Kramer Posted December 5 Share Posted December 5 I drive a 2020 Granite for plow trk for the state and the trk feels like i turned the heat back about 1/3 of the way but only after I drive the trk for a few minutes. When idling, it will cook as supposed to and if empty and on flatland ot stays hotter as well but as soon as I load up and start climbing hills, the defrosters get cooler. If split between feet and defroster, you can actually feel the feet is still hotter than the defroster. Its been to Mack and spent over $5k and still mot fixed after 1 year and of course our mechs just say nothing is wrong with it. I'm about to tell mngmt I want a different trk but I've taken care of this trk for 5 yrs and would like to keep running it. Any ideas cux Mack has done most everything i can think of. Thermostats, heater core, water pump, control module, and found a broken wire at 1 time but still not hot. Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/ Share on other sites More sharing options...
mowerman Posted December 6 Share Posted December 6 that sucks sorry no advice,,,,i had a similar experience with a freightliner cabover years back,,,,mechanics tryed everything and i watched them heater would work great till it got colder than 30 degrees then it would turn cold air,,,i wound up changing trucks,,, Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563413 Share on other sites More sharing options...
70mackMB Posted December 6 Share Posted December 6 Welcome to BMT Kramer l'm sure one of the guys will figure out your problem. This is a truck driving story so it starts off with "This ain't no $hit!" l drove a Transtar 1 with a 318 DD in it OTR and talk about no heat or lack of. Wool hat, insulated under ware, wool socks, insulated vest, full snowmobile suit & gloves, and boots were standard equipment. And we tried everything to get more heat in that cab but couldn't. Back when it was fun! lol .....Hippy 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563422 Share on other sites More sharing options...
mowerman Posted December 6 Share Posted December 6 oh ya forgot about the ford cabover nissens had,,it was the model after the 2 story falcon you could hear the blower down there screeming like a turbo,,,nothing coming out of the vents at all...bob Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563427 Share on other sites More sharing options...
tjc transport Posted December 6 Share Posted December 6 2 hours ago, 70mackMB said: Welcome to BMT Kramer l'm sure one of the guys will figure out your problem. This is a truck driving story so it starts off with "This ain't no $hit!" l drove a Transtar 1 with a 318 DD in it OTR and talk about no heat or lack of. Wool hat, insulated under ware, wool socks, insulated vest, full snowmobile suit & gloves, and boots were standard equipment. And we tried everything to get more heat in that cab but couldn't. Back when it was fun! lol .....Hippy my B815 was like that, and to a degree some of the 70's DM-800's too. great AC in winter, and even better heat in summer!!! i would get in the cab in the summer 5 am weighing 160 pounds.... and get out at 5 pm weighing 150. 145 if running asphalt. and lets not even mention the "armstrong" steering!!! Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563431 Share on other sites More sharing options...
mowerman Posted December 7 Share Posted December 7 Personally id rather sweat to death than freeze My 87 U600 had some amazing heat… didn’t even need the blower Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563459 Share on other sites More sharing options...
Geoff Weeks Posted December 7 Share Posted December 7 The 9670's had good heat, but you needed to use a winter front or the dog house got cold enough for frost on a shifter. At -35F and the winterfront buttoned up tight, the door weather strip was the next cold air leak. That much aluminum, and that cold, it is amazing that it could be comfortable. Vapor trail following the truck over mile long! My Marmon, the screws holding up the headliner would be white with frost build up. Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563461 Share on other sites More sharing options...
Geoff Weeks Posted December 7 Share Posted December 7 (edited) 17 hours ago, mowerman said: oh ya forgot about the ford cabover nissens had,,it was the model after the 2 story falcon you could hear the blower down there screeming like a turbo,,,nothing coming out of the vents at all...bob I think the W900 was inbetween the H and the CL9000. Kind looked like a "cracker box" or the Dodge Cab over of the 60's. https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.tenfourmagazine.com%2F2012%2F10%2Fold-time-trucks%2Fback-when-ford-trucks-were-1%2F&psig=AOvVaw1mrK9EUVnaWnEYpQLa8Ma4&ust=1733675512032000&source=images&cd=vfe&opi=89978449&ved=0CBEQjRxqFwoTCJibkOGKlooDFQAAAAAdAAAAABAE Edited December 7 by Geoff Weeks Quote Link to comment https://www.bigmacktrucks.com/topic/74827-cabin-heating-problem/#findComment-563465 Share on other sites More sharing options...
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