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Old 09-22-2015, 03:36 PM   #1
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Dash air freezing up

My dash air on my 2013 Itasca Ellipse is freezing up. I have to turn it off for a few minutes for it to thaw & then it works fine until the next time. I have been told I need to replace the dryer by one dealer & another says I may be low on freon. Not sure who to believe.
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Old 09-22-2015, 04:03 PM   #2
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Try raising the temperature and turn the system to Max or Recirc. That will recirculate the cabin air which will have a lower humidity. Humidity in the air is condensing on the coil and causing the blockage.
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Old 09-22-2015, 04:05 PM   #3
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Too much freon will cause freeze ups. If you are running max air keep blower on hi never on low. You have a freeze switch hi/lo pressure switch may not be turning off the compressor which will cause the problem. If you find out the switch is bad order new one and replace it. They just screw off and the hole in the tube is small and you will not loose that much freon.


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Old 09-22-2015, 05:00 PM   #4
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When you say freezing up do you mean it gets frozen lines to or from the compressor and is not cold or it blows snow through the vents?

Frozen line is symptom of low refrigerant. Snow is usually a blocked drain from the evaporator.
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Old 09-22-2015, 07:22 PM   #5
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Too much freon will cause freeze ups.
Never seen that happen.. have seen too little.. HOWEVER in both cases the solution is the same. Visit someone with a gauge set and find out.. Then make the proper adjustment if you need to bleed some off please have a professional do it with a machine that can recover it.
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Old 09-22-2015, 07:33 PM   #6
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Somebody did not evacuate the moisture from the system before charging with freon.
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Old 09-22-2015, 09:07 PM   #7
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If you have the evans A/C unit there is an electric thermal switch in line with the compressor power circuit that shuts down the compressor when the discharge temperature nears freezing. It may be that this switch needs to be adjusted or replaced.
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Old 09-22-2015, 09:15 PM   #8
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Never seen that happen.. have seen too little.. HOWEVER in both cases the solution is the same. Visit someone with a gauge set and find out.. Then make the proper adjustment if you need to bleed some off please have a professional do it with a machine that can recover it.

So when you run low on freon it gets colder. Mine always got warmer and had great air flow. I am a licensed air conditioning guy for 40 years but I am also a licensed aircraft mechanic for 45 plus years. All I can say is look it up.


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Old 09-23-2015, 07:00 AM   #9
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there is a point where low Freon will freeze up first then stop cool all together as it continue to lose freon. True some systems do have a low pressure switch to cycle compressor and not allow compressor to run if Freon gets to low to avoid damaging compressor as the refrigerant oil travels with the Freon to lubricate the compressor. The really fix is to have a set of gauges put on system to evaluate the true problem. If you did not have Freon put in and it worked fine then it is not to much gas! So. me systems can lose Freon but it does not take much to allow system to not operate correctly. Sometimes it can only takes a very little charge to correct freezing. If a little Freon fixes this it may be easier and cheaper to recharge then the dollar amount to fix a very small leak depending on the location of said leak. If low pressure switch is bad there is a schrader valve in the port to keep Freon from leaking out while changing LP switch. Some system use a temperature switch attached to evaporator to cycle compressor to control freezing.
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Old 09-23-2015, 07:16 AM   #10
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Old 09-23-2015, 07:40 AM   #11
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Low airflow across the evaporator coils will cause it to freeze up. Clean the coil. Make sure your fan is running at top speed and also clean it. Those squirrel cage fans will get dirty.
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Old 09-26-2015, 01:05 AM   #12
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Quote:
Originally Posted by drpeek47 View Post
My dash air on my 2013 Itasca Ellipse is freezing up. I have to turn it off for a few minutes for it to thaw & then it works fine until the next time. I have been told I need to replace the dryer by one dealer & another says I may be low on freon. Not sure who to believe.
The dryer has nothing to do with the evaporator freezing on the external fins and blocking the air flow. As already mentioned slightly low on refrigerant or low air flow will cause the external freezing. Since it's a 2013 doubt if the fins are dirty. As mentioned you should have a freeze control to prevent the freeze up.
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