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Cycling AC question

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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matthew1
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Year and Model: 850 T5, 1997
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Cycling AC question

Post by matthew1 »

So I don't get to use my AC much here in Seattle, but yesterday I needed it. It's cycling every 5-10 seconds. I can hear a faint click and can feel a bit less power at that time, for just a moment. Air blows cool.

Is this probably a low-coolant situation or probably a leaking evaporator?
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1998 V70, no dash lights on

1997 850 T5 [gone] w/ MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace

2004 V70 R [gone]

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Arfsnarfy
Posts: 19
Joined: 2 July 2004
Year and Model:
Location: Pittsburgh

Post by Arfsnarfy »

Matthew
Sounds like you need some refrigerant added. Usually there is a low pressure switch in the circuit which will shut the compressor down if low on refrigerant. It will cycle on and off just as you describe.
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