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Old 07-31-2018, 02:27 AM   #1
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Fan motor possessed or just slowly dying?....

So as we're experiencing a recent heat-wave, I am having to actually use my cars A/C now and again, though as little as I can as running it on this car really seems to aggravate it (brutally slow throttle tip in and annoying/imagined power sap)

So I've had the car all of 2 months and still trying to source the poor mpg's (will be tackling the code that came up - P0456 - soon) Up until I've started dipping into the A/C, the fan motor has blown as it should on all 4 speeds with no issue or quirks. Then it got weird! It seems it would run for anywhere from 2 to 20+ minutes, then all of a sudden fizzle out (by that I mean it wasn't a sudden/pronounced shut off, but a slow dying to nothing blowing out) It would do it on either just the fan (cool air or heat) or operating the A/C - made no diff!

It didn't do it consistently, at first. Some days the A/C would operate on full for as long as I needed, but lately it's gotten to the point of working (properly) on all speeds for a few minutes, then shutting down to nothing. But if I then re-started it a few minutes later, it'd come back on...and again, die! It's like it gets over-heated and needs a breather to catch it's breath to blow any air!?

Then I made a weird revelation today where if I operate it on only fan speed 2 (out of 4 possible) it'll keep going with no problem, but obviously not cooling as well as I'd like, what with it pushing 30C (90F)

So is this a slowly dying fan motor? Or maybe a resistor on its way out? I know very little about how these things operate but seeing as how this car has been around near 20 years, I'm sure I'm not alone experiencing this glitch.

Ford, of course, figures they can diagnose it in 1-1.5 hours at $150 per....I'd really like to hear some input here before I commit =P

Again, thanx much in advance for any troubleshooting help/advice! I still love this thing!


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Old 08-01-2018, 01:12 AM   #2
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You have an EVAP issue.
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Old 08-01-2018, 01:39 AM   #3
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Originally Posted by pasta View Post
You have an EVAP issue.
Well a mechanic friend (having heard about the code) mentioned that odds are the gas cap is defective, even though no cel is on. When unscrewing the cap there is no normal release of air or 'whoosh' as is the norm when doing so, indicating the cap is no longer good, although after doing some research it seems ambient temp. and even how full the tank is can affect that? Either way, it's a cheap fix if the cap is throwing that code. Pardon my ignorance but is there any way the evap issue (p0456) can in any way be tied in to a fan blower problem?!

I should add, I have been closely following its operation and have some interesting finds. On full force (level 4 on the fan) it'll blow either vent air or full A/C (whatever I chose) for a good 30-35 seconds, and then fades out slowly to nothing (on any of the 4 levels) On level 3, it'll go a good 70 seconds and do the same. On level 2, it seems to go on a fair bit longer...maybe 4 minutes? - before it dies off. But in every case, after I shut it down (to level zero/off) it will work again for the above time allotments if I give it a few minutes 'rest' to catch its breath/regroup? So it is blowing, and effective, but the harder it's pushing, the faster it burns out and needs to be 'reset' Does that make sense?

From the good ol' you tube searches/and ff.com searches the consensus was a failing resistor, but in those cases the fan just wouldn't blow, or only do so on high/level 4. Mine works on all levels - for a while, then conks out! So I'm at a loss?
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Old 08-01-2018, 02:56 AM   #4
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Quote:
Originally Posted by todzilla View Post
Well a mechanic friend (having heard about the code) mentioned that odds are the gas cap is defective, even though no cel is on. When unscrewing the cap there is no normal release of air or 'whoosh' as is the norm when doing so, indicating the cap is no longer good, although after doing some research it seems ambient temp. and even how full the tank is can affect that? Either way, it's a cheap fix if the cap is throwing that code. Pardon my ignorance but is there any way the evap issue (p0456) can in any way be tied in to a fan blower problem?!

