GoingHaam

Hello all, please help.

I have a 2015 Lexus RX350 and the heat on the passenger side is not working... everything else works fine.... the ac&heat on the front driver and rear work fine... the direction of air adjust on both sides as intended, but the passenger side is ice cold... any suggestions on how to fix this issue?

hfahmy

Check your coolant level

GoingHaam

that was literally the first thing i checked... the coolant is fine... but still no luck

RX in NC

Could be that the HVAC servo motor blend doors are stuck, blocking off the heat getting to the passenger side of the cabin.

Clutchless

Do a search using the term Servo (or blend door actuator) and you will find older threads discussing this issue.
Bottom line is that replacing or repairing them is a pain.

​​​​​​https://www.clublexus.com/forums/rx-...side-heat.html

GoingHaam

Do you know were the servo motor is located and how to access it?

GoingHaam

Thanks. it doesn't look like there was ever a resolution to that thread (even after the blend door was replaced) that was the driver side. Any idea on if things would be different on the passenger side? if so, how do you access it?

RX in NC

They are usually buried fairly far into the dash behind the HVAC vents. As previously mentioned, they can be a real pain to get to and you must be careful not to break the various plastic parts that must be removed in order to access them. If you decide to dive in, go slowly be careful, and document where everything fits.

GoingHaam

Im definitely not afraid to tackle it, if i had an idea what im looking for and exactly where...

Do you guys have an resource i can use to find this?

Clutchless

You will have to do some searching as described above to find any old threads here. I suggest you also do a youtube search for Lexus blend door actuator etc. There are some videos.
It involves much disassembly of the dash and digging underneath it to get at stuff. A lot of preparation is recommended before tackling this so you can get it back together so it works again.
I have never dealt with this and count it as one of those very difficult repairs where I would try to trade the car in before fixing it.

User874

I have had this same problem in a thread before...it is likely your servo motor blend door (sp?). It is a pain to fix as the whole dashboard has to come out and shops themselves will take at least a full day fixing it...usually a few grand to do due to labor.

Clutchless

See this
​​​​​​http://carspecmn.com/rx450hrx350-no-...de-blend-door/

GoingHaam

that is beyond scary.... i did partially disassemble my dash... some how my passenger blend door gear was off track and slipping out of the grove. I applied a bit a pressure with my finger until i heard the tooth snap in place... so far it been over a week working fine for a $0 fix... lets pray that is all it needed for a "forever fix!

jcfab

I have same issue - where is the passenger actuator located? How much disassembly did you have to do to see it? I can't find a YouTube video for this 3rd gen Rx or other description where passenger actuator door is located.