2016 CX-5 Sport uneven AC cooling from vents

[txt990]

My 2016 CX-5 sport with 103k has been having unven AC cooling from thr vents. The driver side vent next to door doesn't seem to get that cold. The vent on the right of the steering wheel is cold but not very cold. The next vent is very cold..

Just started noticing this recently after the my AC blower would stop blowing air sometimes but then work again. I ordered the AC blower and have to replace it soon.

I had changed the cabin filter a few days back with a Purolator carbon activated one. What causes the uneven AC cooling from vents?

 

[RedBaron]

I had the same symptom with my CX-50. In my case it was a freon leak. Once it was fixed and recharged, all was even cooling again.

 

[Jmaz]

My 2016 CX-5 sport with 103k has been having unven AC cooling from thr vents. The driver side vent next to door doesn't seem to get that cold. The vent on the right of the steering wheel is cold but not very cold. The next vent is very cold..

Just started noticing this recently after the my AC blower would stop blowing air sometimes but then work again. I ordered the AC blower and have to replace it soon.

I had changed the cabin filter a few days back with a Purolator carbon activated one. What causes the uneven AC cooling from vents?

I'm not sure how correct this is but I remember reading somewhere that low "Freon" refrigerant can cause this. Reason was that the refrigerant entered the evaporator (under the dashboard) from the passenger side and there wasn't enough to allow for full expansion across the whole evaporator so only the first part of the evaporator (passenger side) got cooled.
I've also found that the carbon/charcoal filters really restricted airflow.

 

[RedBaron]

Beat ya!

 

[Jmaz]

Beat ya!

Yea, but I explained WHY.

 

[txt990]

I'm not sure how correct this is but I remember reading somewhere that low "Freon" refrigerant can cause this. Reason was that the refrigerant entered the evaporator (under the dashboard) from the passenger side and there wasn't enough to allow for full expansion across the whole evaporator so only the first part of the evaporator (passenger side) got cooled.
I've also found that the carbon/charcoal filters really restricted airflow.

The charcoal one definetly restrict airflow. I had tried a charcoal filter a few years back also and noticed the performance of the AC was restricted a bit. But back then I never noticed an uneven airflow from the vents. The flow was all equal.

Maybe I can get a normal cabin filter and see if there is any difference.

 

[cz5gt]

I doubt there would be much diff.Go check your refrigerant level.

 

[Whomand]

My 2016 CX-5 sport with 103k has been having unven AC cooling from thr vents. The driver side vent next to door doesn't seem to get that cold. The vent on the right of the steering wheel is cold but not very cold. The next vent is very cold..

Just started noticing this recently after the my AC blower would stop blowing air sometimes but then work again. I ordered the AC blower and have to replace it soon.

I had changed the cabin filter a few days back with a Purolator carbon activated one. What causes the uneven AC cooling from vents?
p/s: After completing a block cycle in block blast, leaving open space in the middle and along the edges improves control.

The problem might be due to airflow issues with the new air filter or a malfunctioning blower fan. After replacing the blower fan, see if the situation improves; if not, check the air intake vents.

 

[GFrosty]

My 2016 CX-5 sport with 103k has been having unven AC cooling from thr vents. The driver side vent next to door doesn't seem to get that cold. The vent on the right of the steering wheel is cold but not very cold. The next vent is very cold..

Just started noticing this recently after the my AC blower would stop blowing air sometimes but then work again. I ordered the AC blower and have to replace it soon.

Some thoughts ...

If intermittent blowing, it is likely the blower motor assembly is on the way "out". Had to replace mine a couple months ago. Had been mildly "clacking" for a several years, but then finally ceased working.

A few months ago, I also had the refrigerant level checked. Was low. Had it recharged and the pressurization/seals checked. But in the case of weak refrigerant levels I would expect the overall temperature of the cooling to be roughly uniform across all vents, just warmer than it should be.

If the blowing works well but you find that one or more of the vents doesn't blow (or doesn't blow as well), another possibility might be the "flapper" assembly that determines which vent the air gets sent to.

 

[RedBaron]

The problem might be due to airflow issues with the new air filter or a malfunctioning blower fan. After replacing the blower fan, see if the situation improves; if not, check the air intake vents.

Thanks for trying, but this would not cause the symptoms reported. Plus, replacing the blower would be a last case scenario.

If intermittent blowing, it is likely the blower motor assembly is on the way "out". Had to replace mine a couple months ago. Had been mildly "clacking" for a several years, but then finally ceased working.

See above. Not the same symptoms.

A few months ago, I also had the refrigerant level checked. Was low. Had it recharged and the pressurization/seals checked. But in the case of weak refrigerant levels I would expect the overall temperature of the cooling to be roughly uniform across all vents, just warmer than it should be.

You might expect that (I would've too), but not actually how it works given my own experience (see prev reply).

 

[GFrosty]

You might expect that (I would've too), but not actually how it works given my own experience (see prev reply).

In your own example, perhaps not.

Yet my own vehicle did indeed happen to have roughly uniform temp out of the various vents, at least until the weakness of the soon-to-fail blower resulted temp being weakly felt the farthest from the blower and more-strongly closer to the blower. Easily mistaken as a temp difference, when actually what occurred (in my own example) was weakness of airflow. But refrigerant recharge cured all of it. (Until the blower actually completely stopped working some weeks later.) Was simply pointing out an instance of what low refrigerant caused, in one vehicle.

Wasn't claiming that in the OP's vehicle that this, necessarily, was causing (even contributing to) the specific few conditions being experienced. Simply offered it up as an aid to the troubleshooting. Others' experiences with this or that part weakness or failure can have value, in that way.

 

[txt990]

In your own example, perhaps not.

Yet my own vehicle did indeed happen to have roughly uniform temp out of the various vents, at least until the weakness of the soon-to-fail blower resulted temp being weakly felt the farthest from the blower and more-strongly closer to the blower. Easily mistaken as a temp difference, when actually what occurred (in my own example) was weakness of airflow. But refrigerant recharge cured all of it. (Until the blower actually completely stopped working some weeks later.) Was simply pointing out an instance of what low refrigerant caused, in one vehicle.

Wasn't claiming that in the OP's vehicle that this, necessarily, was causing (even contributing to) the specific few conditions being experienced. Simply offered it up as an aid to the troubleshooting. Others' experiences with this or that part weakness or failure can have value, in that way.

So, my blower is also having problems as it sometimes will not blow and other time it does. I bought a blower on Amazon, and plan to replace it soon. Just need to get some time to replace it.