Posted 11/25/2023 09:48 (#10496202 - in reply to #10496055) Subject: RE: Cat Challenger 55 no heat
w. wi.
Make sure your not a pint low on antifreeze. Our 8970 NH. a few years ago would not heat. there was a little antifreeze in the over flow tank. it will not suck it back in the system . put in about one pint in radiator and then the heater worked good.