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re your comment, "...Your 1993 240 should include the electric pusher fan mounted directly in front of the A/C condenser. Does it come on when you have the A/C on or as the engine warms?..."
Actually, that electric auxiliary fan, at least in '92 and '93 models, has no relationship to engine coolant temperature, a common mistake; and shouldn't normally come on when you turn on the A/C.
It is activated solely by a pressoswitch in the A/C system (on the '93, it's located on a branch line beside a side rail beneath the lower radiator hose), and meant to turn on only in conditions of very high A/C pressures -- in effect, only on a very hot summer day when you're crawling in bumper-to-bumper going-to-the-crowded beach kind of traffic. Normally (even in the summer), that fan will not turn on when you switch on the A/C -- if you find that your fan does, you've got the wrong amount of refrigerant, or some other A/C system problem.
However, if you're a Volvo Club of America member and get their publication Rolling, you might remember my article in which I wrote how (if you have the Nissen aftermarket 3-row radiator with the unused thermoswitch) to install an inexpensive Volvo TSB-issued cable to make the fan dual-purpose, thus turning on either if A/C line pressures are too high or else if the coolant temperature is too high. My article was published in Rolling's July/August 2007 issue: Vol 25, Issue 4, page 25.
Best regards,
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