Yesterday I called the Furnace Contractor and reported Code 32 error/issue.
The technician did all the necessary tests, and concluded the error code must be due to the "Fan side port" clogged/plugged due to "oxidized" scaling. (it seems this is a very common problem with this type of furnace)
He pulled out the rubber tubing from the "switch side" and "sucked hard" at the tubing end, with the other end still connected to the port on the fan side. He did that, just for me, to confirm that the port is plugged.
I showed him what I tried to do with a paper clip, to dislodge the scaling. It seems my paper clip was not strong enough and sharp enough. For fear of causing inadvertent damage, I did not want to force it either.
He pulled out a short strand of 12-gauge electrical wire, stripped about 1 inch of insulation at on end, and then inserted the "strong/stiff" copper wire through the port, with force (I guess). The blockage got cleared in no time.
From there on, everything worked worked okay. He showed me how to remove the flame sensor, clean it lightly with fine sand paper and put it back.
My sincere thanks to all the folks (DOC, Houston, turnermech) that helped as well as Mr. Nathan who introduced me to DIY forum.
Not sure what tester you are referring to, usually if there is a code it is in the form of a flashing light that correspond to a legend that has the code descriptions usually located on the inside of the blower compartment. Otherwise if your manual is not there (it should have been left with the furnace) You can download it from Carriers website.
All these years (9 years since I purchased the furnace) I got the furnace serviced and repairs (if any) done by the Contractor, on 10-year warranty (parts and labor). As a result, until I joined this DIY forum, I never knew anything about the "Code" derived from the "blinking" LED light.
Now I know, as I am getting used to the "internal workings" of the furnace, because my warranty will run out next October (2013).
Thanks for your help, and sorry for the confusion about "Tester"