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05-08-2019, 07:28 PM
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#1
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Established Member
Join Date: Jul 2017
Location: Lake Mary
Posts: 31
M.O.C. #20145
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Air Conditioner short cycles
Front AC set on Auto. It runs fine and no problem with blowing cold air. It will cut off for maybe 10 seconds and then it comes right back on. It does this repeatedly. Temp set at 73, and outside team around 83. Not sure why it is short cycling. Anyone else have this issue before?
Thanks for any input.
__________________
Keith and Jana Escue
2018 Montana 381TH
2016 Ford F350 King Ranch
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05-08-2019, 07:44 PM
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#2
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Montana Master
Join Date: May 2017
Location: South East NC
Posts: 1,768
M.O.C. #19865
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Is the fan on auto? If so put it on high and that should work.
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John & Patty
2022 3855 BR
2019 Lariat F350 4X4 Dually
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05-08-2019, 07:53 PM
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#3
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Montana Fan
Join Date: Nov 2018
Location: Virginia Beach
Posts: 287
M.O.C. #23051
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Quote:
Originally Posted by kescue
Front AC set on Auto. It runs fine and no problem with blowing cold air. It will cut off for maybe 10 seconds and then it comes right back on. It does this repeatedly. Temp set at 73, and outside team around 83. Not sure why it is short cycling. Anyone else have this issue before?
Thanks for any input.
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Mine does the same thing at 73 when it's in the low 80's?
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2019 Montana High Country 331RL
2017 Ford F250 Super Duty, 6.7 PSD
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05-08-2019, 07:56 PM
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#4
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Established Member
Join Date: Aug 2018
Location: Erda
Posts: 27
M.O.C. #22493
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What do you have the fan set to (auto, high, or low)? Could be unit is close to set point and is transitioning from high to low because of close proximity to set point. Also could be unit has frozen and is thawing itself out.
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2019 F350 DRW Crew Cab 4x4, 2018 Montana 3820fk, 300 watts solar, 3000 watt true sine inverter.
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05-08-2019, 08:12 PM
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#5
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Montana Fan
Join Date: Nov 2018
Location: Virginia Beach
Posts: 287
M.O.C. #23051
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Quote:
Originally Posted by Dhardy
What do you have the fan set to (auto, high, or low)? Could be unit is close to set point and is transitioning from high to low because of close proximity to set point. Also could be unit has frozen and is thawing itself out.
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Mine is normally set to "auto". Will running the fan on low which is all the time make a difference?
__________________
2019 Montana High Country 331RL
2017 Ford F250 Super Duty, 6.7 PSD
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05-08-2019, 08:22 PM
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#6
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Established Member
Join Date: Aug 2018
Location: Erda
Posts: 27
M.O.C. #22493
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I would run it on high as it will be less likely to ice up.
__________________
2019 F350 DRW Crew Cab 4x4, 2018 Montana 3820fk, 300 watts solar, 3000 watt true sine inverter.
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05-08-2019, 08:27 PM
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#7
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Established Member
Join Date: Jul 2017
Location: Lake Mary
Posts: 31
M.O.C. #20145
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It was set on Auto. Unit is at house getting loaded up for trip next week. Just turned AC off for tonight. I will set it on High tomorrow to test it out. Will update on what is up.
Thanks
__________________
Keith and Jana Escue
2018 Montana 381TH
2016 Ford F350 King Ranch
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05-08-2019, 08:29 PM
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#8
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Montana Fan
Join Date: Nov 2018
Location: Virginia Beach
Posts: 287
M.O.C. #23051
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Quote:
Originally Posted by kescue
It was set on Auto. Unit is at house getting loaded up for trip next week. Just turned AC off for tonight. I will set it on High tomorrow to test it out. Will update on what is up.
Thanks
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Interested in what you find out!
__________________
2019 Montana High Country 331RL
2017 Ford F250 Super Duty, 6.7 PSD
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05-08-2019, 10:08 PM
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#9
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Site Team
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 1,993
M.O.C. #19755
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Quote:
Originally Posted by kescue
Front AC set on Auto. It runs fine and no problem with blowing cold air. It will cut off for maybe 10 seconds and then it comes right back on. It does this repeatedly. Temp set at 73, and outside team around 83. Not sure why it is short cycling. Anyone else have this issue before?
Thanks for any input.
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I don't think it is short cycling. With the fan set to auto, the fan will switch from high to low as it cools to within a few degrees of the set point. The fan will switch from low to high as the temp warms. This is normal. As others have said, you can avoid this behavior (and a other issues) by setting the fan to high.
__________________
Scott & Alta
2017 Montana 3160RL, Legacy, Onan 5.5Kw, Solar
2022 F-450 Lariat Ultimate
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05-09-2019, 07:43 AM
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#10
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Montana Master
Join Date: Dec 2017
Location: Mountain Home
Posts: 864
M.O.C. #20949
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I’d remove the two return air grills for that AC unit and use a cell phone camera and take a few pics on both vent ducts...
It sure sounds like you have at least one return duct partially collapsed...occurs quite often ....
If collapsed use a piece of 2 inch PVC pipe cut to length of collapsed duct area and work it up into the duct to open duct back up
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