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Weird Air conditioning happenings


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16 replies to this topic

#1 OFFLINE   JeanLucBlue

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Posted 23 August 2015 - 08:28 PM

All,

 

I was driving on the freeway the other day and the outside temperature was between 85-90 degrees. I was driving happily along nice and cool when I thought the cabin was getting kinda of hot. I looked around a found out that the fan was working at high speed, you could hear it in the dash, with just a little cool air blowing out the vents. Everything looked fine on the dash.

 

I started to change temp and such but nothing happen. So, I decided to change out of re-circulating air to outside vent air and within 2 seconds, the air conditioner was back to working normal with lots of air blowing out and cold (even seemed colder too).  I waited a few more minutes and decided to go back to re-circulating air and it worked fine for about 5 minutes then the problem happened all over again. Redid the re-circ air to outside air and back and it was fine. It was like the 'flap' to the fan and re-circ air got stuck? 

 

It did not do it again the rest of the trip. Has anyone had this happen before? A friend of mine said he was travelling up the 15 fwy here towards Clairmont, CA and the temp was 100 degrees and he said he experienced the same thing only he did not do what I did. He suffered until he could turn off the car. He drives a Hybrid only model.

 

I never had this happen before and so I am not going to take it into the shop for this one instance. Unless I hear something different from you guys. Is there something in software or that says the cars running to hot for air conditioning and so shuts it down or?

 

Thanks!









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#2 OFFLINE   rbort

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Posted 23 August 2015 - 08:46 PM

Sounds like the AC coils froze and the air flow was cut down due to blockage.  Outside air is hotter coming in over the coils and probably thawed it out.  Next time if this happens try turning off recirculate and leaving it off letting the car take from the hotter air outside.  Its more work for the AC, but then again a frozen AC is no AC so might be the work around.  

 

You can also try turning the temp up higher so the compressor doesn't work so hard and freeze up the evaporator.  But be careful not to turn it up too much and cause electric heat to kick in and warm things back up.  You'll see a jump in the climate meter if this happens.

 

-=>Raja.



#3 OFFLINE   rbort

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Posted 23 August 2015 - 08:48 PM

Oh yeah, by the way, I'm coming soon to San Diego, will be there in September and I plan to attend the EV car week event in San Diego on the 19th I believe.  Maybe you or other Cmax drivers from the area here can stop in to meet and greet!

 

-=>Raja.



#4 OFFLINE   Kermit

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Posted 24 August 2015 - 05:09 AM

Raja, will you be driving there?



#5 OFFLINE   rbort

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Posted 24 August 2015 - 06:00 AM

Oh no too far Kermit, I'm flying out.  Where are you located?

 

I am driving out to New Brunswick, Canada later this week though!  I was making my plans last night where to get gas and where to stop and charge up on the way -- looks like Bangor, ME is a good spot for that with gas at $2.23 a gallon  :smile2:

 

-=>Raja.



#6 OFFLINE   stevedebi

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Posted 24 August 2015 - 08:22 AM

All,

 

I was driving on the freeway the other day and the outside temperature was between 85-90 degrees. I was driving happily along nice and cool when I thought the cabin was getting kinda of hot. I looked around a found out that the fan was working at high speed, you could hear it in the dash, with just a little cool air blowing out the vents. Everything looked fine on the dash.

 

I started to change temp and such but nothing happen. So, I decided to change out of re-circulating air to outside vent air and within 2 seconds, the air conditioner was back to working normal with lots of air blowing out and cold (even seemed colder too).  I waited a few more minutes and decided to go back to re-circulating air and it worked fine for about 5 minutes then the problem happened all over again. Redid the re-circ air to outside air and back and it was fine. It was like the 'flap' to the fan and re-circ air got stuck? 

 

It did not do it again the rest of the trip. Has anyone had this happen before? A friend of mine said he was travelling up the 15 fwy here towards Clairmont, CA and the temp was 100 degrees and he said he experienced the same thing only he did not do what I did. He suffered until he could turn off the car. He drives a Hybrid only model.

 

I never had this happen before and so I am not going to take it into the shop for this one instance. Unless I hear something different from you guys. Is there something in software or that says the cars running to hot for air conditioning and so shuts it down or?

 

Thanks!

I had this happen on a recent desert trip. You just need to turn off the compressor and let it unfreeze. I have seen a TSB on this issue, but I don't know if it applies (a problem with the sensor that keeps the compressor from freezing).



