Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 10-16-2017, 12:21 PM   #1
Member
 
Join Date: Sep 2016
Posts: 34
Furnace vs Heat Pump

Had this odd thing happen with getting heat in the RV, and this has never happened in my previous 2 RVs that had the furnace or heat pump option.

I was dry camping and it got cold so I turned on the "furnace" setting via the Dometic thermostat. Worked perfect. Later on I turned on the generator and the air conditioner/heat pump on the ceiling turned on, even though "furnace" was still my setting. First I had cold air blowing out, then it turned warm, and then when it hit 68 degrees, it blew cold air again and did not cycle off. However, I did not want to use the heat pump, I think the propane furnace works better.

I cannot find anything about this in the Dometic booklet. How do I stop the heat pump from turning on when I have furnace selected? Hope this all made sense.
Dog Show Gal is offline   Reply With Quote
Old 10-16-2017, 12:26 PM   #2
Senior Member
 
MNtraveler's Avatar
 
Join Date: Oct 2015
Posts: 2,263
Quote:
Originally Posted by Dog Show Gal View Post
Had this odd thing happen with getting heat in the RV, and this has never happened in my previous 2 RVs that had the furnace or heat pump option.

I was dry camping and it got cold so I turned on the "furnace" setting via the Dometic thermostat. Worked perfect. Later on I turned on the generator and the air conditioner/heat pump on the ceiling turned on, even though "furnace" was still my setting. First I had cold air blowing out, then it turned warm, and then when it hit 68 degrees, it blew cold air again and did not cycle off. However, I did not want to use the heat pump, I think the propane furnace works better.

I cannot find anything about this in the Dometic booklet. How do I stop the heat pump from turning on when I have furnace selected? Hope this all made sense.
If you go to your fan setting, I'll bet it's set to LO or HI, not to AUTO. When that happens, the fan on the AC/heat pump will go on whether you call for heat or air or not. Always leave this on AUTO. The LO and HI settings are nothing but trouble.
__________________
2016 FR Forester 2401R
Towing 2014 Honda CR-V
MNtraveler is offline   Reply With Quote
Old 10-16-2017, 12:28 PM   #3
Senior Member
 
sgtlm17's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,363
It sounds like your fan setting is not in auto mode but rather set to high or low. Select fan on thermostat. Then select auto. If not in auto mode when using furnace and rig
Has 120v via power cord or generator the ceiling fan will come on. Here's a video how that thermostat works.
https://youtu.be/PQumILC3yv0
__________________
2016 Forester GTS 2801QSF
2011 Jeep JK Toad
Habitual RV Modifier
sgtlm17 is offline   Reply With Quote
Old 10-16-2017, 12:42 PM   #4
Member
 
Join Date: Sep 2016
Posts: 34
You are my HEROES, both of you!!!!! Thank you and the video was perfect. I just checked the RV and the fan was set to Lo. I will let you know if I have any problems next weekend when it is supposed to be very cold at night.

Quote:
Originally Posted by sgtlm17 View Post
It sounds like your fan setting is not in auto mode but rather set to high or low. Select fan on thermostat. Then select auto. If not in auto mode when using furnace and rig
Has 120v via power cord or generator the ceiling fan will come on. Here's a video how that thermostat works.
https://youtu.be/PQumILC3yv0
Dog Show Gal is offline   Reply With Quote
Old 10-16-2017, 12:43 PM   #5
Senior Member
 
sgtlm17's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,363
Your very welcome
__________________
2016 Forester GTS 2801QSF
2011 Jeep JK Toad
Habitual RV Modifier
sgtlm17 is offline   Reply With Quote
Old 10-16-2017, 06:01 PM   #6
Senior Member
 
MNtraveler's Avatar
 
Join Date: Oct 2015
Posts: 2,263
Glad it is resolved!
__________________
2016 FR Forester 2401R
Towing 2014 Honda CR-V
MNtraveler is offline   Reply With Quote
Old 10-16-2017, 06:22 PM   #7
Senior Member
 
xgarys's Avatar
 
Join Date: Sep 2017
Posts: 262
I'm glad you got it taken care of. Out of curiosity, what breed(s)?
xgarys is offline   Reply With Quote
Old 10-16-2017, 06:27 PM   #8
Member
 
