Clicking relay

[John Lagnese]

Hi,
I have been having an annoying problem with my 91 200 20V.  Since I've
had the car, when my climate control is set on auto or defrost the
system is fine. If I set it to bilevel or econ the #3 relay starts to
click fairly rapidly. I believe this is the cooling fan delay relay. I
tried a new relay and there was no change. Recently the relay slowly
clicks even on auto or defrost now.
Does anyone have any experience with this or any ideas?
John