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Old 06-07-2011, 08:37 PM   #43
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Update after first outing

We took Abby on her first trip, post rear half restoration, to the Central Texas Rally this past weekend. The A/C worked fine most of the time. No popped breakers or GFCI problems at all. We were parked under some of the biggest shade trees I have ever seen. As long as the compressor stayed running all the time the trailer was cool inside. It was between 95-100 degrees F the whole weekend.
We did have one small problem one morning when the sun started to heat things up and the thermostat clicked to turn on the compressor. The compressor did not kick on and a few minutes later, my daughter was asking me why it was so hot in the trailer. I went to the thermostat and moved the temp selector to the left (90) then back down until I heard the click for the compressor to turn on. Nothing. Finally after three or four times of moving the temp selector back and forth the compressor kicked in and cold air started blowing again.
Any suggestions or possible causes?
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Old 06-08-2011, 08:22 PM   #44
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Bueller? Bueller? Anyone?
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Old 06-08-2011, 08:33 PM   #45
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My guess is a faulty thermostat. Put a meter on your lines to check continuity and current and if all is good... I'd replace the thermostat and see if that cures your problem.
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Old 06-08-2011, 08:38 PM   #46
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I'll check that out. Thanks.
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Old 08-14-2011, 09:33 PM   #47
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Thanks for the help y'all. I think I've fixed it. These two wires were draped down over the blower motor sitting in a puddle of water. The black rubber boot for the (capacitor? Relay?) Is all torn up and was puddling water where these two wires connect to the componnent.
I cut off the old blade connectors and used two of these $1.10 crimp/solder/heat shrink super connectors I bought at Fastenal. I did my best to seal up the top and sides of the rubber boot. I'll have to keep an eye on it. It seems to be working fine right now.
Thanks guys. Once again the Forum knowledge base comes through!
I am trying to find specs on the blower motor for my Armstrong TR 21-12 I can in your pictures your blower motor is 1560 RPM can you tell me the model and make, I need to replace mine and my tag is illegible.
I tried a blower from Granger 4UU33, but it is too slow RPM and gets very very hot.
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Old 08-15-2011, 04:34 AM   #48
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Originally Posted by loechli View Post
I am trying to find specs on the blower motor for my Armstrong TR 21-12 I can in your pictures your blower motor is 1560 RPM can you tell me the model and make, I need to replace mine and my tag is illegible.
I tried a blower from Granger 4UU33, but it is too slow RPM and gets very very hot.
I'll have a look through my other pics to see if there is a better pic of the data plate. If not, I'll pop the shroud off and take a look when I get a chance.
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Old 08-15-2011, 08:06 AM   #49
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Fasco

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I am trying to find specs on the blower motor for my Armstrong TR 21-12 I can in your pictures your blower motor is 1560 RPM can you tell me the model and make, I need to replace mine and my tag is illegible.
I tried a blower from Granger 4UU33, but it is too slow RPM and gets very very hot.
It is a FASCO type U18481

Hope this helps.
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Old 08-15-2011, 08:17 AM   #50
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Thanks for the quick response, having a hard time finding the motor with part number you gave me, how long has it been on your system is it working well, does the plate on motor list HP or RPM?
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Old 08-15-2011, 08:52 AM   #51
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It is a FASCO type U18481

Hope this helps.

Thanks for the quick response, having a hard time finding the motor with part number you gave me, how long has it been on your system is it working well, does the plate on motor list HP or RPM? I also saw in one of your pictures that you have a 4 speed motor I assume your wall thermostat is like mine with a High and Low, do you know which 2 of the 4 speeds you are using?
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Old 08-15-2011, 11:20 AM   #52
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Quote:
Originally Posted by loechli View Post
Thanks for the quick response, having a hard time finding the motor with part number you gave me, how long has it been on your system is it working well, does the plate on motor list HP or RPM? I also saw in one of your pictures that you have a 4 speed motor I assume your wall thermostat is like mine with a High and Low, do you know which 2 of the 4 speeds you are using?
It was installed in 2003 or 2004 I believe. The blower motor works just fine. It was installed by a PO that is an A/C guy. You can google M&M Refrigeration Buda, TX to contact him. Super guy.

The data plate shows it as a four speed. I don't know which speeds are used.
HP is listed as 1/6-1/8-1/10-1/12
AMP is listed as 3.2-1.7-1.3-1.1
RPM 1550 (4 Speed)
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