Join Date: Sep 2016
Posts: 34
Quote:
Originally Posted by xgarys View Post
I'm glad you got it taken care of. Out of curiosity, what breed(s)?
Pointers!!!
Dog Show Gal is offline   Reply With Quote
Old 10-16-2017, 06:36 PM   #9
Senior Member
 
xgarys's Avatar
 
Join Date: Sep 2017
Posts: 262
Nice! We're not breeders but we favor Whippets.
xgarys is offline   Reply With Quote
Old 10-16-2017, 06:47 PM   #10
Just as confused as you
 
Scrapper's Avatar
 
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
One thing to point out is if your A/C is on the roof then you have an electric heat element inside it. A true heat pump is just a A/C with the compressor running in reverse and they are generally mounted in a side wall. Also a heat pump is useless below 40 degrees.
__________________
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
Scrapper is offline   Reply With Quote
Old 10-17-2017, 01:00 PM   #11
Member
 
Join Date: Jun 2017
Posts: 63
Agree. We use the heat pump to take the chill off
But use the furnace at 40 and below.
CDRJML is offline   Reply With Quote
Old 10-26-2017, 12:22 PM   #12
Senior Member
 
Kirk S's Avatar
 
Join Date: Jan 2017
Location: Savannah
Posts: 783
Quote:
Originally Posted by Scrapper View Post
One thing to point out is if your A/C is on the roof then you have an electric heat element inside it. A true heat pump is just a A/C with the compressor running in reverse and they are generally mounted in a side wall. Also a heat pump is useless below 40 degrees.
Interesting. My Forester 3051 with the Dometic 15k roof air is supposed to be a true heat pump without the heating element. I'll have to investigate further.
__________________
Kirk
2017 Forester 3051S
Kirk S is offline   Reply With Quote
Old 10-26-2017, 01:26 PM   #13
Senior Member
 
Join Date: Mar 2016
Location: N California mountains
Posts: 238
Quote:
Originally Posted by Scrapper View Post
One thing to point out is if your A/C is on the roof then you have an electric heat element inside it. A true heat pump is just a A/C with the compressor running in reverse and they are generally mounted in a side wall. Also a heat pump is useless below 40 degrees.

The AC in my old old Class C had a heat strip, the AC in my 2017 Forester is a heat pump, no heat strip. You can hear the compressor running in the heating mode and yes, it doesn't work well below 40 degrees, we use the propane furnace then.

The compressor doesn't run in reverse in heat pump mode, the valving reverses the refrigerant flow to switch the function of the condenser and evaporator coils to remove heat from the outside and expel it to the inside of the RV.
__________________
2017 Forester 2861DS
towing 2015 Jeep Rubicon
fobagbob is offline   Reply With Quote
Old 10-26-2017, 10:13 PM   #14
Senior Member
 
MNtraveler's Avatar
 
Join Date: Oct 2015
Posts: 2,263
Our Dometic AC is also a heat pump not electric heat strip and is located on the roof. True about 40 degrees, use furnace in that range or lower, or electric resistance type space heater if you prefer.
MNtraveler is offline   Reply With Quote
Old 10-30-2017, 08:13 AM   #15
Senior Member
 
Join Date: Jul 2015
Location: Charlotte, NC
Posts: 921
Interestingly enough on a recent trip to NC I turned on the heat pump expecting the temp to go down to 43 and woke up in the middle of the night because I did not hear the fan on the Heat Pump running. (we always set it to constant Lo speed and not Au at night). It sounded almost like it had frozen up. I turned on the furnace and all was well. Later that morning I discovered the temp in our area actually went down to 37 which might explain why the heat pump stopped working. I always thought that a heat pump would just not output any warm air if the outside temp was below 40, didn't think it would stop working entirely. A few days later we used the heat pump again with no issues but it only went down to about 50.
newRVer is offline   Reply With Quote
Old 10-31-2017, 09:39 AM   #16
Senior Member
 
MNtraveler's Avatar
 
Join Date: Oct 2015
Posts: 2,263
The coils freeze up.
__________________
2016 FR Forester 2401R
Towing 2014 Honda CR-V
MNtraveler 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 03:07 PM.