cooling fan switch

Have a possible coolant leak, where it screws into thermostat housing. need help on how to chage it.

Have a possible coolant leak, where it screws into thermostat housing. need help on how to chage it.
Welcome to the forum!

You didn't mention what year your van is, but the following page may help:

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/f5/e8/0900823d801bf5e8.jsp

Please let us know what you discover.

Take Care,