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Old 08-07-2022, 07:42 PM   #1
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Front AC not blowing cold

Hi
Our 2011 Allegro Open Road 34TGA has suddenly stopped blowing cold air from the front unit ( the back is fine )
The front is blowing “cool” air but not cold ( struggling to get the temp below 79 , even with the back one going)

What was strange was , this morning , it was dripping water off the roof , but the AC was off all night ie it was dripping water as though the AC was on

Any ideas?
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Old 08-07-2022, 08:06 PM   #2
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It's possible the evaporator coils froze over and the excess runoff was when they thawed out.
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Old 08-07-2022, 08:10 PM   #3
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Thanks
But that was this morning with the AC off all night
Its now 7pm and its been running all day ( but not blowing cold )
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Old 08-07-2022, 09:19 PM   #4
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In one of my roof a/c units on a travel trailer the unit froze up and did not blow cold and like you dripped water. I took it apart and found it froze up solid. Took almost 3 days to end up clear of ice. You may just have to wait it out? Shut it off and allow it to thaw and it will drip. Once i got it working again I inspected the air chambers and resealed all the areas where the cold and return air could mix. Seemed to fix the problem.
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Old 08-08-2022, 06:53 AM   #5
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Are the AC units ducted? If so, the water may not be coming from that unit, but running inside the duct from the rear unit.

I would check your condensation drain lines to see if they are plugged. The duckbill ends have a tendency to catch & plug up the lines. I would blow out the lines with a compressor. Best to go from the unit out. If you go from the duckbill ends, you may find out that a connection inside the AC unit doesn't have a clamp on it - resulting in water dripping inside like you have now. Just a little real time experience.

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Old 08-08-2022, 07:22 AM   #6
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Quote:
Originally Posted by DRM901 View Post
Are the AC units ducted? If so, the water may not be coming from that unit, but running inside the duct from the rear unit.

I would check your condensation drain lines to see if they are plugged. The duckbill ends have a tendency to catch & plug up the lines. I would blow out the lines with a compressor. Best to go from the unit out. If you go from the duckbill ends, you may find out that a connection inside the AC unit doesn't have a clamp on it - resulting in water dripping inside like you have now. Just a little real time experience.

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What DRM 901 said. We used a hair dryer to thaw out AC condenser out.

Drain tubes were plugged. Also replaced AC condenser pump. Was not pumping condensation and was dripping off ceiling on new coach.
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Old 08-10-2022, 01:58 PM   #7
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If the unit is indeed frozen up, turn off the AC and just run the fan on high, it will help melt the ice.
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