SOURCE: ruud heat pump outside fan
You may be right in looking at the motor. It uses a different speed on heat than cool. The heat cycle uses low speed, usually red. Some manufactures use blue (medium). Cool uses black, high speed. If you are confident, switch the low speed wire with the high speed and see if this changes anything. If the fan motor isn't the problem, check the other setting (cool) if the overload trips, you may need to look into a new capacitor or compressor, if so, you can install a hard start kit. these are start boosters, and are inexpensice, sometimes they will give another year out of the comp. but I've put them on and they have lasted 5 years.
SOURCE: we had a lightning storm and now the ac wont work
That is correct also. Down here in Tornado alley, we have lightning strikes all during the summer months, and from experience ,we mostly have tripped breakers and or exploded or swollen capicators or that little silver can. if it looks swollen at the top then it exploded and needs replacing.Also look in the outside disconnect box for blown fuses, oh yes ,the light humming noise comes from the contactor being pulled in by the inside 24volt system from the furnace. Thank-you very-much
SOURCE: Amana 1 ton Residential AC / Outside unit comes on for a sec
open the service panel to check for control voltage of 24volts when tstat calling, The contactor should be pulled in, if contactor is down,and contacts appear to be clean, and the unit is still not running, it is a bad compressor. to test this unplug the black wire from the compressoror at contactor,w/ power off! Turn on power if fan works normally it's a bad compressor. However if you see a swollen split cap(5 wires to a soup can looking w/ the terminal C,F,and Comp), switch it first and start at square one.
You also need to consider the high pressure switch if its cycling on off on off.
SOURCE: Does this unit draw inside outside air in fan mode?
that's usually controled by a baffle inside or outside air
SOURCE: My AC unit wont blow the cold air.
No, you probably have a bad evaporative fan motor, capacitor or switching. It usually takes a Pro 1/2 hour to track down such a problem with good training.
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