I've seen the problem posted online, but haven't seen anybody post an answer. There will be a slight amount of warm air on passenger side with the fan on high, otherwise nothing on the other settings. Problem only on passenger side, I have checked the coolant level, and it is a 2007. Looking to see how I can troubleshoot before, having to take it in. Blower motor? Thanks

Have you recently changed out your radio or took off your dash for any reason?
I ask, because I'm in a similar situation. Only cold air blows out of the passenger side in my car.
When I changed out my radio a while back, I might have blocked or broken a blend door while putting my dash back together. Living in Chicago, it's too cold to take my dash apart again to try and diagnose the problem. Will have to wait a few more months.

I popped off the front cover, to replace a bulb on the heater display, but don't think that affected the blend doors you mentioned. Similar issue here in Wisconsin. Too cold to break it down yet, hoping to hear if anybody else has had to deal with this.

Same issue, pretty sure its the blend door actuator. its a fairly common issue. I havent fixed it yet but looking at the part price i think its about 50 bucks. I also have no idea how hard it is to get to.. By the time i get around to it, it will probably be spring and ill forget until next winter.

I’m working out this exact issue now and completely baffled.

Confirmed Thermostat is good
Coolent level is good
Flushed Heater Core
Hot drivers left face and cooler moving to passenger
Cool air to rear vents
Cool air to passenger lower

Dealership is quoting $1650 to replace heater core due to being “clogged”. But, why would there be some “heat” if heater core is clogged?

I did add a new radio last summer, but I haven’t dug into it to check on alignment of vents. Has anyone ever figured out if it’s a blend door actuator or a savor or WTF else could it be?

Could be your evaporator leaking. Quick fix is to recharge the system. I've heard it's an inexpensive part, but the labor of getting to it is how the cost adds up.

Had same issue recently. Did all the research and was convinced it was heater core or blend actuator. Turns out my radiator was low on coolant even though my reservoir was filled correctly. Topped it off and it blows hot heat on passenger side.

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I have the same issue and recharging the a/c fixed it for a while for me. It didnt last 6 months now its only warm on the driver side.

hi, with respect to people's concern about interior cab heat (blowing warm on one side cool on the other) I too need help with this too

T4R not getting same temp from passenger side and driver side on "heat" settings. A/C settings seem to be equal.

(my T4R is a 04 V-8 limited with auto-temp control) I am in Canada, it gets cold here so the heat needs to work.

-If I select "hi" temp (max hot setting on both drive and passenger side) and use the climate control manually, I select heat location and the fan speed, then I get good solid warm air everywhere.

-If I select select "hi" temp (max hot setting) and then select the "auto" setting, then I get good solid warm air everywhere.

-* If I select select a value such as "26" temp and then select the "auto" setting, this is where the problem happens. example the driver side will blow at 26 deg C (79F), but the passenger side only blows at 19 deg C (66F) or cooler.

-at this point if I adjust the passenger side tempt to about 31, then both sides will be similar

-in the summer I do hear some random "gurgling" noise (or it maybe like a stripped plastic gear noise) that seems to come from behind the radio or behind the glove box

I feel like this should be more of a blend door or temp sync/calibration issue?

has anyone actually fixed this issue?

(my coolant is relatively new, it is full, it has been "burped", a/c works fine)

I was having heating issues recently and I cleaned the sensor hole by your right knee and my heater started functioning as intended. A little bit of dust had clogged up the sensor and was making the heater not function properly. FWIW, I have the blend door noises as well, but it's working again. Good luck!

Sensor hole? On passenger side? Any further guidance on this would be appreciated. Maine. Winter. Help!

Directly below the ignition switch are some little slots, mounted behind the slots on the trim panel is the cabin air temperature sensor, dust can clog the slots or the coat the surface of the sensor causing false temperature readings in the cabin, clean the slots and the sensor with a little compressed air or wiping it clean if you find it dirty or dusty.

Also sometimes the connector to the sensor can be a little loose, make sure it's clipped on properly.

Thank you! And this may be the reason for cold air on the two passenger side vents?

Probably not if it's only on one side of the vehicle, but if you're getting warm air on the driver's side but cold air on the passenger's side it sounds like you have a Limited model with "Dual Air" system, if so the passenger's air mix/blend door actuator/servo most likely needs replacing, because it's stuck and or not working and not moving the blend door to allow air from the heater core to enter that side.

There's HVAC actuators behind and to the left of the glove box, it's a pain to get to them and replace the bad one/s, if you listen closely you may hear either a clicking or buzzing sound of the bad actuator trying to work.

I have an SR5 without the dual zone. That’s why I’m stymied even more.