03 VS 800 GLPOverheating indicator light on.

The overheating indicator light is on continously, but the radiator fan comes on and seems to work fine. ECT sensor is a difficult job to replace. Any hints?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0