Fan cooling system of an engine v.w

SOURCE: fans run constantly

Irwinr12 is right, no amount of fan will keep the Regal from warming up if the thermostat is working properly, Replace it. Clear SES light with OBDII tool & you should be good to go. BTY its the car computer that keeps the fans running, and they will continue to run until you clear the code. Any kind of cooling/overheating proiblem will kick in the SES light and set both fans running. I own '01 GS, my son has '03 GS and we have both complete set of service manuals. Trust me, do what I say. Batman

SOURCE: 2003 Jag S-type engine cooling fan comes on and stays on

try replacing the fan stat, usually on the rad

SOURCE: cooling relay switch

Relay is in the power distribution center near the battery. does the fan go off when you remove the relay? Relay is turned on by the computer after it receives info from the temp sensor. Why didn't the "guy" order a new relay? Was he a tech in a shop?

SOURCE: engine cooling fan not coming on

It may be the fan itself. Try to find the plug going to the fan, it should be close to the fan and might plug diresctly into the relay. Use two jumper wires straight from the Bat one from the pos+ side and one from the neg- side and plug them into the two holes in the connector the fan should start WATCH YOUR FINGERS. If it starts its elec prob before the fan if not its the fan.

SOURCE: overheating car will shut off after 20 min will run again

maybe replacing the thermostatic fan switch would fix it.