I should add, I have been closely following its operation and have some interesting finds. On full force (level 4 on the fan) it'll blow either vent air or full A/C (whatever I chose) for a good 30-35 seconds, and then fades out slowly to nothing (on any of the 4 levels) On level 3, it'll go a good 70 seconds and do the same. On level 2, it seems to go on a fair bit longer...maybe 4 minutes? - before it dies off. But in every case, after I shut it down (to level zero/off) it will work again for the above time allotments if I give it a few minutes 'rest' to catch its breath/regroup? So it is blowing, and effective, but the harder it's pushing, the faster it burns out and needs to be 'reset' Does that make sense?

From the good ol' you tube searches/and ff.com searches the consensus was a failing resistor, but in those cases the fan just wouldn't blow, or only do so on high/level 4. Mine works on all levels - for a while, then conks out! So I'm at a loss?
i would try turning the fan on first without the A/C on and see if it runs a while that way , if its the same would look at the fan switch in the fan controls and/or fan resistor and Fan itself. IF its only with the A/C on you have this issue i would look at the A/C system.
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Old 08-01-2018, 03:24 AM   #5
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Quote:
Originally Posted by huntingdmouse View Post
i would try turning the fan on first without the A/C on and see if it runs a while that way , if its the same would look at the fan switch in the fan controls and/or fan resistor and Fan itself. IF its only with the A/C on you have this issue i would look at the A/C system.
Sorry I was afraid that would be hard to get across when writing it.

I did run the blower on both air only (til it died) then then same test using A/C, which died in the same time frame. Basically in either case (whether just vent air or A/C air) the time it took for the blower to just slowly shut down was the same. I think you could also hear a mild moaning noise as it slowly shut off...like an odd wheezing. I'm going to listen under the hood running the same battery of tests tomorrow to see if the source is obvious. I'm certain it's not an A/C problem - and to be honest, a fan issue, as it will work - it just shuts off completely (and I then turn the dial/fan to zero) til it has a chance to 'regroup' and go at it again.....to reiterate, the higher the blower/fan level, the faster it fizzles out.

Hope that helped clarify?....and I will look into the resistor in behind the glovebox when i'm able as this seems cheap and (relatively) easy to replace?
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Old 08-01-2018, 03:27 AM   #6
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Quote:
Originally Posted by todzilla View Post
Sorry I was afraid that would be hard to get across when writing it.

I did run the blower on both air only (til it died) then then same test using A/C, which died in the same time frame. Basically in either case (whether just vent air or A/C air) the time it took for the blower to just slowly shut down was the same. I think you could also hear a mild moaning noise as it slowly shut off...like an odd wheezing. I'm going to listen under the hood running the same battery of tests tomorrow to see if the source is obvious. I'm certain it's not an A/C problem - and to be honest, a fan issue, as it will work - it just shuts off completely (and I then turn the dial/fan to zero) til it has a chance to 'regroup' and go at it again.....to reiterate, the higher the blower/fan level, the faster it fizzles out.

Hope that helped clarify?....and I will look into the resistor in behind the glovebox when i'm able as this seems cheap and (relatively) easy to replace?
id look at the fan switch and resistor and fan. id take a volt meter to the back of the fan connector and if you still have 12v there when the fan dies, you got a bad fan, if not trace backwards to switch and resistor til you find where the problem is.
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Old 08-02-2018, 12:59 AM   #7
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Quote:
Originally Posted by huntingdmouse View Post
id look at the fan switch and resistor and fan. id take a volt meter to the back of the fan connector and if you still have 12v there when the fan dies, you got a bad fan, if not trace backwards to switch and resistor til you find where the problem is.
Thank you! I will def. look into this tomorrow. I'm hoping it's the easier of the options as I've heard a fan replacement is a 4+ hour job?! It's still operating on level 2 ok for a while, but will still eventually conk out until turned off and 'reset'. But at least I get a few minutes of cold air as this heat wave is pretty brutal with nothing but windows open! =P
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