k miles. At the end of last winter the heat coming from the driver's side was not as warm as from the passenger side. Also, the heat from the driver's side middle vent was cooler than from the passenger's middle vent. I assume there is a problem with a servo motor (is that right?). This summer, the AC seems to work fine, so I can stall to get the repair done.

My question is, when I have one motor replaced, what else should I have done while they have it all apart? Everything else is working fine, but if I can prevent something inevitable from happening, I might as well get it done. Kind of like the water pump when doing the timing belt.

Any suggestions?

Percy

To repair just ONE servo motor is a HUGE job. Lexus will charge you 10 book hours for the work. The thing about the servo motor is that the entire dash has to come out as well as removal of the heater core since the feed pipes are in the way.

I had to replace out the evap core while I was in there as well as the expansion valve and the servo motor. Took me three 8 hour days of work. There's ALOT to it. While I was at it I also did the condenser (up front near radiator) and the high side line.

If you can live with the servo motor being kinda funky, then by all means do. At current labor rates it will cost you 1300 just to open it up. The servo motor is less than 200, but knowing the stealerships around here, they'll charge 200 or more just to mark it up.

lostinthew

Wow, thanks. Does the servo motor control direction only or direction and temp? What would account for the difference in temp from the driver's to passenger side?

Percy

There are three servo motors. One controls the drivers side, the other the passenger side. The third one is the main heat/cold mix. The drivers/pass side just "fine tunes" accordingly to temperature.

sivikvtec

WAT???!

OP do a search. You can change any of the servo's (there are 3 total) in a couple of hours without having to remove the dash.

evap core is an entirely different story though.

Percy

The main servomotor that will give the problem always seems to be the passenger side. Heater core lines are blocking access to the servo motor. I know...I had to replace mine while I was in there.

I stand corrected on the servo motor time replacement. Had to replace the evap core also.

lostinthew

Okay, so it still sounds like a big job - I'm not a DIY'er. I can live with the motor being a little weird, if there is a way to get full heat on the drivers side as well as the passenger side. The passenger side always delivers warmer air, even on full heat.

What d'ya think?

Thanks!

Rich23

iTrader: (3)

Which side is giving you problems exacty? The drivers side is the easiest... 20 mins max. 5/10 difficulty... The bigger you are though its harder (pause)... If you are a maller framed person with small hands you can get it done without any problems... Do a search as this OP said... There is tons on info on here... Been there once...

lostinthew

20 minutes? Even I might attempt that, although I'm not a small person. I'll do a search for the driver's side servomotor and see what I can find.

Thanks to everyone.

sakataj

iTrader: (182)

https://www.clublexus.com/forums/gs-...vo-motors.html