My new to me Town Car's a/c never worked, so after changing the rotted out accumulator and having the system vacuumed and recharged, it's finally working - but - it's short cycling - the compressor will run for about 10 seconds, then shut off for about 10 seconds, then back on. the a/c does blow cold when the compressor is engaged, but I measured 66*F vent temp with outside temp of 80F - so they a/c is weak, but perhaps it's because the compressor's only running 50% of the time.
I had the shop re-check the charge yesterday, and it was low, so they vacuumed it and recharged it again and found a very small leak on the suction line leaving the accumulator (where the rubber hose is crimped into the fitting). In about a month it's lost about a pound of refrigerant.
Anyways, the a/c still behaves the same, even immediately after a full charge.
IIRC when the gauges were hooked up after recharging, the low side was between 40-60 and the high side 150-170 - ambient temp was about 75f, a/c was on max with windows open.
From what I've read, the high side seems low and the low side seems a bit high.
I took some temp measurements tonight with my IR gun:
again, AC on max, windows down, ambient temp of 80F
At evap lines:
Suction - 73F
Liquid - 103F - in front of orifice
Liquid - 76F at rear of orifice (cabin side)
Accumulator temp: 66F
Center vent temp: 65F
Obviously I'll eventually have to replace the leaky hose, but what could be causing the low reading on the high side? Clogged orifice? Bad compressor? The condenser fins are clean and clear of debris. Car only has 95000km's (60000 miles~)
a/c systems are kind of foreign to me, hopefully someone can point me in the right direction
I had the shop re-check the charge yesterday, and it was low, so they vacuumed it and recharged it again and found a very small leak on the suction line leaving the accumulator (where the rubber hose is crimped into the fitting). In about a month it's lost about a pound of refrigerant.
Anyways, the a/c still behaves the same, even immediately after a full charge.
IIRC when the gauges were hooked up after recharging, the low side was between 40-60 and the high side 150-170 - ambient temp was about 75f, a/c was on max with windows open.
From what I've read, the high side seems low and the low side seems a bit high.
I took some temp measurements tonight with my IR gun:
again, AC on max, windows down, ambient temp of 80F
At evap lines:
Suction - 73F
Liquid - 103F - in front of orifice
Liquid - 76F at rear of orifice (cabin side)
Accumulator temp: 66F
Center vent temp: 65F
Obviously I'll eventually have to replace the leaky hose, but what could be causing the low reading on the high side? Clogged orifice? Bad compressor? The condenser fins are clean and clear of debris. Car only has 95000km's (60000 miles~)
a/c systems are kind of foreign to me, hopefully someone can point me in the right direction
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