Dometic A/C run/start cap

T

thomas phipps

New member
Dec 29, 2005
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Anyone know the electrical specs on this goodie. A/C just hums now. Research indicates bad run/start cap. Need to replace it, so A/C will sing the
song of cold air. Dometic Penguin II, 13.5.
Tom
--
2012 Phoenix Cruiser model 2552
KA4CSG
 
Specs of motor capacitors are "usually" printed on the case.

D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com

________________________________
From: Gmclist on behalf of Thomas Phipps
Sent: Wednesday, February 28, 2018 11:06
To: gmclist
Subject: [GMCnet] Dometic A/C run/start cap

Anyone know the electrical specs on this goodie. A/C just hums now. Research indicates bad run/start cap. Need to replace it, so A/C will sing the song of cold air. Dometic Penguin II, 13.5.
Tom
--
2012 Phoenix Cruiser model 2552
KA4CSG
 
Tom,
You can get the capacitor at most RV supply stores in the Phoenix area or you can find them online. Look at the spec plate to identify your needs.

See the following:
https://www.youtube.com/watch?v=Ty_ou_TW5EM
and
https://www.youtube.com/watch?v=kdFIARakavk

J.R. Wright
GMC GreatLakerTech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan

>
> Anyone know the electrical specs on this goodie. A/C just hums now. Research indicates bad run/start cap. Need to replace it, so A/C will sing the
> song of cold air. Dometic Penguin II, 13.5.
> Tom
> --
> 2012 Phoenix Cruiser model 2552
> KA4CSG
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Ought also to be available from abny of the net supply houses. Google by capacity and voltage and see what you get.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
 
Last edited by a moderator:
The origional capacitor has the values printed on it, remove and take it to
a rv repaire shop and get one.

On Wed, Feb 28, 2018 at 10:21 AM, Johnny Bridges via Gmclist <

> Ought also to be available from abny of the net supply houses. Google by capacity and voltage and see what you get.
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
Last edited by a moderator:
Temporary report.
Dometic part #3311883.000 is the hard start kit for Penguin models; 600xxx, 620xxx, 630xxx. The cap in the kit is 43 - 53 uF, 250 vac.
Size is 3 5/16 inch tall and 1 1/2 inch diameter, labeled CD60B. There are other items in the kit, namely a part called a relay. Actually not sure of
it's electrical function. It has only one wire in and one wire out, and the case is isolated from ground.
This did not 'cure' my A/C, but the humm increased in volume. This kit appears to be installed on the 'run' side of the run/start cap.
Awaiting delivery of run/start combination based on one installed in the Penguin II. It's labeled specs are 40/15 uF, 370 vac. Labeled as CBB65a.
This does not appear to be OEM.
I believe "CD60B and CBB65A" are physical package size for the component producers.
Tom

--
2012 Phoenix Cruiser model 2552
KA4CSG
 
If you swap a long for a round, or vice versa, pick up a mount as well = a dollar or two.Hum with a new cap sounds like the motor is siezed or
shorted. Can you spin it? And what does your ohmmeter read when ever thing is disconnected? (Draw a picture)

--johnny

--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
 
And it's likely a time delay relay. But again you can likely chase maker/part number for it.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
 
Final report: Short version, We have a working A/C. Wife very happy.
Details: Replaced the already installed hard start kit with new one. No joy.
Ordered Chinese made new cap, installed same. Joy, Joy, Joy. A/C again.

Installed a 45/5 mfd round capacitor in place of the failed 40/15 mfd capacitor. Cost of the run/start cap was $10 on Amazon, with two day shipping.
The new cap is slightly taller and slimmer than old cap. Easily fit into the space available. Used some shims to allow the original clamp to hold the
new cap steady.

Tom

30 days to leave for Tucson.
--
2012 Phoenix Cruiser model 2552
KA4CSG
 
Weather report for Tucson in April. Not much need for A/C. But, old Boy
Scout motto applies here. Be prepared. Happy wife is happy life. Good job.
Remember that the Dometic roof air has a 2 minute delay relay before
compressor starts. Fan runs when you switch it on, then, the looooong 2
minute wait, then, all hell breaks loose on the roof. Finally, Ahhhh, cool
air.. Compressor does quiet down some with continued use, but can never be
described as silent. Your idea of silent is someone else's idea of either
white noise or infernal racket.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

Final report: Short version, We have a working A/C. Wife very happy.
Details: Replaced the already installed hard start kit with new one. No joy.
Ordered Chinese made new cap, installed same. Joy, Joy, Joy. A/C again.

Installed a 45/5 mfd round capacitor in place of the failed 40/15 mfd
capacitor. Cost of the run/start cap was $10 on Amazon, with two day
shipping.
The new cap is slightly taller and slimmer than old cap. Easily fit into
the space available. Used some shims to allow the original clamp to hold the
new cap steady.

Tom

30 days to leave for Tucson.
--
2012 Phoenix Cruiser model 2552
KA4CSG

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If you replaced a 40/15 capacitor with a 40/5 your fan motor may suffer. The larger 45 mfd is fine for the compressor but the 5 mfd for the fan is a
bit on the short side . If it were me I would add a 10 mfd capacitor in parallel with the 5 or disconnect the 5 mfd wire and place a 15 mfd from
this wire and connect the other wire to the common. If you don't your fan motor will likely over heat when it is running after awhile.
--
Roy Keen
Minden,NV
76 X Glenbrook
 
Not so sure you won't need A/C in Tucson Jim. Had 89 in Phoenix in January, close to the same temps usually. Hal
--
1977 Royale 101348,

1977 Royale 101586, Diesel powered,

1975 Eleganza II, 101230,

1974 Eagle Bus 45',w/slideout,

Rio Rancho, NM
 
Looking forward to some of that. 31° here this morning. High of kind of 48
or 49 today. Ready for some warmer climate. Arches in April looks pretty
good to me.
Jim Hupy
Salem, Or

> Not so sure you won't need A/C in Tucson Jim. Had 89 in Phoenix in
> January, close to the same temps usually. Hal
> --
> 1977 Royale 101348,
>
> 1977 Royale 101586, Diesel powered,
>
> 1975 Eleganza II, 101230,
>
> 1974 Eagle Bus 45',w/slideout,
>
> Rio Rancho, NM
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
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