Byrd250

I have a 04 accord when the cars a/c is on the passenger side air is blowing cold air but the driver side is not anyone have a clue of why this is?

Lost Again

I'd check for HVAC codes first. Can't hurt to have the system pressures tested as well as that can cause uneven cooling.

johnmackin

when was it charged last?

Byrd250

I charged it over the summer seem to work better but not a big difference. I wouldn't think a leak if the passenger side blows cold.

wheelie man

no dual climate control then I don't think, duct connector tube may have come off? Is it blowing the same amount of air on both sides?

Byrd250

It has dual climate control, it blows air but not cold like the passenger side. Not sure if there is a valve stuck for the a/c an not switching to cold.

fcm

The blendor for the drivers side is stuck.

You are correct A/C refrigerant pressure, [charge] effects both sides equally, there is only one evaporator with airflow directed to the drivers and pass. sides using blendors.

Will find a heater box diagram for you as soon as the site is up.94

fcm

Need trim level.94

wheelie man

good call fcm

Lost Again

You may be an "Old Fart" but I respectfully disagree with your comment that a low charge will not cause uneven cooling. It was never stated if there was a 20 degree difference between the two sides or a 5 degree difference.

The OP already stated that they had to add 134a, so this tells you something.

The first thing you would want to do is TEST for codes.....why guess at something?

EDIT: "Blend Door"......or better yet, "Air Mix Motor" on this gen.

kingteg

iTrader: (1)

Agreed with LostAgain* Step 1; check pressures. If refrigerant is low, that will most certainly cause uneven coolness in either side vent and the pass side will ALWAYS blow cooler because it is closest to the evap. Proceed with leak checking and/or causes of low pressure. Step 2 should you find pressures OK; check for hvac dtc's in the self diag function. If you find any, proceed with troubleshooting. If not, test the air mix control motor-if faulty(stuck or not moving in desired posistion) replace. (misc things to check- heater valve, cables, ect. Recomend consulting the service manual and etm or equivelant)

fcm

I understand, and if the OP had said the drivers side was not blowing as cold or the pass. side was blowing colder, my first suggestion would have been to check the refrigerant charge.

However the OP said, "the passenger side air is blowing cold air but the driver side is not" now the OP may need to clarify exactly what the diff. is in temp. from pass. drivers side.

I also agree that the pass. will always blow colder, but it does so even with a full refrigerant charge.

As for just having it charged in the summer, it tells me it was due for a service, not surprising on an 04.

We, http://www.airwolfeautoair.com/ deal with cold air out of one zone and not the other all the time and the number one problem, by far, is a blendor/air-mix problem, so it is the first thing I would look at.

With that said, you may be correct, but without more info from the OP, we are just guessing. 94

kingteg

iTrader: (1)

Gota love diag. Following the steps provided will yield results

Byrd250

thanks FCM and kingteg for the hepful hints to help clear up any miss understanding i did service the car over the summer the drivers side blew an bit colder after serivcing but not a noticable difference. At the present time on a hot day the passenger side will be much colder than the drivers. If the air mix motor is bad would that through a code an turn on the check engine light. Can it be checked at a local auto parts store with there scanner. Thanks again for the imput

fcm

What is the trim level of your Accord? 94

Byrd250

I am not sure what trim level is? Please explain

fcm

EX, EX (V6), EXL, LX, LX (V6), 2 door or 4 door? 94

Byrd250

Lx V6 4 door

kingteg

iTrader: (1)

No a universal scanner cannot read those dtc's and the mix motor fault would not turn on your cel. If there are any hvac dtc's, they are stored in the climate control unit. Even then sometimes a faulty mix motor will pass the self diag function and not store a code. It sounds tho to me that you are low on refrigerant by the info you have provided. Check the pressures to ensure compressor and system proper operation. Then suck it down and see what you've recoverd if you can't tell entirely from your pressure readings. I don't wana go too far tho here

ExplicitJDM

There you go :p

Lost Again

OP-anytime you want to start testing, post up. From what I see, fcm and Explicit are just good at guessing....I'd be willing to bet that most of fcm's post are in the General Discussion section....do your own search.

BTW, I have the factory service manual right on my computer so if you need or want testing procedures, pics, pinouts...just let me know.....I don't need some site and have no idea what this stupid "94" is.............good luck. Seem to notice "fcm" hasn't come back with anthing in days.....flash in the pan, back in the general dis area talking about.....well you don't want to know.