My 2005 Acura RL heater blows cold air on the driver's side and hot air on the passenger side and the back - both sides are set to hot. The self...

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Customer

My 2005 Acura RL heater blows cold air on the driver's side and hot air on the passenger side and the back - both sides are set to hot. The self diagnostic shows the temperature sensors are working properly, the passenger side air mix is open 100% and the driver side air mix is open 112.5%. What is wrong?

Last updated 12/21/2019

Charles Totherow

Acura Mechanic

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Last updated 12/21/2019

Charles Totherow

Acura Mechanic

If the ac or heater is blowing hot on the driver side and cold on passenger side or blows cold on the driver side and hot warm on passenger side. Many cars have dual climate controls and as a result they will have 2 actuators that will switch from hot to cold and the other way around. If one of the blend door actuator is not working you will not be able to adjust the temperature on this side and it will stay on hot or cold ( depending on what position it quit)

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Here is a video on how to resolve the problem as well.

https://youtu.be/KOpIKoig8YI

Posted 12/21/2019

Customer

I'll watch the video.

The local honda dealer told me to replace the compartment heater coil - for just under $2,000. That didn't sound right to me.

Does this mean the blend door actuator on the driver's side is likely bad? Is that the reason for the strange reading for the position (112.5%) during the self-diagnostic?

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Yes it it.

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Sounds like the problem to me as well.

Posted 12/21/2019

Customer

I've got the repair manual from Acura and have found the photo of the passenger-side blend actuator. Looks like i have to remove the panel below the glovebox on the passenger side. Any tips for finding where the actuator actually sits?

Posted 12/21/2019

Charles Totherow

Acura Mechanic

This should be in the vidoe I will try to find directions as well in wriiten format.

Posted 12/21/2019

Customer

What confuses me is the air conditioning works fine. Only the heater has this problem.

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Most likely cause is the blend door actuator

Posted 12/21/2019

Customer

Okie dokie. I'll give that a try. Looks like a new motor is on the order of $130 and would take a couple days to get here. Is there some way to just set it so it blows warm air until I get a new motor?

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Non unless you can manually adjust after taking the panel off.

Posted 12/21/2019

Customer

Ok. Thanks.

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Trying to manually adjust may break the unit all together.

Posted 12/21/2019

Customer

I'll try to be patient then.

Posted 12/21/2019

Charles Totherow

Acura Mechanic

Dear Lee , It was a pleasure helping you with your Acura issue today. Here is a summary of the resolution.

Issue identified :

Customer needed help with heater blowing cold air

Solution Implemented :

I sent replies on how to resolve the problem as well as a video for detailed information

Accepted Answer

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Posted 12/21/2019

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My 2005 Acura RL heater blows cold air on the driver's side and hot air on the passenger side and the back - both sides are set to hot. The self...

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