Airco complaints

[Gerard]

Airco on a '99 Impreza Wagon switches on and off every few miles (
noticable from engine load and slight noise increase/decrease ),
while NOT maintaining pleasant temperature inside) is this normal
operation?
While running idle the AC system produces a very loud humming noise.
Something vibrating near the fan housing.
This can't be good, but happens only with higher outside temps (+75
F..)

The dealer tries to put me off, but I lack AC knowledge to improve his
diagnostic.

Anyone any thoughts?

Thanks, Gerard.

 

[Carl 1 Lucky Texan]

Airco on a '99 Impreza Wagon switches on and off every few miles (
noticable from engine load and slight noise increase/decrease ),
while NOT maintaining pleasant temperature inside) is this normal
operation?
While running idle the AC system produces a very loud humming noise.
Something vibrating near the fan housing.
This can't be good, but happens only with higher outside temps (+75 F..)

The dealer tries to put me off, but I lack AC knowledge to improve his
diagnostic.

Anyone any thoughts?

Thanks, Gerard.

I think I would just start asking trusted neighbors, friends,
church-goers, co workers,etc. about area mechanics good with A/C. That
system is not so different in a Subaru that a competent mechanic can't
work on it.

Carl