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Old 08-10-2022, 12:17 PM   #1
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Tradewinds AC

Hi Guy's, I have a 1999 Tradewinds wth 2 Dometic Duo-Therm roof top ac units. I can not find a model number and I am trying to identify the capicitors that run it. What I believe is the start/run capacitor is 3100236.169, superceded by 3100236235. I am trying to identify the other capacitor which is very close to it but it does not have any markings. Unfortunately Dick Berry the Tradewinds Guru is no longer with us and I was hoping someone else out there may be able to help.
I got back to my RV this evening and it was over 100. I have repaired the 2 main capacitors and it is all working but I need to source all 4.
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Old 08-11-2022, 12:46 AM   #2
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Does the capacitor have two or three terminals. Can you read the voltage rating and mfd or uf rating. If you can just order one that is the same style, voltage, and mfd or uf rating.
https://www.tedss.com/LearnMore/Moto...Run-Capacitors
https://www.grainger.com/category/mo...ategoryIndex=2
https://www.grainger.com/category/mo...art-capacitors
Don't know if that will help since your in the UK.
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Old 08-12-2022, 12:10 PM   #3
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Tradewinds AC

Hi, thank you for taking the time to get back to me, the information provided is very usefull. To aswer your question is I am enclosing an image of the ones I repaired. The other image shows a 3 terminal capacitor alongside it which is approximately 3" tall and 2" diameter and without any markings. Is there a way to guess which capacitor it is likely to be ?
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Old 08-12-2022, 10:48 PM   #4
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I found this that matches your start capacitor mfd and voltage.
https://www.dyersonline.com/dometic-...7-56-250v.html
The model number of the unit is above the filter and control panel for the temperature control. You make need to move the control panel to see the sticker the number is on. If I can remember I'll look at my units, I have the return air covers off so will be easy to see the numbers. Capacitors hold a charge when power is off. Before touching the terminals with the power off shart across the terminals to discharge the capacitor.
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Old 08-13-2022, 01:59 PM   #5
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Tradewinds AC

Hi, thanks for the input. Unfortunately Dyers do not ship Internationally but I may be able to work around that and it would be good to identify the other capacitor and source from one supplier. You mentioned where I might be able to find the AC model number, could you please be more explicit. I appreciate your comments about the capacitors being charged. In my efforts to photograph and measure the other capacitor left the ac on due tothe heat and using a steel rule to measure the diameter I gave myself a shot of 110 volts, lucky it was'nt the 240 volts we normally use here. I looked up your location, is it near Redding ? Regards, Graham.
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Old 08-13-2022, 02:42 PM   #6
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Actually I'm in Southern California, Redding is in Northern California. Let see if I can get a picture of the model number on my AC. Since we're the same year the units should be similar. The capacitors should be available from another supplier, Dyer was the first one I seen in the search.
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Old 08-13-2022, 06:14 PM   #7
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Got information for you, probably more then you need.
The air conditioner pleumn picture is where the model and serial numbers are located. The original owners, we're second owners, were good about writing down model and serial numbers of some of the appliances.
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Old 08-14-2022, 06:07 AM   #8
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Tradewinds AC

I wondered about your location, so there is more tha one Horse Town. I spent quite a lot of time in California, I had friends up in Redding and friends in Carlsbad and La Jolla. A picture and model number would be great.
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Old 08-14-2022, 08:33 AM   #9
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Dyer on line show the dual run capacitor is a 30-5 mfd 370 volts for the models 57915.422 and 57915.622. They don't list the model 57915.522 I would assume it would use the same rated capacitor.
https://www.dyersonline.com/dometic-...-30-5-mfd.html
Grainger shows they have the dual run capacitor with the correct rating. Grainger is an international company so they may ship to the UK.
https://www.grainger.com/product/DAY...or-Round-2MEE8
Couldn't find an exact match for start capacitor on Grainger's website.
https://www.grainger.com/category/mo...veElement=true
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Old 08-14-2022, 02:00 PM   #10
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Tradewinds AC

Hi, I really appreciate your efforts but the only sticker I can find is enclosed in the image.The information you have supplied has been great. It appears that the only way I can match up the other capacitor is to find a way to get my exact model number. I have spent hours searching using the information you provided but the results have been inconclusive, thanks again, regards, Graham.
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Old 08-14-2022, 11:35 PM   #11
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Your picture is the control panel/box for the temperature control. The label your looking for is above it not easy to see. You need to remove the one screw holding the control so it can moved out of your way. In one of my pictures you can just barely see the label. The last picture I included in post #7 the label can be seen and the word THERM if you enlarge the picture. That label has the model and serial numbers on it.
Your model number should be the same as mine.
Both of the A/C's have the temperature control panels. Front is the master rear is the slave they are connected together with what look like a phone cord.
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Old 08-15-2022, 12:58 PM   #12
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Tradewinds AC

I have removed both control panels but no stickers above or nearby. I guess from your model number that you have Brisk Air units which I am sure mine are not. I think they are Penguin but maybe I need to find a Tradewinds owner with a 2000 model and try to guess what I may have. I really appreciate the time and effort you have putin to help me, thank you, Graham.
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Old 08-16-2022, 09:38 PM   #13
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Take my advice. Replace all the capacitors. Save yourself trouble down the road. I had to overnight one in for my bay AC unit. Installed it right after work. AC unit is back online.
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