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07-16-2022, 03:28 PM
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#1
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Established Member
Join Date: Jun 2022
Location: Bakersfield
Posts: 17
M.O.C. #31171
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3813ms AC units
We got my mom's new 5th wheel settled in the central valley of California (100+ temps in summer), and immediately found the AC units did not work at all. One was not plugged in, the other had cut wires. After messing with the dealer for a few days, they finally approved on-site service and those issues were fixed.
Unfortunately, now that the temp has gone up to over 100, she is only able to lower the temp in the LR to 10 degrees or less than the outside temp. The service man said it should be around an 18 degree split, but this is not even close. Not feeling cool air coming out of those weird crappy ducts at all.
Has anyone else dealt with this and have a solution? We are in the process of finding another service man to come out (her regular guy is off work for a few weeks) but had to literally fight with Keystone to approve it. Thank you.
__________________
*Sharon for Barbara (She's 90 and still rollin')
*2022 Montana 3813ms
*2017 Dodge Ram (Don't know what model but it's big )
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07-31-2022, 12:26 PM
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#2
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Established Member
Join Date: Jun 2022
Location: Bakersfield
Posts: 17
M.O.C. #31171
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Could anyone at least tell me what your AC unit BTUs are for a 40-42 foot 5th wheel?
__________________
*Sharon for Barbara (She's 90 and still rollin')
*2022 Montana 3813ms
*2017 Dodge Ram (Don't know what model but it's big )
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07-31-2022, 08:37 PM
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#3
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,888
M.O.C. #19944
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our 373RD came with a 15k main unit and 13.5k in bedroom - this is a 41' unit. we added a third unit in the kitchen - 13.5k. It takes several hours from an internal temp of 95 to get in the up 70's.
__________________
RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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07-31-2022, 08:38 PM
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#4
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,888
M.O.C. #19944
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there are numerous mods you can do to make it cool better if you search the files
__________________
RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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07-31-2022, 09:35 PM
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#5
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Established Member
Join Date: Jun 2022
Location: Bakersfield
Posts: 17
M.O.C. #31171
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Thank you. I'm really annoyed with the dealer. They knew where it was going and the temps and didn't bother to warn us. Anyway, in the meantime, I did find all the different conversations regarding changes that can be made. Thank you!
__________________
*Sharon for Barbara (She's 90 and still rollin')
*2022 Montana 3813ms
*2017 Dodge Ram (Don't know what model but it's big )
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08-01-2022, 06:33 AM
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#6
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,695
M.O.C. #24086
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There is a long list of things to check or modify to help with AC.
Search the forum for Air Conditioner or other terms for ideas where to start with your project.
While cleaning the air return filters I noticed in the rear return there was a gap I could put my finger through into the attic. I taped it up. Found a 3 finger gap in the forward air return.
Also some insulation partially cover the return obstructing it. Trim the return opening almost as wide as the plastic opening so nothing restricts the return air.
Another modification is to cut out every other fin of the ceiling vent. This helps increase airflow.
We also changed the bathroom register to one that closes to redirect the air to elsewhere.
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08-01-2022, 08:19 AM
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#7
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,233
M.O.C. #30417
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Search youtube for RV ac mods. You'll find a lot there.
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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08-01-2022, 12:21 PM
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#8
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Established Member
Join Date: Jun 2022
Location: Bakersfield
Posts: 17
M.O.C. #31171
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These are good starts. Thank you!
__________________
*Sharon for Barbara (She's 90 and still rollin')
*2022 Montana 3813ms
*2017 Dodge Ram (Don't know what model but it's big )
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08-02-2022, 08:36 AM
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#9
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Reflective bubble insulation on the windows you aren't using and particularly ones on the sun side will help a lot. Her rig is also prewired to add a third AC where one of the vents is. Look for the junction box cover next to the vent. The controler for that vent will also have the control cord behind it for the thermostat.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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08-02-2022, 05:33 PM
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#10
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Established Member
Join Date: Jun 2022
Location: Bakersfield
Posts: 17
M.O.C. #31171
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Thank you. I think at this point, that is what we are considering with the AC. I read that you can't run three at once without major electrical changes but we might move her bedroom one into the LR space. She says she is always too cold up there anyway. She has really good blinds and awnings. Doesn't get alot of direct sun on the sides, just the top, unfortunately.
__________________
*Sharon for Barbara (She's 90 and still rollin')
*2022 Montana 3813ms
*2017 Dodge Ram (Don't know what model but it's big )
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08-02-2022, 09:59 PM
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#11
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Montana Master
Join Date: Nov 2012
Location: Rancho Santa Margarita
Posts: 633
M.O.C. #13025
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You are right that you can only run 2 units at once. Another option is to get a portable air conditioner from Home Depot or Lowes like this one. If you have 50 amp service you can plug in the portable air conditioner on the 20 amp circuit on the pedastal and run the 12 gauge extension cord through the slide out.
https://www.homedepot.com/p/Toshiba-...CWRU/314620248
__________________
Russ and Linda, So. California
2004 Chevy Silverado 2500 HD, D/A, SRW, SB
2005 2955RL, Pullrite Superglide 16K hitch. Bridgestone Duravis R500 tires. EZ Flex Equilizers with wet bolts.EMS HW50C, Disk brakes
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08-02-2022, 11:21 PM
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#12
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,365
M.O.C. #4831
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Quote:
Originally Posted by h2ojocky
.......You are right that you can only run 2 units at once.....
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You can run 3 ACs IF you have 50 amp service and you manage the loads across the two buses and avoid other large power consumers (microwave, water heater, dryer, etc.) at the same time.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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