Hi all, fairly new to this forum thing so ere goes,

I have a 2006 VZ SS Crewman Thunder (6L), probably no different to any VZ SS as far as driveline go so I'm appealing to all VZ SS owners & those of significant wisdom..... Has anyone experienced problems with the thermo fans where one cuts in/out & the other doesn't (before thinking the obvious....read below)

Very recently I have noticed the engine running a touch hotter than usual (only about two needle widths higher but not overheating due to fairly cool weather) & when in traffic or stopped at lights have also noticed the air conditioning warming up slightly & seems like it can't quite maintain the set temperature, after a little investigation I've found the small thermo fan (passenger side) doesn't cut in at all, with the A/C off, the engine temp climbs, the large fan cuts in, cools the temp down & cuts out, with the A/C on the same happens.

I spoke to my brother (who also owns a VZ SS Crewman) & he checked his car saying both fans kick in after a short delay after turning on the A/C, which would explain my A/C warming up when stopped at lights or in traffic.

Yesterday, while replacing the radiator hoses, thermostat & t'stat hsg/neck as preventative maintenance, I removed the thermo fan assembly & connected it to 12 VDC to find both fans work as required on both the high & low circuits, as I understand it, the ECU reads the temperature from a sensor in the engine & thus controls the thermo fans accordingly, is there any known or common problems where the circuit controlling the fans is compromised or is it a possible ECU fault, my local dealership said "You'll have to bring it in so we can have a look"..........!!!!

Any help would be appeciated,

Regards,

Tim.