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Snoozn2
Dodge Dakota
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7/24/2003
14:52:05
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 Subject: Frozen vents
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Message:
Hey all...I've got a '00 3.9 Dak (RWD,RC,5spd), and every time I use the AC for more than 15-20 minutes (a little longer if on "max AC"), the vents seem to freeze inside and next to no air blows through. This happens whether or not the temp dial is set to full cold. I've also noticed that after driving with the AC on, I end up with a massive puddle of water on the pavement under the accumulator. BTW, although it has only 32k miles, I'm not sure the R134 was ever changed. Do I just need a recharge, or is my accumulator on its way out?
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J and J Auto
Dodge Dakota
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7/25/2003
02:41:05
|  RE: Frozen vents
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Message:
Take it to a certified A/C man it sounds like
a condition that happens when the refrigerant
is low.
We have all the equip to work on A/C but no one
in the shop is certified or wants to be. in
wisconsin you can not even buy refriderant unless
you are certified but I can drive into Michigan
and buy it over the counter.
Larry
J&J Auto
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Jeremy
Dodge Dakota
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7/26/2003
03:15:57
| RE: Frozen vents
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Message:
You can actually get it here in Indiana at Walmart,just single refill cans for a few bucks a piece or a whole conversion kit for for like $40
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scott
Dodge Dakota
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7/27/2003
15:18:42
| RE: Frozen vents
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Message:
first off, the 00 would be stock with r134a {every car is since 1995, most in 1994)
Larry, you really cant buy R134a over the counter?mannnn thats gotta suck!Ive heard the EPA is trying to ban OTC sales but didnt know any state has already done so.
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Jon
Dodge Dakota
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7/28/2003
08:55:29
| RE: Frozen vents
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Message:
Sounds like the evaporator is icing over. It mostly happens when the humidity outside is high. Some manufacturers can make changes to the system to keep the evap core temperature above 32 degrees, check with your local dealer to see if anything can be done. The r134 never needs to be cahnged unless it leaks out. Water on the ground is normal.
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Paul
Dodge Dakota
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7/30/2003
10:24:15
| RE: Frozen vents
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Message:
It sounds like it could be one of two things:
the limit switch may have gone bad...That's what cuts the compressor off when the pressure drops low enough (the temp and pressure are pretty closely related) and it's freezing over the evaporator coil.
Or it's low on refridgerant, but usually, the limit switch will still kick the compressor off.
It won't matter what the temp set to cold or hot because the heater core comes after the evap.
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Jon
Dodge Dakota
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7/30/2003
19:11:25
| RE: Frozen vents
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Message:
He said that air stops blowing out the vents, even if it was low on refrigerent air would still blow through, it would just be warm. I'd say the temp (limit) switch is the problem. I know Toyota has a service bulliten to install a new evap temp sensor to keep the evap from icing over and stopping the air from blowing out the vents.
-Jon
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Paul
Dodge Dakota
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7/30/2003
20:36:26
| RE: Frozen vents
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Message:
it's possible for it to freeze over when it's low on gas, but yeah, my money is still on the limit (temp) switch. It's really easy to get too, but i'm pretty sure you have to evacuate the gas to change it out.
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