cooling fans running

ehgvette · 07-19-2016, 12:37 PM

My cooling fans have turning on in the garage in the middle of the night. Please let me know any tests for the sensors and relay.

Thanks,

The Glademister · The Glademister's Garage

Cooling Fan Operation and Troubleshooting

sjv · 07-19-2016, 03:25 PM

I to had that problem I removed the fan relay removed the cover and found the relay points making contact needle nosed them apart never a problem sense .Pulling that relay to keep my battery from dying lead me there / did buy a used relay new costs are very high good luck

mytrplseven · mytrplseven's Garage

The most common source of this problem is the radiator temp switch. It bit me at Disneyworld when the battery went dead middle of the night. As soon as the aide jumped me, the fan came on. That's only supposed to happen as a backup for higher than normal coolant temps.

ernie9944 · ernie9944's Garage

Been there with my 968 ....cooling fan relay was the problem.

ehgvette · 07-20-2016, 07:37 AM

Thanks to all. I wouldn't be able to keep the 944 without all the help I receive from you guys.

Kudos

dgcantrell · dgcantrell's Garage

Before messing with the relay, check the temp sensor in the radiator just below the hose on the right side. That is the first thing on the trouble shooting list to check. Disconnect it and if the fans stop running, you've found the issue. They are about $30 and about an hour of work to change out. You have to drain the coolant. Also use a socket to remove the sensor. When installing the new one, be SURE to start it in by hand to make sure it's not cross threaded when you start to tighten it with the socket. Much cussing, wailing, and gnashing of teeth will ensue if you screw up the threads in the radiator reservoir.

Dropping the fans, removing the upper radiator hose, and removing the air box gives MUCH better access to allow you really SEE what you're doing.

Rasta Monsta · Rasta Monsta's Garage

When my car did this it was the AC relay.