A/C Pulsing - is this normal?
Posted: Mon Aug 15, 2005 9:00 pm
1993 Legacy Wagon
Symptom:
When the A/C is turned on, the compressor will pulse/release in a regular cycle:
ENGAGED 8 seconds
DISENGAGED 10 seconds
(times are guesstimates based on memory)
Now, I had a rental Ford Focus that would disengage the A/C compressor clutch when you hit the throttle hard or were climbing a hill to favor acceleration. Is this perhaps a SUBARU idea to squeeze out fuel efficiency? It doesn't affect the cooling too much, but it gets COLD then it kind of wanes just a bit... then it gets COLD... then wanes etc.
The system was just converted to R134a from R-12 but it ALWAYS did this even with R-12 at proper charge.
Lemme know!
BTW - the ol' 1993 Legacy Wagon gets 28-30 MPG on the highway -with- the A/C on. =)
Symptom:
When the A/C is turned on, the compressor will pulse/release in a regular cycle:
ENGAGED 8 seconds
DISENGAGED 10 seconds
(times are guesstimates based on memory)
Now, I had a rental Ford Focus that would disengage the A/C compressor clutch when you hit the throttle hard or were climbing a hill to favor acceleration. Is this perhaps a SUBARU idea to squeeze out fuel efficiency? It doesn't affect the cooling too much, but it gets COLD then it kind of wanes just a bit... then it gets COLD... then wanes etc.
The system was just converted to R134a from R-12 but it ALWAYS did this even with R-12 at proper charge.
Lemme know!
BTW - the ol' 1993 Legacy Wagon gets 28-30 MPG on the highway -with- the A/C on. =)