AC Evaporator Freezing Up.
#21
Not really how mine is.
On mine the blower will completely shut off. When I first started looking into it I noticed that when the blower stops the ac line under the hood is frosted over. I can shut the ac off for just a few minutes until that frost goes away and then turn it back on and it will blow cold. It never does start blowing hot/warm.
Even if I leave blower control on high it will automatically come back on and blow vent (ambient temp) air when the frost thaws. Then I hit the ac button and it blows cold.
On mine the blower will completely shut off. When I first started looking into it I noticed that when the blower stops the ac line under the hood is frosted over. I can shut the ac off for just a few minutes until that frost goes away and then turn it back on and it will blow cold. It never does start blowing hot/warm.
Even if I leave blower control on high it will automatically come back on and blow vent (ambient temp) air when the frost thaws. Then I hit the ac button and it blows cold.
#23
#24
Some other posts have suggested .8mm is when the AC clutch goes wonky - or about .333 inches where the desired spec is .4mm. You should be able to take off the drive belt and remove the center bolt to take the clutch off - I think there's a write up on either the S40 or 850 board... I have an old compressor from an 850 in my garage and can take a look at the clutch bolt and snap a pic after I remove it if that would help. when you take the clutch off you should find the shims. if there's more than one, just remove the extra until you get close to .012ish. I recall one comment where they ground down the remaining shim to get the gap in spec. You can try searching ebay etc to see if replacement clutches are available but the shim fix should be $0 parts/ your time invested.
#25
All things considered, mine was super easy. Up on a jack stand, right front wheel removed, wheel liner removed, compressor clutch exposed. Do not remove belt. Remove small center bolt on comp clutch. On mine the clutch face pulled free easily. The 3 shims were still stuck inside the clutch face as it pulled free. Just be careful you don't drop them or if you do, make sure to catch them. Each shim is a different thickness so choose the one to remove that will bring the clutch face closer to the clutch by the needed amount. I removed the thickest one and left the 2 thinnest. Put it back together the opposite how you took it apart and then test.
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