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Hi All,

This is on a 2015 Focus SE. If I have been running the A/C for awhile then turn the A/C off but leave the fan running I get a bad musty smell from it. Then turning the A/C back on the smell gets worse.

I may get some of the spray that you shoot down the air intake while the A/C is on full blast, but first I want to make sure the drain is clear and the smell isn't just from water backing up into the evap chamber.

I looked up some YT videos and a lot of the newer fords have the drain right on the firewall under where the coolant lines run in behind the engine. I looked but could not locate anything like that on my Focus.

Thanks,

Jeremy
 

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2012 here. I always blast the vents after running the AC to clear out any moisture. So far I've not gotten any noticeable smell from the vents on the next start up. I've done this with every car I've owned since my 94 Escort (they were notorious for the AC vent smell) and never had any issues.
 

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I would almost say this is "normal" on our mk3 focus cars. Doubt anything is clogged up. Spray the outside intake vents with some lysol and it'lll kill the smell for awhile.
 

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Hi All,

This is on a 2015 Focus SE. If I have been running the A/C for awhile then turn the A/C off but leave the fan running I get a bad musty smell from it. Then turning the A/C back on the smell gets worse.

I may get some of the spray that you shoot down the air intake while the A/C is on full blast, but first I want to make sure the drain is clear and the smell isn't just from water backing up into the evap chamber.

I looked up some YT videos and a lot of the newer fords have the drain right on the firewall under where the coolant lines run in behind the engine. I looked but could not locate anything like that on my Focus.

Thanks,

Jeremy
I am also getting a smell like this, I just purchased a 2016 and have less then 1000 miles on it...
 

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Livens - got the drain location backwards for the Focus.

OLDER focus models had the drain in the firewall, current models it drains out of the rt. side of the HVAC unit in the console between driver & passenger knees.

There are threads in here with pictures showing the console side/carpeting removed or folded back for a better view, hose elbow plugs into the unit then goes down through the floor to exit under the middle of the car.
 

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Our C-Max does this. It smells like old gym socks for about 2 mins after you turn the AC on.

Sent from my SPH-L720 using Tapatalk
 

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Discussion Starter #7
Livens - got the drain location backwards for the Focus.

OLDER focus models had the drain in the firewall, current models it drains out of the rt. side of the HVAC unit in the console between driver & passenger knees.

There are threads in here with pictures showing the console side/carpeting removed or folded back for a better view, hose elbow plugs into the unit then goes down through the floor to exit under the middle of the car.
Thanks Sailor, that helps.

Bit of an update. I found the drain exit under the car, and it is draining fine. I also did a lot of reading about this issue, and my problem may have been coming from my use of the Recirculate button.

I have always turned on recirculate, I just keep in on al the time. Apparently this produces an even more wet environment in the evap chamber, and things can get stagnant pretty quick.

So this week I have been using the A/C without the recirculate. Also I have started turning the A/C off with the fan on high for a minute before shutting the car off. Lots of advice on here and elsewhere on doing this to dry off the coil a little bit before shutting down.

The result: No more smell of any kind :).
 

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Old Phart
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Good to hear you found a system that works better for you.

Recirc doesn't help anyways on shorter trips, it can help on longer ones in very hot weather once the interior source temp. gets below the outside one. Recirculating heated air from inside slows overall cooling when first starting out.

Humidity varies depending on circumstances, often less inside when introducing outside air that was dehumidified by the A/C. The more people inside the more humidity to remove, think of cold weather when you get in the car and the windows fog. A similar one is seeing a car loaded with passengers and all windows are fogged in the winter. Not enough air flow/heat to get the humidity level down inside from all the breathing. Crack a window to let more air exhaust, increasing dehumidified air intake through the HVAC system.
 

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Foci-philes:

Putting the temperature up to full hot for a few minutes once in a while (in the summer) will help to dry out the moisture and keep things from stinking.

Nobody wants to have the heater on when it's 100 F out but it does help to dry out the A/C system and reduce the frequency of smelly vent gas. Works on all vehicles, lol.

HTH,

Chris
 

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Livens - got the drain location backwards for the Focus.

OLDER focus models had the drain in the firewall, current models it drains out of the rt. side of the HVAC unit in the console between driver & passenger knees.

There are threads in here with pictures showing the console side/carpeting removed or folded back for a better view, hose elbow plugs into the unit then goes down through the floor to exit under the middle of the car.
Hi there,

I was wondering if you could please advise as I noticed a liquid under my car (Ford Focus Hatchback 2011) today and am worries that I May have a leak.

The liquid is odourless and opaque and I was able to take a picture (see below). The liquid is coming out of the goldish "funnel"? Is this normal? I have heard that I may have an AC pipe leak. Any Insight would be much appreciated.

Thanks!

306962
 

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Those two drips look like they're right underneath your exhaust. Are you sure they aren't water droplets? If they are water, my first suspicion would be from a leaky exhaust pipe.
 

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Those two drips look like they're right underneath your exhaust. Are you sure they aren't water droplets? If they are water, my first suspicion would be from a leaky exhaust pipe.
I would however agree that it Is probably water, therefore wondering if it could be the AC drain
 

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Hi. The wheels on the picture are the front wheels quite a way from the exhaust.
Is your engine in the front of the car?

How do you think the exhaust from the engine (front) gets to the tailpipe (back)?

Water condensation drips from pinholes in the exhaust system.

Get under your car and trace where it’s coming from. You’ve been given two possible options.
 

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I'm with beretta96 on this. Looks like a possible exhaust leak. When I had the cat-back exhaust welded together on my car the shop noticed a pinhole leak on the factory exh manifold weld right where the pipe meets the flange. I was surprised to see it on a 4 yr old car with 18k on it, but there it was. Pretty much in the same location as where it is in your pic. They filled it in no problem.
Easy enough to figure. If you're seeing the water shortly after you turn the car on from a cold start, it's likely the exhaust. If you're seeing it drip after a long drive...which id be surprised by...then ya maybe AC or some other thing leaking.
 
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