|
|
06-22-2015, 06:29 PM
|
#1
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Help. AC quit putting out cold air.
My Dometic 15K was working fine yesterday. Today is not Putting out cold air. It seems the compressor isn't running. I'm not drawing the amperage I should for the AC running. Could it be a bad start cap? Compressor motor? Or is my compressor probably shot?
I'm in Arizona so I know it isn't coil freeze. Help!!!
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
06-22-2015, 07:09 PM
|
#2
|
3 Rivet Member
2000 23' Safari
Vero Beach
, Florida
Join Date: Jul 2010
Posts: 180
|
Very common for the start capacitor to fry. If you can, go up and sniff around. The capacitors really stink when they fry. Low A/C voltage may be the culprit.
|
|
|
06-22-2015, 07:10 PM
|
#3
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Quote:
Originally Posted by mhilley
Very common for the start capacitor to fry. If you can, go up and sniff around. The capacitors really stink when they fry. Low A/C voltage may be the culprit.
|
Thanks
I'll try that. Will I need a soldering iron to replace it?
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
06-22-2015, 07:16 PM
|
#4
|
Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
|
You can not discount a coil freeze just because you are in AZ. If the unit is low on gas it will freeze. Now that said the compressor would still be running but not under full load so the amps would be lower than normal.
While the amp meter is on the line in the breaker panel and the unit has been off for a while turn the unit on with the thermostat set high. You should see fan current at once. Within a few minuet the compressor should attempt to come on.
If you do not see the compressor come on it could be a bad cap, open compressor winding, or bad control board. Short of hard wiring power right to the unit it is hard to say which. If you do hard wire it both the fan and compressor should start when power is applied. If it does it is the control board. If it does not go for the cap next. For the cost of a cap it may pay to go for that first.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
|
|
|
06-22-2015, 07:21 PM
|
#5
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Ok thanks. The unit was off all day in 90 degree heat so I think I can discount coil freeze. I get 3 amps of draw when the fan kicks on. And only 3 more amps when I hear the compressor motor start. I'll go pick up a cap and a ladder in the morning.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
06-22-2015, 08:27 PM
|
#6
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
If you hear the compressor kick on, then the caps are probably good.
Compressor running, three amps draw, either the compressor has failed or the refrigerant has bled off.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
06-22-2015, 08:36 PM
|
#7
|
Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
|
Quote:
Originally Posted by daveswenson
Ok thanks. The unit was off all day in 90 degree heat so I think I can discount coil freeze. I get 3 amps of draw when the fan kicks on. And only 3 more amps when I hear the compressor motor start. I'll go pick up a cap and a ladder in the morning.
|
Dave,
If your compressor was running, you would see around a 16 amp draw as the fan draws 3 (as you now know) and the compressor RLA, or running load amps is around 13, depending on the outside ambient temperature. The actual values will be printed on the data tag which you will find on the street side rear of the base pan once you remove the shroud.
It sounds like a bad start capacitor. They are located curb side under a metal access panel held on by 2, 5/16" hex screws. The will be in front of and below the relay board. You will probably see a fried PTCR (motor starter, or positive temperature coefficient resistor) and possibly a blown start capacitor too.
If you get a Dometic 'hard start kit', it will contain both, as we generally replace both even if only one is blown. Have fun!
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
|
|
|
06-24-2015, 05:06 PM
|
#8
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Turns out no one stocks the Hard Start Kit or even just capacitors. It's 100 degrees in the trailer now, and we're four days from home. Fun.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
06-24-2015, 05:13 PM
|
#9
|
Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
|
Strange........ I do!
Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
|
|
|
06-24-2015, 06:06 PM
|
#10
|
Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
|
Quote:
Originally Posted by daveswenson
Turns out no one stocks the Hard Start Kit or even just capacitors. It's 100 degrees in the trailer now, and we're four days from home. Fun.
|
Try and find an Electric Motor Repair shop. They can cross the cap and most likely will have it in stock.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
|
|
|
06-26-2015, 09:58 PM
|
#11
|
Rivet Master
2010 27' FB Flying Cloud
Fraser Valley
, British Columbia
Join Date: Jan 2011
Posts: 2,966
|
Sorry, can't offer any help, but sure hope yours gets going again.
