Question about Fujitsu "AOU12RLS 12,000 BTU Cool/16,000 BTU Heat Halcyon Ductless Mi"

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AOU12RLS outside unit is knocking or ticking? Any idea what it might be? Nothing appears to be in fan after taking cover off to examine.

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Need to check and make sure the condensing fan ( outdoor unit fan) wires are not hitting the fan blade, it could also be that the fan blade needs to be balanced.

Posted on Oct 22, 2013

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Thanks for choosing FixYa and welcome. That is possible. More then likely, it is a associated with the valve lifter. If it was a rod, you would hear a knocking sound compared to the ticking sounds a bad lifter gives off. As far as which lifter it is, the only way to know for sure if by taking off the valve cover and examining the lifters. You are in the right area though. Check your lifters and you should fine what is causing the ticking. Put all your focus on that area. Your friend sounds like he knows what he is talking about so he may be able to help you work on it if you are not able.

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This question is really to broad to answer. There are several things that could cause it to stop running. I think I would turn everything off, let it cool down for several hours and try it again. When you kick it back on, take note of what is running and what's not running. Inside fan, outside fan, compressor. If the outside unit will not run at all it could be as simple as a grasshopper caught in the contacts. If you hear the compressor running outside but no outside fan, The fan motor probably needs replaced. Please make sure that all power to the unit is TURNED OFF before removing cover plates on outside unit and before trying to remove insects from contact points. Check all wiring inside outside unit while it is open. Also check capacitors for swelling or leaking. If you don't know how to turn all the power off or open the outside unit, you need to call a professional AC technician. Hope this helps. kstfas

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