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Old 05-22-2015, 10:31 AM   #1
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1973 31' Sovereign
Baton Rouge , Louisiana
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Armstrong AC TR21-12

I have a 73 AC 31' with an Armstrong AC TR21-12.
Questions:

Is anyone familiar with this unit?
Anyone serviced this unit or have you replaced the unit?
Is it worth keeping and servicing?
Any feedback or experience with this unit?

Thank you
Burney
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Old 07-07-2015, 02:15 PM   #2
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Kenton , Ohio
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I'm in your boat with an Armstrong that needs repaired. Have you found anybody to fix one?
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Old 07-07-2015, 03:35 PM   #3
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1978 25' Tradewind
Metro Phoenix , Arizona
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The consensus is that it's worth keeping. Mine has a refrigerant leak that I hope to be in the Schraeder valve. We'll see. At any rate, I hope to be able to fix it.
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Old 07-07-2015, 04:24 PM   #4
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I don't have one but I think they're worth keeping for a variety of reasons, among them the cost and complexity of conversion to a newer A/C.

Commercial refrigeration contractors may be best able to repair your unit, though some appliance repair technicians may as well. RV places generally do not have the expertise though there are no doubt exceptions. It may take some calling around and cajoling to find a tech who has the skills and equipment, and the willingness to get up on the roof.

Newer A/C use a 14" square hole in the roof and blow air through the 14" square hole, Armstrong used two smaller holes and ran refrigerant lines through one and a shaft for the fan through the other, placing the evaporator inside the trailer. In general the Armstrong is a solid unit and repair parts including fan motors, compressors, and controls are still available.
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Old 07-23-2015, 12:19 PM   #5
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1971 31' Sovereign
Indian Wells , California
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Quote:
Originally Posted by Jammer View Post

Newer A/C use a 14" square hole in the roof and blow air through the 14" square hole, Armstrong used two smaller holes and ran refrigerant lines through one and a shaft for the fan through the other, placing the evaporator inside the trailer. In general the Armstrong is a solid unit and repair parts including fan motors, compressors, and controls are still available.
I think this is true for the late 60's units but I'm pretty sure my '71 has a 14" square.

My Armstrong is coming out and I'm putting in a new Atwood.
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Old 07-23-2015, 05:22 PM   #6
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Why Atwood vs. another brand? Quality,cost...?
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Old 07-23-2015, 05:28 PM   #7
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Because it supposed to be able to run on one 2000 watt generator
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Old 07-23-2015, 05:29 PM   #8
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Good feature!
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