We in the PNW aren't used to 100F!
__________________
easily distracted by shiny objects
|
|
|
06-27-2015, 04:53 PM
|
#12
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
So I went to home depot and bought a portable room a/c. It gave me an excuse since I've been wanting one for home.I MacGyvered a cardboard and duct tape insert for the window so I can exhaust the hot air. It does about as good a job as the Dometic with about a third of the noise. The downside is I had to remove the dinette table to find a place for it. So I can eat outside in the heat or with a plate in my lap in the slightly cooler Airstream.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
07-07-2015, 07:20 PM
|
#13
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Update. I installed the hard start kit today. No change. Up on the roof I confirmed that the compressor is running but there is no cooling and only 3 amp draw from the compressor. Makes me think that the refrigerant has leaked out. So the question now is "Can I replace this thing myself, or should I drive to Hood River and have Lew do it?" I think I could probably do it myself if I can get help getting the thing on the roof.
Any ideas?
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
07-07-2015, 08:38 PM
|
#14
|
Napking
2015 30' International
Plymouth
, Minnesota
Join Date: Dec 2014
Posts: 55
|
Ours does exactly the same thing. We are getting the whole unit replaced under warranty. The service tech said he uses a forklift to get it close to the intended whole, then slides it in place.
|
|
|
07-07-2015, 08:38 PM
|
#15
|
Napking
2015 30' International
Plymouth
, Minnesota
Join Date: Dec 2014
Posts: 55
|
Sorry, hole.
|
|
|
07-07-2015, 08:55 PM
|
#16
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
I'm wondering if I should get a different unit, since these seem to be problematic.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
07-07-2015, 09:45 PM
|
#17
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
I don't want to brag on my forty year old Armstrong TOO MUCH because tomorrow is another day....
But it is 66 degrees in my trailer sitting in southern New Mexico right now....
It has been working hard all day every day for well over a month now.
It seems as if they really don't make um like they used to.
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
07-07-2015, 09:51 PM
|
#18
|
Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
|
Quote:
Originally Posted by J. Morgan
I don't want to brag on my forty year old Armstrong TOO MUCH because tomorrow is another day....
But it is 66 degrees in my trailer sitting in southern New Mexico right now....
It has been working hard all day every day for well over a month now.
It seems as if they really don't make um like they used to.
|
They sure don't. It seems like these Chinese made Dometics are not very reliable.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
|
|
|
07-07-2015, 10:05 PM
|
#19
|
Rivet Master
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton
, Arkansas
Join Date: Mar 2013
Posts: 5,868
|
If it weren't for posters on this forum I would have removed and replaced my "old" unit with a "new and reliable" unit
I owe a debt of gratitude to this forum for two years of reliable cooling from my old girl.
It has worked long and hard in these two years, making a comfortable "office" for me even when parked.
I miss the simple reliability of what used to be the mainstay of "made in the USA".
__________________
The fact that I am opinionated does not presuppose that I am wrong......
|
|
|
07-08-2015, 05:15 AM
|
#20
|
Always learning
1972 29' Ambassador
1962 19' Globetrotter
1951 21' Flying Cloud
Central
, Texas
Join Date: Oct 2010
Posts: 2,881
|
Dave,
You might try the RVP Coleman low profile Mach 8. It is a toss up as I think they are also made in China. The Dometics are all made in China. Same thing with the Advent.
Your other option would be to find a scrap trailer with an Armstrong and transplant it on your trailer.
My Armstrong is still running like a champ 43 years later with just a few things needing repairs along the way. Knock on wood.
__________________
Lance
Work is never done, so take time to play!
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|