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Old 07-13-2012, 11:26 PM   #15
2 Rivet Member
1972 25' Tradewind
McKinleyville , California
Join Date: Oct 2009
Posts: 64
The condenser motor probably does not have a start capacitor, but will have a run capacitor. It really sounds like your problem is the run capacitor for the condenser motor. I just successfully refurbished my Armstrong TR21-12 by replacing the condenser motor, as well as the run and start capacitors. The start capacitor generally is for the compressor. In my case the run capacitor was a three way, a 30/7.5/7.5 MFD capacitor. The new condenser motor required a 10 MFD, so I replaced the original 30/7.5/7.5 MFD capacitor with a 30/10 MFD capacitor and then ran a separate 7.5 MFD to the blower. The Armstrong runs great now and am glad I did not relegate the Armstrong to the dump.

I think the investment of $30-$40 to get new run capacitors is a worthy investment, so that is where I would start. Oiling the condenser motor bearings/sleeve may be required too in your case. Good luck...

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