Service and Repair, System Maintenance, Advantage...
Answer
Looking to replace a 20 yr old Weil-McLain with a dependable, efficient oil-fired boiler for a...
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Most all swamp coolers have a float valve very much like one in a toilet. Look inside on the bottom and see if one is there. If so, push down on the float and see if water comes in. If not, follow line to see if it may just be turned off from the winter.
Good Luck and let me know.