Gulf Stream Owners RV Forum

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Old 02-03-2015, 02:40 PM   #1
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Location: St. Pete Beach
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Default Duo Therm Roof Air Units

HI folks, just a bit of information that could save you time and money. Recently lost my fan motor on the front AC unit. Duo Therm Penguin, 13,5000 ducted.
I figured..oh we being sucked out of the wallet. I talked to one rv repair guy, said the unit would probably need to be replaced. I dont' think so. The compressor was working great, VERY cold air,,,not a lot of hours on these units. So, I had my house ac guys (who I tip generously) discuss looking at it. We met, took the shroud off, and on the right side, midway back, there is a door, screwed on with two bolts. Opened it up...and found the culprit.

On that last trip, we put the front air on, for the DOG of course!) and left. Came back and found it warm, and an electrical burning type smell. I noticed the fan wasn't working....took the trim panel off inside, and I could start the fan, and it would spin, slowly....

so the AC guys (don't ya love how I have drifted all over on this?) looked in that little compartment, and there was a device called a Hard Start, and a Cream colored capacitor. This capacitor is a dual Capacitor. One side goes to the Fan motor, one side goes to the Compressor, and I think one went over to that hard start part.

We pulled the Cap out, and one side of it was burned right open. Thus, my stinky smell inside the coach. They also said, that if this goes bad, it won't start properly, and also will pull voltage away from the fan motor. So, they ordered a new one. We did both of them, front and back. All is working GREAT now. Everything back together and ready to go. If you have a fan problem (has happened before) first thing I would check is this Capacitor. I see you can get them from Dyers Rv, they had specs and all there, sent me diagrams and schematics.

Easy Peasy fix....I was in a panic, bad fan...which would have been a huge job getting the old one out!!!! All is well in Gulfstream land now...the sucking sound you now hear is from my wallet, replaced my house batteries, New T105 Trojans. These babies are good. Later all..R
Ray A. Harkness
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Old 06-18-2017, 07:56 PM   #2
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Default Hopefully this answers my question.

Could it also work in reverse? Could the capacitor burn out on the compressor side and not the fan side? My front unit will come on stay on for approx 10 minutes then the compressor gets really noisy and the air feels restricted then it shuts off and the air speed picks up. This will go on for a couple of cycles then pop the circuit breaker. It is a very new issue like in the last couple of days.

Please let it be that easy!!!!! 🤞🏼

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Old 07-08-2017, 04:51 PM   #3
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I wonder how many people you just saved an armload of cash for! Pool motors are much the same way - the pool company wants to sell you a whole unit and forget diagnosis.
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