Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 11-14-2008, 08:18 AM   #1
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
Hello all, I'm having trouble with both of our AC/HP units. We are taking the MH in today for work on these 2 units, but wanted to put a question out here to maybe help point the tech in the right direction. We have had the rear unit replaced about a year ago under warranty with a new unit (original had a coolant leak, or so I was told). The front unit was fine until a couple of weeks ago. The rear unit has acted different since we started using the AC this spring (3-4 months after replacement). When the rear unit would start (in AC mode), OCCASIONALLY we would hear the fan start and hear the compressor try to start but would not "kick in" and then would cycle off. A few moments later the whole cycle would start again sometimes with the AC starting correctly and cooling, sometimes not. Eventually, the air would work properly and cool correctly. The front unit has started doing the same thing in the heat pump mode (haven't seen it happen in AC mode, but the weather cooled quickly here). Additionally, the 2 year warranty period will run out this next January 3rd. Do you think that the best resolution will be to see if the 2 units need to be replaced or just repaired? Or, do you think that the temperature/humidity could have been such that the thermostat has malfunctioned?


Thanks, Dan
__________________

__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 11-14-2008, 08:18 AM   #2
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
Hello all, I'm having trouble with both of our AC/HP units. We are taking the MH in today for work on these 2 units, but wanted to put a question out here to maybe help point the tech in the right direction. We have had the rear unit replaced about a year ago under warranty with a new unit (original had a coolant leak, or so I was told). The front unit was fine until a couple of weeks ago. The rear unit has acted different since we started using the AC this spring (3-4 months after replacement). When the rear unit would start (in AC mode), OCCASIONALLY we would hear the fan start and hear the compressor try to start but would not "kick in" and then would cycle off. A few moments later the whole cycle would start again sometimes with the AC starting correctly and cooling, sometimes not. Eventually, the air would work properly and cool correctly. The front unit has started doing the same thing in the heat pump mode (haven't seen it happen in AC mode, but the weather cooled quickly here). Additionally, the 2 year warranty period will run out this next January 3rd. Do you think that the best resolution will be to see if the 2 units need to be replaced or just repaired? Or, do you think that the temperature/humidity could have been such that the thermostat has malfunctioned?


Thanks, Dan
__________________

__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Old 11-14-2008, 10:28 AM   #3
Senior Member
 
Corvette Man's Avatar
 
Monaco Owners Club
Join Date: Jul 2006
Location: Charlotte, NC
Posts: 202
It could be the reostat which is a little black round thing on top of the roof unit. If it is bad you will see the black tar like substance comming out of it. There was a lot of talk on the Monaco forum 6-8 months ago. You might want to search for the link. Hope this helps. Monaco had a bunch of these over the last several years.
__________________
Corvette Man is offline   Reply With Quote
Old 11-14-2008, 11:45 AM   #4
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
Thanks, Man I'll check it out sounds like my problem
__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Old 11-15-2008, 01:24 AM   #5
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
dwhee,
the repair shop will have probably found the compressor motor starter and/or the start capacitors were bad and replaced them. Let us know what the fix was.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 11-15-2008, 04:04 AM   #6
Senior Member
 
dmsatori's Avatar
 
Join Date: Oct 2008
Location: florida
Posts: 129
I had a similar problem (short cycling) I had one ac that did it from the day I got it. After two years of complaining at the factory, I finally got someone to listen.There was two of us there at the same time with the same problem.They got dometic to replace them. I later heard they were having more units with this problem. I never used the heat pump that much, so I don't know if did it there also. A dometic engineer tried moving the sensor to different locations,there authorised service did the same thing too. I always ended up with the same intermittent problem. hope this helps Dave
__________________
dmsatori is offline   Reply With Quote
Old 11-19-2008, 05:32 PM   #7
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
A quick followup, the tech. was unable to get either unit to malfunction under normal circumstances. The only thing that he found was that the EMS was working properly in shifting power to the proper appliance when on 30 amp setting. Problem was that we were connected to 50 amp service. He stated that there must have been a voltage drop when I noticed the cycling?? Any ideas guys?
Thanks Dan
__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Old 11-19-2008, 11:03 PM   #8
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
Low voltage will definitely cause a problem. Did he test the capacitance of the start capacitor? He should have, just to be sure it is not marginal. Most techs do not have a tester but I have used mine for many years and find issues when others cannot. If it happens again find out the voltage under load.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 11-20-2008, 03:53 AM   #9
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
Thanks Wiz, I don't know what tests were done. What should the voltage under load be?
Dan
__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Old 11-21-2008, 01:22 AM   #10
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
107 volts under load is about as low a voltage you want to put your fan motors and compressors through. Do you have a Surge Guard? I highly recommend them for all your electrical protection.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 11-21-2008, 04:18 AM   #11
Member
 
dwhee's Avatar
 
Monaco Owners Club
Join Date: Feb 2007
Posts: 55
Thanks again Wiz, Yes I have a progressive industries hardwired 50 amp surge protector. I'll check to see if the voltage was at least 107 volts. I'm supposed to pick the rig up today hope that the voltage fluctuation was all that occurred.
Thanks again Dan
__________________
Dan & Kathy

2006 Monaco Knight 40DFD
dwhee is offline   Reply With Quote
Old 11-21-2008, 04:54 AM   #12
Moderator Emeritus
 
TXiceman's Avatar


 
Vintage RV Owners Club
Texas Boomers Club
Oklahoma Boomers Club
Ford Super Duty Owner
Join Date: Aug 2000
Location: Full Time, TX Home Base
Posts: 17,150
Blog Entries: 21
Appliances are supposed to operate on 120 volts + or - 10%...0r 108 volts to 132 volts.

What happens on low voltage is the amp draw goes up which is putting more heat into the motor winds which will break-down (deterioate)the winding insulation.
__________________

__________________
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot
TXiceman 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
Duo Therm A/C Problem jsd3024 RV Systems & Appliances 5 07-02-2006 02:47 AM
Duo-Therm thermostat problem/question Ned MH-General Discussions & Problems 7 01-28-2005 02:09 PM
Duo-Therm themostat problem/question Ned RV Systems & Appliances 4 01-25-2005 04:18 PM
Duo-Therm thermosat problem/question Ned 5th Wheel Discussion 2 01-24-2005 08:26 PM
Duo-Therm AC/Heatpump problem Question RV Systems & Appliances 11 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:19 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.