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09-18-2020, 01:42 PM
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#1
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Senior Member
Join Date: Feb 2012
Location: Bella Vista, Arkansas
Posts: 5,389
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Dometic A/C-Heat Pump Problem?
This morning after the HP would turn off the fan kept running. Now after the A/C turns off the fan keeps running. I turned off the breaker and it still does it.
I looked for a fuse at the thermostat, but I could not find one.
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Raymond, Dee Dee and Sophie (Yorkie)
2023 Chevrolet 2500HD LT 4X4
2024 Grand Design Reflection 296RDTS
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09-18-2020, 01:58 PM
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#2
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Junior Member
Join Date: Jul 2015
Posts: 14
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By "after the A/C turns off the fan keeps running" do you mean after the compressor cycles off on its own, or do you mean you manually shut the AC off? If the former that is normal if the fan mode is not set to Auto.
Mike
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09-18-2020, 03:37 PM
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#3
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Senior Member
Join Date: Feb 2012
Location: Bella Vista, Arkansas
Posts: 5,389
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Quote:
Originally Posted by Tinmania
By "after the A/C turns off the fan keeps running" do you mean after the compressor cycles off on its own, or do you mean you manually shut the AC off? If the former that is normal if the fan mode is not set to Auto.
Mike
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The fan keeps running and running. After running about 15 minutes I turned that AC/HP off when we left.
__________________
Raymond, Dee Dee and Sophie (Yorkie)
2023 Chevrolet 2500HD LT 4X4
2024 Grand Design Reflection 296RDTS
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09-18-2020, 04:51 PM
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#4
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Senior Member
Join Date: Feb 2012
Location: Bella Vista, Arkansas
Posts: 5,389
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The A/C will run normally until it shuts off, but the fan will continue to run until the A/C kicks back on.
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Raymond, Dee Dee and Sophie (Yorkie)
2023 Chevrolet 2500HD LT 4X4
2024 Grand Design Reflection 296RDTS
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09-18-2020, 06:40 PM
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#5
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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If fan is ON it will run 24/7 untill you turn it off. I run mine sometime just to circulate some air.
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2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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09-18-2020, 06:45 PM
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#6
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2014
Posts: 3,539
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What is the HP?
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2020 F28 RKS Titanium
2017 Creekside 23 RBS Sold
2016 F250 Super Crew XLT Overworked
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09-18-2020, 06:58 PM
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#7
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Senior Member
Country Coach Owners Club
Join Date: Jan 2006
Location: Northern California
Posts: 5,868
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Quote:
Originally Posted by reubenray
The A/C will run normally until it shuts off, but the fan will continue to run until the A/C kicks back on.
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That is the way my AC / heat pump roof units have always worked. If the room air is at temp it does not more heat or cool. But the fan keeps working until turned off. 
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Dean
1995 38' CC Magna #5280 **** Sold after 21 years of enjoyment.
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09-18-2020, 07:08 PM
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#8
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,451
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If the rv is new to you have you accidently turned the fan on to run continuously?
There is a procedure to reset the control panel on mine but it is a 5 button Duotherm Dometic. Just a thought.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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09-18-2020, 07:29 PM
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#9
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Senior Member
Join Date: Feb 2012
Location: Bella Vista, Arkansas
Posts: 5,389
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Quote:
Originally Posted by YC1
If the rv is new to you have you accidently turned the fan on to run continuously?
There is a procedure to reset the control panel on mine but it is a 5 button Duotherm Dometic. Just a thought.
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I finally found my manual and a reset did it.
Thanks!!
__________________
Raymond, Dee Dee and Sophie (Yorkie)
2023 Chevrolet 2500HD LT 4X4
2024 Grand Design Reflection 296RDTS
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09-18-2020, 07:31 PM
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#10
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Community Moderator
Monaco Owners Club
Join Date: Jul 2016
Location: Central, Arkansas
Posts: 11,290
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If you set your fan mode to anything besides Auto it will run constantly.
__________________
2004 Beaver Monterey Laguna IV
Cummins ISC 350HP Allison 3000 6 speed
2020 Chevy Equinox Premier 2.0t 9 speed AWD
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09-18-2020, 07:46 PM
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#11
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,951
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Is the fan setting on auto? The on position makes it run constantly.
Quote:
Originally Posted by keymastr
What is the HP?
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heat pump
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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09-19-2020, 03:23 AM
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#12
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Senior Member
Join Date: Jul 2018
Posts: 3,165
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Quote:
Originally Posted by keymastr
What is the HP?
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Air conditioning and Heat pump. They are the very same piece of equipment with two different names. Some people think the are two different units up there. There is not. HP is just an A/C compressor running with the gases in to opposite direction do to a reversing valve to produce heat inside the RV instead of cool. One Compresser and one fan motor (some have two fan motors.) As stated above, you can turn on Just the fan without the compressor to circulate air. That is what was going on in this post.
__________________
2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
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09-19-2020, 08:12 AM
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#13
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,451
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Quote:
Originally Posted by reubenray
I finally found my manual and a reset did it.
Thanks!!
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Glad that fixed it.
Here are several files for future use. Download and save them. When you open one of the PDF files there may be yellow post it notes. Mouse over and click if necessary to make them pop up. There is information attached gathered over the last 12 years.
https://1drv.ms/u/s!Aqrv2TUdbV6xj2-4...51jxf?e=dzphMz
Cheers.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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Linear Mode
