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Discussion Starter #1
I earlier posted a thread about the AC fan running slow at certain times, and the suggestion that there might be a voltage issue when everything is maxxed out made sense.

However, yesterday it happened again and I realized it wasn't a fan slowdown but something seemed to be blocking the air. Almost no cold air ws coming out. Yet when I put the fan speed on its highest setting, I could hear the fan roaring away with only the tiniest increase in air flow. I switched to recirculate -- no change. I turned the AC off and still no significant air coming out, though the fan was working full strength.

It has been extremely humid here. Is it possible that somehow the AC coil (which delivers "cold" to the system) GOT FROZEN FROM ALL THE HUMIDITY AND WAS BLOCKING AIR FLOW???

Is there a drain that might be plugged or something (car only 2 months old, though).

I'm sure it will be fine next time I drive the car. And next time the phenomenon occurs (if it does), I'm going to try turning the AC off and running the heater.

ANY SUGGESTIONS.

Is there a Ford person looking over this...maybe it's an issue I should take to the dealer, though you can imagine trying to convince a dealer about some issue if it's not at that exact time taking place, which is probably won't be.
 

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Discussion Starter #3
One word. Warranty.

Chances are the vents aren't actuating properly. Bring it in. Get it fixed for free. Relax.
Thans, but remember -- the vents work and then they don't and then they do. The "don'ts" come at very hot times only, and not often. And if you've ever dealt with a dealer on a "little thing" like this, they'll either tell you it's not happening or it's supposed to be happening.

Of course warranty is there, but as a last resort. I've had better luck with dealers when I could tell them want was wrong and what needed to be looked at. I think a lot of the time for something like this, if it's not actually happening when you bring it in, they just park your car in the back for a while, then call you and tell you they couldn't find anything. Yes, I'm a bit cynical.

Thus my question -- anybody else seen this or have any ideas about this?

???
 

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I've seen this on a few different vehicles. This may not be the only issue at hand, but the symptoms are similar to a frozen evaporator. Usually turning off the A/C for a few minutes, will restore the airflow. Probably best to have the dealer A/C expert take a look at it.
 

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Right. a performance test provides valuable clues as to possible troubles.
It may be recommended that in cases of high humidity it is best to run in the Recirc. mode.
 

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Discussion Starter #6
Right. a performance test provides valuable clues as to possible troubles.
It may be recommended that in cases of high humidity it is best to run in the Recirc. mode.
Very good idea to run in recirc mode. That air is already dehumidified.
 

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Discussion Starter #7
I've seen this on a few different vehicles. This may not be the only issue at hand, but the symptoms are similar to a frozen evaporator. Usually turning off the A/C for a few minutes, will restore the airflow. Probably best to have the dealer A/C expert take a look at it.
I guess I should have them look at it. They're not terribly convenient, but it's a big dealership and I'm sure they do have an A/C specialists. I'll have to give them a call.
 

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I won't quote your post because I didn't have an air flow problem. But twice now my A/C hasn't been cold at all until like 20 miles into a trip. I know it's not necessary, but every time I drive the car, I let it idle until I see one bar on the temp meter. After that I always drive very slowly and stay out of boost until the temp is at 4 bars. It's an 80's turbo owner habit that will never die. Twice now the A/C has blown hot air well after the car is warmed up and at 4 bars on the temp gauge. My trip to work is the same 20 miles max and twice the A/C was warm 90% of this trip. NO air flow problem, but for sure the A/C should be blowing cold air. It didn't. Here in the south it's hot/humid as hell so I had to roll down all 4 windows to keep somewhat cool. It's only done this twice, but for sure something is up with the A/C. Problem is, if I take it in to the dealer, I'm sure it will work just fine. Not sure what to do. Unless everyone's car takes 20 miles to get the A/C to become cold, my car has some sort of A/C issue. Not major, but for sure a problem. Related to your problem?? I don't know.
PS. Of course it's auto temp so the A/C comes on immediately when you engage it if thermostat is turned down. In my case down to 68 degrees. I turned it off and on during the trip and still warm.
 

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To me that indicates a coolant pressure problem.
Of course, If the ambient temperature in the cabin is below the set temperature, no cooling.
Other wise it is time to visit the dealer.
Engine temperature is irrelevant to the problem.
 

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Even if you can't replicate the problem you will have a record of the problem. If it persists after your warranty has expired you might still have it covered as preexisting. You will eventually have a failure.
 

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I would bet money that you're having a blend door actuator issue. Regardless of coolant flow through the heater core, or refrigerant being pumped through your evaporator, you're experiencing a lack of air movement within the heater suitcase. Often times, an actuator will hang between modes and impede airflow. The dealer scan tool will be able to independently activate the blend door motors separately and be able to find any issues.
 

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I earlier posted a thread about the AC fan running slow at certain times, and the suggestion that there might be a voltage issue when everything is maxxed out made sense.

