Reply
 
Thread Tools Display Modes
Old 11-10-2017, 10:01 AM   #1
Junior Member
 
Join Date: Mar 2017
Posts: 25
Furnace/heat pump

We have a 2018 Cardinal fifth wheel. We used the furnace and heat pump for the first time this weekend. Two separate questions...
First with the furnace, the thermostat is set to furnace and the fan will cycle on and blow warm air out of the floor vents, then cycle off. The entire time there is cold air coming from the round ceiling vents. Also, the furnace never completely shuts off, there is something running the whole time although not as loud as when the fan is blowing. So why is there cold air coming from the ceiling and why does it never shut off completely between cycles.
Second the heat pump, when I turn the thermostat to heat pump I only feel cold air out of the ceiling vents, it does not turn warm at all.
1jessicastafford is offline   Reply With Quote
Old 11-10-2017, 10:10 AM   #2
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
First question, if you have a digital thermostat and don't want the air coming out the ceiling A/C vents, set the fan (in fan mode) to AUTO.
This is a feature provided so the A/C blower distributes the warm air (that rises) throughout the coach. Having the fan on AUTO will stop this feature.

Second question, if the ambient temp is near the 40º mark, the heat pump is very inefficient and will not make warm air. Even when the heat pump is working, it can take minutes for warm air to come out the vents. How long did you wait?
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-10-2017, 01:14 PM   #3
"On the road again"
 
rjshiflet's Avatar
 
Join Date: Feb 2012
Location: Parker County Texas
Posts: 1,082
Send a message via AIM to rjshiflet
Quote:
Originally Posted by 5picker View Post
First question, if you have a digital thermostat and don't want the air coming out the ceiling A/C vents, set the fan (in fan mode) to AUTO.
This is a feature provided so the A/C blower distributes the warm air (that rises) throughout the coach. Having the fan on AUTO will stop this feature.

Second question, if the ambient temp is near the 40º mark, the heat pump is very inefficient and will not make warm air. Even when the heat pump is working, it can take minutes for warm air to come out the vents. How long did you wait?


Great response and exactly what we have experienced in our Cardinal. Heat pump worked flawlessly as long as the outside temperature was above about 40.
__________________

Robert & Estha Shiflet
Cardinal 3456RLX - '17 Ford F350 Lariat Ultimate - DRW w/B&W OEM Companion hitch
Nights Camping 2012 - 2019: 955 ~ Nights Camping 2020: 5 (Slowed a bit due to wife's knee replacement and then COVID-19)
rjshiflet is offline   Reply With Quote
Old 11-11-2017, 09:31 AM   #4
Junior Member
 
Join Date: Mar 2017
Posts: 25
The thermostat is digital but does not have an auto setting.
The outdoor temp was above 50 degrees.
1jessicastafford is offline   Reply With Quote
Old 11-11-2017, 09:44 AM   #5
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
Quote:
Originally Posted by 1jessicastafford View Post
The thermostat is digital but does not have an auto setting.
The outdoor temp was above 50 degrees.
Could you tell us what model # you have and maybe post a photo of the 'stat?
Information such as system/appliance manufacturer and model #'s will garner you better responses.

Otherwise we are just guessing and giving suggestions based on past topics.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-11-2017, 09:52 AM   #6
Junior Member
 
Join Date: Mar 2017
Posts: 25
The control

..
Attached Thumbnails
Click image for larger version

Name:	1E4B6546-2810-4BFD-8CD1-E661CF5E3D3F.jpg
Views:	63
Size:	293.8 KB
ID:	156205  
1jessicastafford is offline   Reply With Quote
Old 11-11-2017, 10:00 AM   #7
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
From page 7 of the Dometic Digital thermostat manual...

"Mode Selection
Press the On/Off Mode button to advance through the available modes. Each successive press will advance to the next available mode. The green LED will indicate the mode selected. Depending on the systems installed, your choices will be Off, Fan, Cool, Furnace, Heat Pump or Heat Strip. See "Mode Description" on pages 8-10 for more information on modes. Fan Speed Press the On/Off Mode button until the fan green LED is lit. The LCD will show "Lo" (Low), "Hi" (High) or "Au" (Auto). Press the "+" or"―" button to select the desired fan speed. See "Special Features"on page 11 for more information on Auto Fan.

Thermostat Manual Page # 7
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-11-2017, 10:04 AM   #8
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
From page 8 of the manual...

"Furnace" - Furnace Mode

In this mode there are 3 fan speed selections:
Lo - (LOW): The fan operates continuously at low speed.
Hi - (HIGH): The fan operates continuously at high speed.
Au - (AUTO): The fan will be OFF.

Note: If additional indoor air circulation provided by the air conditioner is not desired during Furnace Mode of operation, select Au(AUTO) in the Fan Mode to shut the air conditioner fan off. If Lo(LOW) or Hi (HIGH) is selected the air conditioner fan will continue to operate on the selected speed.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-11-2017, 11:10 AM   #9
Junior Member
 
Join Date: Mar 2017
Posts: 25
As I cycle through the modes auto is not a choice on this control. I have the same control in the front of my coach but it runs the low profile AC only, no furnace or heat pump and it has an auto selection. I’m stumped.
1jessicastafford is offline   Reply With Quote
Old 11-12-2017, 08:39 AM   #10
Senior Member
 
Join Date: Dec 2010
Location: East Berlin
Posts: 724
Auto is located in the fan speed section when in Furnace mode. I read that wrong a lot of times, my wife read it and said check the fan speed section. We special ordered a heat pump on our Cedar Creek. So it came with this style stat.
Rich5117 is offline   Reply With Quote
Old 11-12-2017, 11:50 AM   #11
Junior Member
 
Join Date: Mar 2017
Posts: 25
Thanks everyone, I figured it out!
1jessicastafford is offline   Reply With Quote
Old 11-12-2017, 01:12 PM   #12
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
Quote:
Originally Posted by 1jessicastafford View Post
Thanks everyone, I figured it out!
If you let everyone in on the fix, it helps others with similar issues.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-12-2017, 07:23 PM   #13
Junior Member
 
Join Date: Mar 2017
Posts: 25
I used the link to the manual online and the diagram and description on there helped with the series of buttons I need to push.
1jessicastafford is offline   Reply With Quote
Old 11-12-2017, 07:30 PM   #14
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 12,718
Super!
Glad you got it figured out.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=98
5picker is offline   Reply With Quote
Old 11-12-2017, 07:42 PM   #15
Senior Member
 
Thurman's Avatar
 
Join Date: Aug 2011
Location: Albany, GA.
Posts: 1,270
Someone please correct me on this if I'm wrong: From what I know an RV air conditioner, whether Dometic, Coleman, or Advent, are not true "heat pumps" as residential air conditioner/heat pump systems are. A residential A/C/heat pump has a reversing valve which allows the refrigerant to be pump backwards therefore capturing what heat may be in ambient air. I was taught that an RV A/C unit with "heat pump" configuration has an electrical heating element, much like an electric space heater, that has air flowing over it to create warm air.
Thurman is offline   Reply With Quote
Reply

Tags
furnace, pump

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 11:00 PM.