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a/c cycling switch
could the low pressure switch also called a cycling switch...
i just lost my shift key and gained 2 pounds of r-12 and a working a/c system, except for a cycling switch...question.. the shop were i had the system charged at suggested that i install a new cycling swith, they wanted one hundred dollars for it ... is it a low pressure sitch.. i've got to get that shift key working, it's hard to ask questions without that mark.
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1993 w250 Dodge cummins,wvo,tweaked pump,etc 1969 Baja bug, vert, 3x3, mid travel, 1914, fun 1979 300sd not so bad |
#2
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Yes, I believe so. There's two switches on the accumulator or dryer. One is a pressure switch & the other a temp. switch. The cycling or pressure switch will require the charge to be lost though (Don't believe there's a schrader valve below it) It does not cost that much to buy. This is on a W123? or 126?
By the way, your location, by Joshua Tree National Park in Calif? Paul.
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1984 300CD red/blk 290,000 partial resto 1980 240D 4 sp Brn/palomino gone 1997 Mazda Miata STO edition wife's baby 1988 Lincoln Mark VII LSC next resto 1986 Subaru GL wagon daily 1993 Isuzu pickup field beater 2008 Honda Civic EX-L 5sp wife's new car 1978 Honda XL350 1974 Honda XL70 my Calif. ride in HS |
#3
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Quote:
Last edited by tangofox007; 05-03-2006 at 12:37 PM. |
#4
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so... does the low pressure switch have anything to do with cycling the compressor... question.
i don't want to replace the r12 again, it cost me 20 percent of what i have into the car. the a/c temp switch.. could that be the switch the shop was talking about when the said the system gets too cold, does not cycle... question. i've never worked on a a/c system before, i should learn more, i'm in the middle of building myself a house, a full mind. yes, i do live by the park, it borders the land i have, i'll have protected views, well unless they find oil there.
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1993 w250 Dodge cummins,wvo,tweaked pump,etc 1969 Baja bug, vert, 3x3, mid travel, 1914, fun 1979 300sd not so bad |
#5
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Quote:
Your car is not among them. There is no cycling switch in your system. The low-pressure switch is on the high side, and prevents the compressor from starting in the first place if you're low on refridgerant, but it won't cut it off once it starts. The switch that they want to install is a high side cutout switch which turns off the compressor if the high side gets too high, and is required for HFC134a conversions, but not required for R12, and shouldn't be needed. |
#6
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#7
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There are two switches, one for control of the aux fan and the other for low pressure protection to prevent compressor destruction in the event of an empty system. This is not a cycling compressor system.
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