Mack Hammer Posted July 31, 2022 Share Posted July 31, 2022 coolant fan runs full time with A/C turned on Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/ Share on other sites More sharing options...
Joey Mack Posted July 31, 2022 Share Posted July 31, 2022 And???? Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504974 Share on other sites More sharing options...
terry Posted July 31, 2022 Share Posted July 31, 2022 Sounds normal to me!! terry Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504976 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 don't think fan should kick on until temp is over 180 degrees Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504983 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 fan on non stop all day is not normal ?? turn A/C off and the fan goes off Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504984 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 I changed green high pressure switch but didn't help. Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504985 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 It is robbing my horse power and causing seriously bad fuel economy. Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504987 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 when the fan is on, unplug the binary switch at the air dryer, if it cuts off, that may be it.. inspect the plug for burnt contacts. more to come ,,, jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504988 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 Does everyone's fan run when truck is at 100 degrees ?? Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504989 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 will try the binary switch and see what's going on with it. someone else suggested high pressure sensor/switch could cause it to do this. Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504990 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 same switch Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504991 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 appreciate the advise jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504992 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 👍 the switch that is screwed into the receiver drier. that is the binary switch.. it measures hi and low pressure.. Is the engine temperature normal? around 185? jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504993 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 Binary is on top of receiver drier. high pressure is green and on the high side steel line. Pretty sure two different switches. Gonna check it out tomorrow for sure. My driver takes the truck home with him 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504994 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 I just looked back to the first post... 2007? ASET or MP engine? Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504996 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 yes truck is doing good on temp 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504997 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 AI 400 Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-504998 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 yes 2007 CV713 Granite AI400 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505000 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 have you had any recent EECU programming done? You should have the 'Smart fan' system? It is electric? right? Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505002 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 yes electric, but no programing done on the computer Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505003 Share on other sites More sharing options...
Joey Mack Posted August 1, 2022 Share Posted August 1, 2022 I feel like you are doing a good job to get this fixed.. stay on the simple stuff first path... keep in touch,, a couple other guy's here are still active within dealership's and have fleet's and the software to fix them. They will have more info for you if what you are doing doesn't get it done.. good group of guys here,, jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505004 Share on other sites More sharing options...
Mack Hammer Posted August 1, 2022 Author Share Posted August 1, 2022 Rite on. I appreciate the feedback Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505006 Share on other sites More sharing options...
Quickfarms Posted August 1, 2022 Share Posted August 1, 2022 The coolant fan should be running when the ac is on and the compressor clutch is engaged, especially standing still. the ECM may turn it off when the truck is moving the ac will not work well unless air is moving through the condenser 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70205-2007-cv713-granite-coolant-fan-runs-full-time-with-ac-turned-on/#findComment-505070 Share on other sites More sharing options...
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