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Open Roads Forum  >  Tech Issues

 > A/C not cooling well

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ekirkland

Auburn, AL

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Posted: 09/07/17 02:09pm Link  |  Quote  |  Print  |  Notify Moderator

We have a 31' Jayco travel trailer with a single 15,000 btu A/C. While out west recently, it really struggled to keep the inside cool especially after being on the road 6-8 hours in the heat. With outside temp of 95, it would struggle to keep it below 85 until the sun started going down. Is this common or should I have it checked out?


Eddie & Liz
Auburn, AL
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donn0128

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Posted: 09/07/17 02:24pm Link  |  Quote  |  Print  |  Notify Moderator

Pretty common. But thats not to say, if it is a ducted unit that there is not some blockage. One time mine had a piece of foam insulation come loose partially blocking the air outlet. Take thr filter down and take a look.


Don,Lorri,and Charlie Bear 2016
The Other Dallas


Kayteg1

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Posted: 09/07/17 02:27pm Link  |  Quote  |  Print  |  Notify Moderator

If you pay attention on the road, you will notice that the bus conversion most of the time carry 4 or 5 AC units on the roofs.
That is what it takes to cool well insulated commercial bus in hot weather.
The original bus, engine-operated AC is rated about 40 HP.

darsben1

near Canada in NYS/ Casa Grande, AZ

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Posted: 09/07/17 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

Of course dirt/dust could have degraded the heat exchange capabilities of the unit. The shroud should be removed and the unit cleaned. This may improve the cooling ability specially if it has never been done.
Heat reflecting Shields can be put in some of the windows to lessen the heat loads.


Traveling with my best friend, my wife in a 1990 Southwind

stickdog

Somewhere, USA

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Posted: 09/07/17 02:47pm Link  |  Quote  |  Print  |  Notify Moderator

We were in Casa Grande AZ last March 102 degrees no shade our 1 15,0000 couldn't get us cooler than 84 inside. Have a new fiver to pick up at the end of the month 2 ft bigger but 2 AC's. Better insulation and double pane windows should help as well.


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ScottG

Bothell Wa.

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Posted: 09/07/17 03:03pm Link  |  Quote  |  Print  |  Notify Moderator

A lot has to do with how well the unit is insulated.
Our 4 season AF kept us cool last weekend in 95 degree heat with little effort. It ran less than half the time but it is very well built and insulated.
Our last TT absolutely struggled in the same place with the same heat but it was built before Reflectix insulation and just wasn't built as well.


Scott, Grace and Wesly
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mikefos

Fredericksburg, TX

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Posted: 09/07/17 03:37pm Link  |  Quote  |  Print  |  Notify Moderator

ekirkland wrote:

We have a 31' Jayco travel trailer with a single 15,000 btu A/C. While out west recently, it really struggled to keep the inside cool especially after being on the road 6-8 hours in the heat. With outside temp of 95, it would struggle to keep it below 85 until the sun started going down. Is this common or should I have it checked out?


We have the same single AC unit. We've found that bubble reflective insulation in the windows (got from Lowes I think) really helps. This last trip we also added those foam reflective insulating squares in the vents really improved things more.

After the last trip I removed the AC vent grill tubes and simply sealed with aluminum duct tape, hoping to improve air flow. Will see next year in hot weather.


Mike and Kim
2012 Jayco Eagle Super Lite 308RETS, TST 507 TPMS
2010 Chevy 2500HD, Duramax/Allison, 2WD, Long Bed, Crew Cab, Duraflaps, AMP Bedstep
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wa8yxm

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Posted: 09/07/17 04:01pm Link  |  Quote  |  Print  |  Notify Moderator

ekirkland wrote:

Is this common or should I have it checked out?


Well yes to the first question and it can't hurt save to cost money on the 2nd

Or self test.. Measure air temp at the Air Conditioner INLET and OUTLET (Where it blows back into the room) Generally 20 degrees different (Colder at the outlet of course) is consiered GOOD

A full test is a bit more involved and includes both intake and exhaust temps on the condenser (Up on the roof) and humidity inside and out in addition to the quick test temps above.

Then you need a book. Or a computer program.

This is beyond most RV technicians or shops by the way.


Home is where I park it.
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starcraft69

northern California(State Of Jefferson)

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Posted: 09/07/17 05:45pm Link  |  Quote  |  Print  |  Notify Moderator

I also have a 30' Jayco and had the same problem. This is what I have done and it made a huge difference. Read both read air duct sealing and part two.

A/C upgrade Mod


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louisiana

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Posted: 09/07/17 05:57pm Link  |  Quote  |  Print  |  Notify Moderator

no humidity to pull out no cool

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