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Old 08-10-2011, 09:24 PM   #29
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No extension cord is being used,
I will check the temperature.

Andy do you mean to check the temp inside trailer then run air and check temp coming out of vent?
Yes, but both at the same time.

A small probe type thermometer works best if you insert it into the vent outlet of the AC.

Any other type is Ok for the inside of the trailer. Place it where the air from the AC cannot directly blow on it.

Andy
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Old 08-11-2011, 08:52 PM   #30
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Yes, but both at the same time.

A small probe type thermometer works best if you insert it into the vent outlet of the AC.

Any other type is Ok for the inside of the trailer. Place it where the air from the AC cannot directly blow on it.

Andy

My temp diff is around 18 degrees, upon closer investigation it is NOT my compressor that is cutting out, it is my blower fan, it is also very hot to touch, right after starting the AC, is it starting to sound like a bad blower moter?
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Old 08-11-2011, 09:49 PM   #31
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My temp diff is around 18 degrees, upon closer investigation it is NOT my compressor that is cutting out, it is my blower fan, it is also very hot to touch, right after starting the AC, is it starting to sound like a bad blower moter?
Yes indeed.

Andy
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Old 06-18-2012, 09:32 AM   #32
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1972 31' Sovereign
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hey, i have a tr21-12 a/c. do you have the schmatics for it. if so i would like a copy. please tell me you have one.

i would gladly pay for it.

Silvergirl 53
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Old 06-18-2012, 06:45 PM   #33
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hey, i have a tr21-12 a/c. do you have the schmatics for it. if so i would like a copy. please tell me you have one.

i would gladly pay for it.

Silvergirl 53
There is a plate that covers the relays and condensers.

There should be a schematic on the back side of it.

Andy
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Old 06-19-2012, 07:32 AM   #34
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ok Thank you, i should say, i am also looking for a capacitor for it, i finally got an a/c guy out here to check it, he says capacitor is bad, the fan blower works, after the capacitor is put in then he will check the compressor. does anyone know where i can purchase a cover for the a/c?
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Old 06-19-2012, 09:11 AM   #35
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ok Thank you, i should say, i am also looking for a capacitor for it, i finally got an a/c guy out here to check it, he says capacitor is bad, the fan blower works, after the capacitor is put in then he will check the compressor. does anyone know where i can purchase a cover for the a/c?
Which capacitor?

There are two of them.

A fiberglass AC shroud is available.

Andy
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Old 07-30-2012, 09:07 AM   #36
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Looks like I need a new start capacitor and a relay for my Armstrong AC in the '71 Safari. I found a hard start capacitor at Grainger's and other online vendors, but I haven't been able to locate the relay. Does anyone have a link to or a modern part number for the relay at one of the online suppliers?

The Supco SPP6E seems like a good choice for the hard start cap except that it won't fit in the original box that contains the relay and start capacitor. Any suggestions for replacement boxes other than making a new one? I checked Home Depot and Lowes and neither had a viable alternative. Any suggestions?

Thanks!
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Old 08-15-2012, 10:19 AM   #37
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I replaced the original start capacitor with the Supco SPP6E and my AC now works correctly and doesn't trip the overload circuit in my Honda eu3000is generator. The SPP6E is the same size as the original start capacitor so a new box won't be necessary. Win-Win!

I'm also going to replace the run potential relay (original part # 3ARR3 K3S2). I called Grainger's and they recommended 2 modern alternatives from their catalog. Part numbers 1WCC9 and 6X551. I ordered P/N 6X551 as it looks more like the relay in my AC. I'll report back once it has been installed.
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Old 06-28-2016, 04:06 PM   #38
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Reading this 28June16, OAT 96, 70 A/S, original TR21-12, 70F in A/S, in shade.
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Old 06-28-2016, 04:07 PM   #39
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Keeps on ticken----
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Old 06-28-2016, 06:16 PM   #40
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Here's the operating instructions and schematic. Seems like mine used a single capacitor for both the compressor and the fan.

https://www.airstream.com/wp-content...f18e4e4aa2.pdf
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