Mike Donohue Posted February 26, 2019 Share Posted February 26, 2019 If I start the truck (Cold or warm) the heat will not work, sometimes the temp gauge goes up enough to kick the fan on although the air is cold blowing thru. Odd thing is , once you go a few hundred yards all is good. Is the thermostat sticking? Why would it suddenly open from moving a short distance? 1999 CH613 Quote Link to comment https://www.bigmacktrucks.com/topic/55844-thermostat-issue/ Share on other sites More sharing options...
JoeH Posted February 27, 2019 Share Posted February 27, 2019 Dumb question: is your coolant level low? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55844-thermostat-issue/#findComment-416778 Share on other sites More sharing options...
Mack Technician Posted February 28, 2019 Share Posted February 28, 2019 (edited) A.D.D. comment: Really like the paint job on that truck icon! For some reason it makes me think of old school Christmas candy...……. Edited February 28, 2019 by Mack Technician Quote Link to comment https://www.bigmacktrucks.com/topic/55844-thermostat-issue/#findComment-416851 Share on other sites More sharing options...
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