trojanbulldog Posted March 19, 2015 Share Posted March 19, 2015 I have a 2012 CXU613 Pinnacle day cab with an automatic transmission. I bought the truck used and I'm experiencing many sensor and electrical problems. When these problems are behind me I love the truck but when they pop up I feel like burning this truck to the ground. My latest problem is under subzero temperatures the clutch fan runs continuously. I'm wondering if anyone else is or has experienced the same problem and have the solution. Quote Link to comment https://www.bigmacktrucks.com/topic/39321-clutch-fan-dilemma/ Share on other sites More sharing options...
Mackpro Posted March 19, 2015 Share Posted March 19, 2015 Make sure you dont have a A/C high pressure issue causing the fan clutch to stay engaged. We have seen problems when the defroster is on it also turns on the A/C compressor and if there is a blockage and the high pressure sensor is tripped it will turn on the fan clutch. Mack has 2 types of electronic fan clutches and 1 type of air fan clutch. Quote Link to comment https://www.bigmacktrucks.com/topic/39321-clutch-fan-dilemma/#findComment-283190 Share on other sites More sharing options...
Mackdaddy2030 Posted March 20, 2015 Share Posted March 20, 2015 I have mine in the shop right now and that's one of the things wrong with it. I'll let you know what I hear.Mine is a '12 CHU with 445C and Mdrive Quote Link to comment https://www.bigmacktrucks.com/topic/39321-clutch-fan-dilemma/#findComment-283283 Share on other sites More sharing options...
felicello122 Posted March 21, 2015 Share Posted March 21, 2015 niger Quote Link to comment https://www.bigmacktrucks.com/topic/39321-clutch-fan-dilemma/#findComment-283435 Share on other sites More sharing options...
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