xspsi6

iTrader: (31)

Only when the a/c is on which taxes the cooling system but the fan only spins on low no matter what so where to start to diag the problem?

i have been searching for the past 2 days to no avl

I would like it to run wide open all of the time as its hot in Florida if there is a way to rig it up to do so?

I am going to swap this one this winter but am driving it daily as of now.

salimshah

https://www.clublexus.com/forums/per...eeping-up.html

That was my problem.

my $0.02 ... if you are moving at a brisk rate the normal air flow is enough to keep the system at operating temp. Fan speed issue come up when you are crawling in traffic.

Do the kick-up in speed test to eliminate the fan speed issue, but look else where for heating issues ... thermostat/hoses/waterpump/air in the system.
If your coolant is disappearing then look for leaks. SC400 has a plastic radiator top and that develops a leak after number of years.

Salim