#7 OFFLINE   Smiling Jack

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Posted 24 August 2015 - 11:43 AM

A few more thoughts that might help:

 

Icing up can also be caused by insufficient air flow; so,

 

1.  Check your (cabin) air filter and replace if clogged or even dirty.

 

2.  Make sure that all of the discharge vents in the cabin are fully open - and discharging plenty of air.

 

2. As an ongiing measure, generally never set the blower (fan) speed to lower than automatic in very  humid conditions, and if you still get icing then make it a habit to set the blower (fan) speed to a higher setting, and if that makes the cabin too cold for comfort then set a slightly higher temperature.



#8 OFFLINE   JeanLucBlue

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Posted 24 August 2015 - 05:20 PM

Thank you everyone!!!!



#9 OFFLINE   FordService

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Posted 25 August 2015 - 09:29 AM

...I never had this happen before and so I am not going to take it into the shop for this one instance. Unless I hear something different from you guys. Is there something in software or that says the cars running to hot for air conditioning and so shuts it down or?

 

Thanks!

 

If you do decide to head to your dealer, please let me know. I'll be happy to check out some options.

 

Meagan



#10 OFFLINE   komondor

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Posted 25 August 2015 - 06:37 PM

I have had  mine do that it seems the doors ( for defrost, vent, floor) close for some reason I can usually get it to fx itself by shutting off the engine and turning it back on .



#11 OFFLINE   balahmay

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Posted 18 May 2017 - 01:10 PM

Just had this happen while on a trip. 85 degrees and humid. Air flow went down to almost nothing so turned it off. Stopped for a pit stop. Turned car off. 10 minutes later took off and it works perfectly. ???

#12 OFFLINE   sporkinum

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Posted 19 May 2017 - 07:59 AM

Just had this happen while on a trip. 85 degrees and humid. Air flow went down to almost nothing so turned it off. Stopped for a pit stop. Turned car off. 10 minutes later took off and it works perfectly. ???

That definitely sound like frozen coils. I have that problem with the AC in the upstairs of my house. Only have central in the upstairs, and if you take a hot shower and leave the door to the bathroom open, the coils will ice up. Have to turn off the ac for a few hours and let the ice melt.



#13 OFFLINE   OhioEnergi1

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Posted 07 July 2018 - 12:05 PM

Just happened to me also. Fixed it by pulling over, turning the car off and letting the system shut down all the way (opened door to speed this), and waiting a couple of minutes, then turned it on and all was fine. If icing, it would have had to melt awfully fast.

#14 OFFLINE   komondor

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Posted 07 July 2018 - 03:17 PM

I have had it happen more often to me the solution is to turn it on defrost then back to vent so it is not freezing just the door closing on it's own it seems.

I can even do vent and defrost then vent and have it work.



#15 OFFLINE   plus 3 golfer

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Posted 07 July 2018 - 09:31 PM

Ice build up on the evaporator core and subsequent restriction of air flow / loss of cooling is generally caused by a faulty evaporator temperature sensor.  When the air flow temperature through the evaporator core reaches around 35F (IIRC, it's in the service manual), the compressor is shut off so ice does not form on core.  There's a small pop-off cover below the driver's right knee on the center console near the accelerator pedal with the sensor inside.  It's  a $10 - 15 part. BE8Z19C734A should be the part number.

 

 


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#16 OFFLINE   cr08

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Posted 07 July 2018 - 09:37 PM

What plus 3 golfer mentioned is correct. Seems to be a common thing unfortunately across models. In addition to getting the updated part, there is also an immediate workaround that can be done anywhere with zero tools. This video is what made me aware of it and explains the situation as well as the workaround.

 

 

The 2013-2014 Escape's are practically identical in most places concerning the dash and HVAC systems to our cars so this does apply.


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#17 OFFLINE   Levi Smith

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Posted 08 July 2018 - 05:48 AM

My car has "spit" at me a few times in the past few weeks and then last week on a nice 95F day with the climate control set to 65F after like half an hour I was thinking "this air doesn't feel all that cold..."  And I recall at least one of the C-Max's I was looking at having a repair history of complaints regarding the AC...  I wondered if it might be freezing...  I simply left the auto as it was, turned the AC itself off and opened windows.  Within about 30 seconds the air coming out of the vents started cooling off and I got some more spitting at me.  After maybe 5-10 minutes I closed up the windows and turned the AC back on and it seemed to be as functional as ever again.  I replaced the cabin filter since then.  Man this stuff is yet more mickey mouse stuff compared to Toyota.  Never had these problems and changing a cabin filter was a 1 minute job where you just sit in the passenger seat, the glove box pops out and you pop in the filter.  Easy peasy.  Gotta love the Ford version where you're forced upside down in the footwell again trying to deal with a cover you can't see half of and then you have to fold the filter in half in awkward ways to get it in or out since there's not actually room...


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