Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-05-2011, 07:59 AM   #1
Rivet Master
 
RichHog's Avatar
 
2006 25' Safari FB SE
1972 25' Tradewind
Houston , Texas
Join Date: Feb 2009
Posts: 1,142
Images: 7
Duotherm AC blows hot not cold

My 2006 Safari FbLe has the Duotherm unit with heat pump. Bought it in Oct and used furnace so here we are in Orlando and turned on AC last night for first time. Cool air for about 5 minutes that turns to hot. Reset breaker no difference. Know an AC unit that blows hot not good. So anything I can check do myself? Approx cost to repair? Should take to a place like camping World (Houston) to repair or other dealers, don't know if can find service in Orlando?
__________________

__________________
RichHog is offline   Reply With Quote
Old 04-05-2011, 08:15 AM   #2
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Hey Rich,

Your heat pump is stuck in heating mode. All Dometic heat pumps are in the heating mode in the un-energized state. When the thermostat calls for cooling, a reversing valve that is solenoid controlled changes the direction of the flow of the refrigerant and the unit works as an air conditioner. If you run the unit and remove the shroud, you will notice that the outside coil (normally the condenser) is actually cold (is functions as the evaporator in heat pump mode).

The cause of your problem is that the reversing valve solenoid is either 1. not working and needs to be replaced or 2. (worst case) the reversing valve itself is stuck in the heat pump mode and the ENTIRE HEAT PUMP UNIT must be replaced.

An easy test is to check the coil for continuity at the disconnected leads. IIRC, one lead goes into the relay board and the other to a capacitor. No continuity or a reading outside the nominal resistance (I don't recall the ohms value), then it should be replaced and your unit will cool again!

I would NOT let CW touch it, as they will more than likely not have a clue as to the cause that I have just explained. Thee are several good mobile techs in the Orlando area. When you call, tell them that you believe that the reversing valve coil is bad. I would NOT have a service call unless they have the replacement coil in stock. (They are regular stock items on my service truck).
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 04-05-2011, 08:53 PM   #3
Rivet Master
 
RichHog's Avatar
 
2006 25' Safari FB SE
1972 25' Tradewind
Houston , Texas
Join Date: Feb 2009
Posts: 1,142
Images: 7
Thanks Lew for the reply. What costs are we talking about for 1 or 2. $ wise?
If you know a techs I can call in Orlando might be worth a shot.
The PO was from PA and probably barely used the AC on his trips. Least a cool front came in this morning making it not unbearable.
__________________
RichHog is offline   Reply With Quote
Old 04-05-2011, 09:23 PM   #4
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Quote:
Originally Posted by RichHog View Post
Thanks Lew for the reply. What costs are we talking about for 1 or 2. $ wise?
If you know a techs I can call in Orlando might be worth a shot.
The PO was from PA and probably barely used the AC on his trips. Least a cool front came in this morning making it not unbearable.
A reversing valve coil should be about $39 plus installation, which is fairly easy and should take about 30-45 minutes on your A/S.

OTOH, a new unit, assuming it's a 13.5K Penguin heat pump runs $1261 plus shipping and installation (Dometic part # 651516.301C0). I would figure at least a couple of hours for an install on an A/S, maybe 3 with that drip pan thing!
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 04-06-2011, 08:03 AM   #5
Rivet Master
 
RichHog's Avatar
 
2006 25' Safari FB SE
1972 25' Tradewind
Houston , Texas
Join Date: Feb 2009
Posts: 1,142
Images: 7
Well let's hope it's the valve coil. Seems like a 4 yr old trailer with very little use on the AC shouldn't require complete replacement. Tried to run the heat pump last night and it didn't heat very well in that mode. Used the furnace instead.
__________________
RichHog is offline   Reply With Quote
Old 04-06-2011, 02:13 PM   #6
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
Quote:
Originally Posted by lewster View Post
Your heat pump is stuck in heating mode. All Dometic heat pumps are in the heating mode in the un-energized state. When the thermostat calls for cooling, a reversing valve that is solenoid controlled changes the direction of the flow of the refrigerant and the unit works as an air conditioner.
Lewster is correct.

Another piece of evidence that whoever designed the controls for the Dometic heat pumps spent their whole life inside a skinner box.
__________________
Jammer is offline   Reply With Quote
Old 04-06-2011, 02:39 PM   #7
Rivet Master
 
Currently Looking...
Nowhere , Somewhere
Join Date: Jul 2005
Posts: 6,418
Blog Entries: 2
Question, is the fan on auto? On mine the thermistat must be set much lower than the required temp to get the thing to work and it still takes several minutes to get continuous cold air. Taking the fan off auto and putting it on high also seems to hasten cool air. I still do not know what the zone indicater on the thermastat means, zonne 1 or? Hot already isn'f it? zz
__________________
avionstream is offline   Reply With Quote
Old 04-06-2011, 10:47 PM   #8
Rivet Master
 
RichHog's Avatar
 
2006 25' Safari FB SE
1972 25' Tradewind
Houston , Texas
Join Date: Feb 2009
Posts: 1,142
Images: 7
The zone indicator, I believe for controlling multiple units. You can set zone two and control say a bedroom unit temps.

