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It sounds like everything may be normal. You don't state if the AC blows cold air or not, this is the determine factor I guess you could say. The switch you jumped that made the fans come on low speed is the high pressure switch. One of it's jobs is to turn on the low speed fan if the pressure is high enough. The fact the low speed fan may or may not indicate a problem, one possibility is a bad switch (high pressure switch) or the pressure simply may not be getting high enough to activate the fan. The low speed fan does not automatically come on just because the AC is operating. The determining factor on if further diagnosis is needed is if the AC is cold enough for you or not.
Gilly
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