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cowl motor
Kevin
Suggest you try cleaning the brushes and armature. You can use a form of spray cleaner.
Most likely your mechanic has cleaned the engine and has let gunk down in the motor. suggest you use a baggie to wrap it when washing down the engine compartment.
You also can have a bad connection somewhere. These motors are reliable if adjusted properly.
KEEP THEM CLEAN!
manual mod not recommended (personal opinion) until someone comes back with some positive information.
Lastly, check the current with an ammeter and see if the current draw is uniform over the open and close. If increased current it shows something is binding.
My front motor takes 2-3 x longer and has for past three years. Not a big concern.
Lastly make microswitch adjustments with FULL 28 volts since overrun is critical to life of motor // shouldn't be any.
Remember > Keep them clean! (applies to rest of AC as well)
Bob
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