It's on the right side of the engine with an clutch. I think in the service manual it's not always on as stated. I think it's the a/c that runs in most heater settings. I will look it up in the manual when I gea a chance.

_________________
2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair

Ok, I checked this morning when I got to work. The clutch on the heater
thing wasn't activated. Even when I turned the heater dial all the way on.
Turning the A/C on had no effect either.
So now I wonder, under what conditions does it turn on? Does it go by
ambient air or coolant temp?

I'm pretty sure that the A/C compressor is only ON when the button is
pressed. The only exception is when the vent dial is turned to one of the
defrost positions. Kind of annoying. There are times where I would like
air through the defrost vents without the A/C on.

_________________
U.S. Army Retired

There is a mod you can do to disable the A/C in any position. It's not too hard.

I think the viscous heater won't come on at all unless ambient is below a certain temperature, then it's coolant temp based.

Start a new thread on the viscous heater. Someone on this forum does know the full poop on it....they won't find it on this thread. It comes on for defrost, as a supplimental heat, and certain other AC settings. I think it is clutched off otherwise. It is in the manual, also.

I'm too darn lazy to look...got a baby coming in couple of days and nobody is sleeping..

_________________
2005 Liberty Sport CRD w/all the fixings
Elephant Hose, MAF (ORM), Amsoil Airfilter, nice when I get to drive it
1 EGRreplacement, but never again.
99.5 FrankenJetta TDI (R.I.P.): being turned into diesel hybrid!
99.5 Replacement Jetta TDI: deal of a lifetime, EHM, some other stuff