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Evap Failure Rate With And Without Cabin Filter?


mbsl98

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There is a lot of comment to the effect that the cabin air filter is a "big" help in reducing evaporator failure. Is this really borne out by a reduced failure rate in the 70's as they reach the same age as when the 850's fail? It seems to me that there are a lot of 70 owners on here that report failures.

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As far as I know, all 70 series came factory fitted with the filter. Yeah, a leaking evaporator does happen in the 70 series, but not anywhere near as much as in the 850s. I think the main reason the evap. fails is due to moisture. IMO if you turn the A/C compressor off and run the blower fan for a few minutes before you reach your destination, this is the best way to prolong the evap. Most of the newer Volvos even have a feature that runs the fan for a few minutes when the car is off to dry out the evap.

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Without the filter, gunk gets in there...this allows moisture to accumulate at the bottom of the fan housing...a sure and quicker way to rust out the evap. Therefore, it's a good idea to spend the $35 at www.fcpgroton.com and buy the retro kit for the filter for 850's without them.

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