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05-25-2018, 07:18 PM
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#1
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Member
Join Date: May 2014
Posts: 39
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AC concern
The AC is been acting up recently in that the volume of air has decreased. Such that on warm days it’s simply cannot pull the trailer. Today I heard some noises in the unit and then after a few minutes I heard a lot of noise... sounding like the breeze blowing through the duck work. Makes me wonder if there had been a mud dauber nest. How could something get in the ductwork like that? How does one clean it out? Is there any servicing on the roof of the trailer that is necessary to keep the air-conditioner functioning at its best?
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05-25-2018, 07:19 PM
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#2
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by stepheneadams
The AC is been acting up recently in that the volume of air has decreased. Such that on warm days it’s simply cannot pull the trailer. Today I heard some noises in the unit and then after a few minutes I heard a lot of noise... sounding like the breeze blowing through the duck work. Makes me wonder if there had been a mud dauber nest. How could something get in the ductwork like that? How does one clean it out? Is there any servicing on the roof of the trailer that is necessary to keep the air-conditioner functioning at its best?
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I should clarify that after the debris was blowing through the vents the volume of air increased and it begin cooling the trailer. So it seems like the issue has been solved but I need a little guidance on how to clean it up and prevent it from happening again
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05-26-2018, 07:06 PM
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#3
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Member
Join Date: May 2014
Posts: 39
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Ok, it did it again. Left the trailer for 9 hrs. AC on. Get back...hot trailer. Turn AC to fan only, go take a shower, turn AC on...cold air. ??
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05-26-2018, 07:11 PM
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#4
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,079
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Do you have the fan on low, if so.it's probably freezing up. Run the fan on high and it won't freeze.
__________________
 DISNEY LOVERS
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05-26-2018, 07:12 PM
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#5
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by Grumpy
Do you have the fan on low, if so.it's probably freezing up. Run the fan on high and it won't freeze.
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Yes it was on low.
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05-26-2018, 07:15 PM
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#6
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,079
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Quote:
Originally Posted by stepheneadams
Yes it was on low.
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Low fan + humidty means a frozen coil.
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05-26-2018, 10:07 PM
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#7
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Senior Member
Join Date: May 2012
Location: Minnesota
Posts: 9,769
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How often do you clean the cold air return foam filters?
If they are dirty they restrict the air flow.
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05-26-2018, 10:08 PM
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#8
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by Jagiven
How often do you clean the cold air return foam filters?
If they are dirty they restrict the air flow.
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Once a season. Did it yday and it failed today.
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05-26-2018, 10:09 PM
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#9
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by Grumpy
Low fan + humidty means a frozen coil.
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I wondered if that was still an issue with ACs. I recall it as a kid with a window unit.
Yes, Missouri loves it’s humidity.
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05-26-2018, 10:10 PM
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#10
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Member
Join Date: May 2014
Posts: 39
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Is there anything on the roof which needs maintenance?
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05-27-2018, 05:31 AM
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#11
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Senior Member
Join Date: Jul 2014
Posts: 957
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Those mean little #$%^'s that sting also like to build nests inside the AC cover up on the roof, so they may have a nest that is blocking the airflow as well. Grab a can of hornet/wasp spray and take a looksee.
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05-27-2018, 06:33 AM
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#12
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Site Team
Join Date: Jan 2011
Location: James Island, SC
Posts: 22,851
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Look up into the unit from the inside and see if you see a small wire temperature probe stuck in the evaporator coil. If it's hanging loose it can cause the unit to freeze up.
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05-27-2018, 07:31 AM
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#13
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Senior Member
Join Date: Aug 2017
Location: Kingston
Posts: 1,210
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I used to clean my AC every year. One year we camped near a cottonwood tree during the budding season. It looked like snow falling. I opened the exterior (shell) of the AC and pulled a one inch thick layer of cotton buds off the condenser. Later in the fall after arriving in Texas for winter camp my AC didn't seam to keep up. I called a friend and we started looking. He opened the sealed side of the condenser (several small screws and aluminum tape) where the temp probe is and we found the inside of the condenser was 40% clogged. After laying many beach towels and blankets down, using three bottles of 409, holding up a plastic trashcan (inside and under the AC unit) what seamed like an eternity, and getting a shower of hose water, my friend got the AC clean. Oh, did I forget to say the inside of the AC never had been cleaned? Although it was a one AC 5r, and the cooling was never enough of the DW, we had cooler and definitely more air flow after it was done.
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05-27-2018, 09:34 AM
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#14
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Senior Member
Join Date: May 2012
Location: Minnesota
Posts: 9,769
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Those little foam filters should be cleaned, 3 to 10 days.
I too would recommend pulling the outside cover, and cleaning the coils.
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06-12-2018, 05:57 PM
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#15
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Senior Member
Join Date: Jun 2016
Location: Tooele
Posts: 187
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Sounds like a frozen coil nd maybe the fan hits the ice. Try leaving the fan on high for an hour or so and then never run the ac on anything but high speed.
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HVAC Tech
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06-12-2018, 08:25 PM
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#16
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by Sunflake
Sounds like a frozen coil nd maybe the fan hits the ice. Try leaving the fan on high for an hour or so and then never run the ac on anything but high speed.
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Seems like a common response so I will give it a go next time out. Thx
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06-12-2018, 08:27 PM
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#17
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Member
Join Date: May 2014
Posts: 39
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Quote:
Originally Posted by DonaandDon
I used to clean my AC every year. One year we camped near a cottonwood tree during the budding season. It looked like snow falling. I opened the exterior (shell) of the AC and pulled a one inch thick layer of cotton buds off the condenser. Later in the fall after arriving in Texas for winter camp my AC didn't seam to keep up. I called a friend and we started looking. He opened the sealed side of the condenser (several small screws and aluminum tape) where the temp probe is and we found the inside of the condenser was 40% clogged. After laying many beach towels and blankets down, using three bottles of 409, holding up a plastic trashcan (inside and under the AC unit) what seamed like an eternity, and getting a shower of hose water, my friend got the AC clean. Oh, did I forget to say the inside of the AC never had been cleaned? Although it was a one AC 5r, and the cooling was never enough of the DW, we had cooler and definitely more air flow after it was done.
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We clean the inside filter every season but hv not looked under the covers topside. Something else for the to-do list.
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