However, yesterday it happened again and I realized it wasn't a fan slowdown but something seemed to be blocking the air. Almost no cold air ws coming out. Yet when I put the fan speed on its highest setting, I could hear the fan roaring away with only the tiniest increase in air flow. I switched to recirculate -- no change. I turned the AC off and still no significant air coming out, though the fan was working full strength.

It has been extremely humid here. Is it possible that somehow the AC coil (which delivers "cold" to the system) GOT FROZEN FROM ALL THE HUMIDITY AND WAS BLOCKING AIR FLOW???

Is there a drain that might be plugged or something (car only 2 months old, though).

I'm sure it will be fine next time I drive the car. And next time the phenomenon occurs (if it does), I'm going to try turning the AC off and running the heater.

ANY SUGGESTIONS.

Is there a Ford person looking over this...maybe it's an issue I should take to the dealer, though you can imagine trying to convince a dealer about some issue if it's not at that exact time taking place, which is probably won't be.
Take it in to be looked at, it's still under warranty!

New car 2015 1.0L:


Old car 2011 1.6L:
 

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Discussion Starter #13
I've seen this on a few different vehicles. This may not be the only issue at hand, but the symptoms are similar to a frozen evaporator. Usually turning off the A/C for a few minutes, will restore the airflow. Probably best to have the dealer A/C expert take a look at it.
This is absolutely the problem. Now in the 2nd summer, it's happened again only when I run the AC in MAX mode (recirculating the air), it doesn't happen.
 

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I realize this is a HUGE necro-bump here, but I'm curious if this was ever confirmed and how it was addressed? I had a couple of occurrences like this last year with my car but didn't think too much of it. Today, I was driving and it was quite hot so I had the AC running. When I started my journey, the car was blowing well (and COLD) the longer I drove the less air was being pushed. I didn't change temp or anything of the sort, simply kept turning the fan level up. Eventually, I got bordering on NO (and I mean it, nearly nothing) airflow even on fan setting 4. I turned off the fan for about 10 minutes (and put the windows down), then turned it back on and MAGIC - airflow.

Is this sort of what happened with you, and if so, was it addressed?

I'm kicking myself now because my car has 105k km on it (but this did occur a couple of times prior) so I'm out of warranty.
 

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Sounds like an evaporator coil freeze up due to low refrigerant. Look for frost on any A/C hose or fitting under the hood after it stops blowing cold air with the fan running. R134A recharge kits are available at any auto parts store. Happened to my 2012 twice.
 

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Sorry, after I replied I noticed you're from Canada. I had a freeze up in Quebec and was only able to find something called 12A at a car parts store, 134A wasn't available for DIY purchase there. I'm not sure about the rest of Canada. I couldn't determine if 12A was acceptable to put into a 134A system, so I waited until I was back in the US and bought 134A there.
 

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My '85 Tempo, yes I'm old, had the same problem. The freon needs to turn off so the condensation doesn't freeze and clog up the evaporator coil. It needed a new switch. You don't want that part getting below 32 degrees for very long.

It could be any of the other issues people mentioned too in the above posts. If it's under warrantee, you golden.


Please report back when you it it fixed and let us know what it was.
 

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I'm having a similar, if not same, problem. I can be driving along with A/C on either MAX or normal, and the cold air coming out of the vents gradually decreases until it just about stops regardless of what fan setting I have it at. The only way to fix this is to shut off the A/C with fan on high until the airflow is restored and then I can turn on the A/C again like normal. I have taken it to the dealer as I am still under warranty, but they could not replicate the problem so they sent me on my way with nothing done. But all they seemed to do is check for codes and TSB's! So of course it worked for them, even on the road test. So dealer was no help.

My theory is that the compressor cycling switch is defective , causing the compressor to run constantly and thus causing the evaporator or condenser to freeze up. A properly working compressor will cycle on and off as needed so no other component freezes up or over exerts itself. So I put my car on the lift at work with the air con running for at least 15 minutes and sure enough, the compressor was running constantly even though the doors and windows were shut, so in theory, the cabin air temperature should have went down enough to trigger the compressor to cycle off. So I tried looking for the A/C cycling switch and I found something on the bottom of the compressor that looked like a switch of some kind, but I have no clear idea if that was indeed the cycling switch. Does our car even have one? If so, where is it located? I don't know what else to do or what else could be causing this issue, but it's in the 90s here currently, so I need my A/C working as it should , especially while my car is under the bumper to bumper 36,000 mile warranty, which I'm already at 34,000 miles. I really don't want to be stuck with a huge bill for A/C components or entire system when my warranty runs out.
 

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On another forum, someone suggested that the system could be overcharged, and apparently our cars are overcharged at the factory. So the solution is to let some of the refrigerant out via the low pressure port (ideally you should use a pressure checker/tester so you don't let out too much freon or too little) until the system is running with the correct amount of R134a in it. I have used a pick to depress the little valve button on the port 3 times now on different days, and I am still having this issue, so I don't know what to think.
 

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Took my car to the dealer again and they actually found something wrong with it finally. Turns out I need a new A/C compressor, so they ordered the part and I hope to have it working again this week when the part comes in.
 
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