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  1. #1

    Hmm

    I have a 11/2 ton Fedders window unit that is 2 seasons old. Compressor LRA 7.8 Amps, On startup, amprobe reads 4 amps and slowly increases to 10 + amps until overload kicks out. Cap. seems to test OK. PC board has time delay feature. Blows cold when compressor is running but dosent run properly to keep room cool all the time.

  2. #2
    Join Date
    Feb 2004
    Location
    Medford Oregon
    Posts
    807
    from compressor manufacturer get the winding
    resistance specs and check if yours are in spec

    you probably have turn to turn shorts
    (i.e. compressor windings gone)

  3. #3
    Thanks. Ill get on that. Justs seems awful weird that a unit less that 2 years old with no excessive use could blow a compressor that easily. Starts w/ low amps. NO surge @ startup. Then steadily climbs to 10 or so amps while running. Blows cold air when it is running. When its overcast it works a lot better than when its 80 or 90 Degrees plus. Wondering if an overcharge could produce these symptoms also?

  4. #4
    Join Date
    Feb 2004
    Location
    Maine
    Posts
    483
    Originally posted by vandal57_75
    Thanks. Ill get on that. Justs seems awful weird that a unit less that 2 years old with no excessive use could blow a compressor that easily. Starts w/ low amps. NO surge @ startup. Then steadily climbs to 10 or so amps while running. Blows cold air when it is running. When its overcast it works a lot better than when its 80 or 90 Degrees plus. Wondering if an overcharge could produce these symptoms also?
    Why would it be overcharged? These are factory charged unless someone else has added gas to it. Rocket is probably right, sounds like a winding to winding short. Or maybe your condenser is plugged solid, remember to remove the cover and look at the condenser facing the inside of the unit as the air usually enters from the side and then through the fan and out the back. They can look clean as a whistle from the back yet be totally plugged.

  5. #5
    Join Date
    Dec 2004
    Location
    Mid-west
    Posts
    567
    So you have no idea what the pressures and temperatures are and your making a diagnosis solely on amp draws. It could be anything.

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