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Old 09-27-2013, 06:02 PM   #1
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I been having problems with my ac. It works fine at first, but after a couple hours on a hot day a build up if ice forms on the coils and then the air can no longer flow???

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Old 09-27-2013, 06:08 PM   #2
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Location: Northern Wisconsin during summer, Snow Bird in Gulf Shores, AL
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Sounds like it needs to be recharged. How old is the AC unit?

Have a good day.


Dave & Sue Mason
2005 Cardinal 37RL
2013 F-350 Lariat Trim, 6.7L B20, SRW, SB Crew Cab, FX4
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Old 09-27-2013, 06:55 PM   #3
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It could also be dirty. Air restrictions(dirt/crap) are the NO1 cause of a/c problems.
These systems are normally hermetically sealed(welded), so leaks are uncommon unless it just has a hole in it(no cooling).
Take the filter out and try to look at the intake/filter side of the evaporator(inside the TT) if you can see stuff, it's prolly dirty. A soft brush(aka old style hair brush) and lightly brush off in direction of coils running. Not against the fin direction. You can use a little spray cleaner like fantastic or 409 it won't hurt. Moist is better when cleaning.

Hope it fixes it.
totalled 04-11-16 by storm(picking up new one 10-26-16)
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Old 09-27-2013, 07:22 PM   #4
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both the suggestions above would be my choice also. if it still freezes up after making sure the evap coil is clean, look for a little thermostat attached to the evap coil. i've heard it described as being blue from a dometic rep. the thermostat should shut down the compressor if the coil gets too cold.
most likely it's going to be a problem with the air flow. on a walk thru, i was told that running the quick cool duct open for extended length of time would do this. i've never seen it happen but they saw fit to mention it.
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Old 10-03-2013, 12:10 PM   #5
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Thanks, I will check on all of these helpful tips and as far as the age of the AC it is 8 years old!!! Very much appreciated!!!
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