Anybody know exact model on a 2006 FB25" with heat pump? The spec sheet on the trailer says 11,000 BTU but I thought the standard issue was 13,500?

Leaster, service call in Orlando $90/hr + $90 trip charge . Think will wait and take it to PPI when we get back to Houston or take a shot at troubleshooting the valve. What tool does it take to take off the shroud?

R
__________________
RichHog is offline   Reply With Quote
Old 04-07-2011, 06:34 AM   #9
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Those prices are pretty standard for FL. Also depends on how good the tech is.

You need a phillips #2 screwdriver to remove the shroud (one screw at each corner) and a 5/16 nut driver for the control box cover. BE SURE THAT THE 120VAC CIRCUIT BREAKER IS OFF!!! You will see the solenoid on top of the reversing valve (next to the compressor) with 2 black wires coming from it. Follow the wires into the control box and disconnect them from the relay board and capacitor (hot at the board and neutral at the capacitor).

Now check the solenoid for continuity. If it is open, you need a new solenoid coil. If it is good, you have a stuck reversing valve. You can try tapping on it lightly to free it, but in my experience, a stuck reversing valve means a new upper A/C unit.

BTW, your model # is located on the base pan of the unit and is visible once you remove the shroud, or it also might be visible if you remove the filter assembly inside the trailer underneath the unit. IIRC, it might be 630516.331.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 04-07-2011, 06:41 AM   #10
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally Posted by Jammer View Post
Lewster is correct.

Another piece of evidence that whoever designed the controls for the Dometic heat pumps spent their whole life inside a skinner box.
Here's Terry's Cheap Shot of the Day:
It's a Swedish air conditioner, made in America, by foreign nationals, with Chinese parts. What could possibly go wrong?
Up until yesterday, I had a couple of those heat pumps laying out back. If they're still there today, I'll take a photo of the solenoid and post it here so you'll know what you're looking for.
__________________
overlander63 is offline   Reply With Quote
Old 04-07-2011, 08:44 AM   #11
Rivet Master
 
RichHog's Avatar
 
2006 25' Safari FB SE
1972 25' Tradewind
Houston , Texas
Join Date: Feb 2009
Posts: 1,142
Images: 7
Thanks for your help. Tried Zigs idea and set to high fan and cranked down stat, could hear the compressor kick in but after 5 minutes things got hot. Yes a photo would help. Don't have any tools or ladder here but a friend is coming over tonight so may motivate him to bring some stuff. There's a CW nearby may call them and check on part.
__________________
RichHog is offline   Reply With Quote
Old 04-07-2011, 01:21 PM   #12
Rivet Master
 
Westfalia's Avatar
 
2008 27' International CCD FB
Boerne, TX / , Evergreen, CO
Join Date: Jun 2005
Posts: 904
Images: 35
Send a message via AIM to Westfalia Send a message via Skype™ to Westfalia
Rich, sorry to hear about the A/C Probs. If it turns out that your A/C is shot and you are upgrading to a 13.5K unit, send me a PM. I may be interested in moving up to a 15K unit on our trailer and could make you a good price on my existing unit. Of course, if can convince Lewster to mozy on up to Texas to help us make the swap . . .
__________________
Chris and Christina- Boerne, TX / Evergreen, CO - TAC TX-7
2008 27'FB Int'l Signature CCD
Westfalia is offline   Reply With Quote
Old 04-07-2011, 03:02 PM   #13
4 Rivet Member
 
fmrcaptevil's Avatar
 
Currently Looking...
Weldon Spring , Missouri
Join Date: Jul 2009
Posts: 456
Anyone know why my duotherm trips its c/b after a few hours of heat pump operation?
(a/c mode OK)
__________________
fmrcaptevil is offline   Reply With Quote
Old 04-07-2011, 03:20 PM   #14
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,282
Quote:
Originally Posted by Westfalia View Post
Rich, sorry to hear about the A/C Probs. If it turns out that your A/C is shot and you are upgrading to a 13.5K unit, send me a PM. I may be interested in moving up to a 15K unit on our trailer and could make you a good price on my existing unit. Of course, if can convince Lewster to mozy on up to Texas to help us make the swap . . .
Hitting the road around June 1. First stop is ABQ for the Restoration Rally.......unless I need to make a detour.
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Armstrong VCT - Any gluing issues with Cold? robwok Floor Finishes 4 08-08-2013 12:49 PM
Hot Water from Cold Valve txhippiefish Fresh Water Systems 26 04-03-2011 12:05 PM
SoCal dilemma: Desert Hot Springs, Borrego Springs or Temecula? Stella On The Road... 5 03-13-2011 05:59 PM
Furnace and Hot water heater complete Airdaddy Furnaces, Heaters, Fireplaces & Air Conditioning 3 02-02-2011 10:16 PM
Hot shell on 2006 International hapnlin Electrical - Systems, Generators, Batteries & Solar 1 01-25-2011 08:19 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:09 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.