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Swamp cooler leaks & creates white residue on the roof (air conditioning, drain)
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Danielkman
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Hello,My swamp cooler often leaks while turned on. Sometimes it won"t.I noticed after a while that there is a white residue left from the water leaking on the roof.any ideas what could be the problem and how I get rid of that white residue?Thanks!Daniel
Change the pads more often. Replace it with air conditioning. Get a water softener - ask at a local hardware store about something to remove the white residue.
Put a scale eliminator in your water line to reduce the hard water deposits. Iused one every cooling season. Make sure you inspect the connections at both ends. After I had one installed, the nut was cracked and caused aleak. Since my swamp was roof mounted, it leaked into a closet in my house. Not a terrible mess, but still not pretty. Use a hose connected to the drain fitting to drain the water off the roof. I ran the other end of my hose into the raingutter.
It"s a calcium build up from your hard water system. Use a water neutralizer and change the pads often.

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Deposits on the roof have nothing to do with pads or hard water. And scale eliminators will do nothing for roof deposits. Roof deposits are caused by either a) a leaky reservoir or b) a malfunctioning float valve.First make sure your float valve isn"t leaking. After the cooler has been off for a while, look at where the water comes out of the valve. It should not be dripping. If it is, replace it.Then check the water level. It should be below the top of the overflow, because when you switch the cooler off, water will drain from the pads into the reservoir and you don"t want it to overflow. If the water level is too high, try bending the float arm down to lower the level. If the float is good, find out where the water is leaking. It may be from the overflow drain, which can be fixed with either a new O-ring, a new gasket, or a new overflow bulkhead. Or it may be leaking from a rust hole or an otherwise compromised reservoir.A swamp cooler in good working condition will dump zero water onto the roof. If you have a bleed or flush kit installed, it should have a hose that can be routed to a gutter.
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