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Old 07-03-2012, 07:06 PM   #1
2 Rivet Member
1972 25' Tradewind
McKinleyville , California
Join Date: Oct 2009
Posts: 64
HVAC Experts-Please Help

I am taking one last stab at finding a replacement condenser fan motor. I would like to know what the consequence would be for running a replacement motor that is rated for 10 MFD/236V when the blower is rated at 7.5 MFD as well as the run capacitor? Perhaps I would need to replace the blower motor/run capacitor too with a 10 MFD rating? And then that would require a change of the relay? Is there anyway to step down a 10 MFD capacitor to a 7.5 MFD for the blower motor?

This is the problem with trying to maintain an older piece of equipment. Lots of potential motors, but most rated at 208-230V.

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Old 07-03-2012, 07:50 PM   #2
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1974 31' Sovereign
Ottawa , ON
Join Date: May 2008
Posts: 11,169
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Have a look at this thread. That member completely rebuilt his original Armstrong AC unit, and not only upped its output to 15K from the original 13K, but he also turned it into a heat pump as well as an air conditioner.

Well worth the read, and it may make you appreciate that you do actually have a very good unit!
If it's to be, it's up to me.
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