Moparmike Posted May 16, 2017 Share Posted May 16, 2017 E7 motor rd series..if I let the truck idle it gets down to 40 degrees in it but if I drive it blows hot air ..where should I start looking.. Quote Link to comment https://www.bigmacktrucks.com/topic/49848-2000-mack-ac-problemhelp/ Share on other sites More sharing options...
0 Mackpro Posted May 16, 2017 Share Posted May 16, 2017 Install some coolant shut off valves on the heater hoses on the engine if you don't already have them, it should help a lot. Quote Link to comment https://www.bigmacktrucks.com/topic/49848-2000-mack-ac-problemhelp/#findComment-369954 Share on other sites More sharing options...
0 Moparmike Posted May 16, 2017 Author Share Posted May 16, 2017 I've turn the 1 off that's on the driver side of the motor..it still blows hot Quote Link to comment https://www.bigmacktrucks.com/topic/49848-2000-mack-ac-problemhelp/#findComment-369959 Share on other sites More sharing options...
0 Moparmike Posted May 19, 2017 Author Share Posted May 19, 2017 I've turn the 1 off that's on the driver side of the motor..it still blows hot This reading is from the a.c. running while sitting still ..does it look right..i have no clue lol..also it cuts off and on ..i added 2 cans of 134a still off and on .thanks for the help Quote Link to comment https://www.bigmacktrucks.com/topic/49848-2000-mack-ac-problemhelp/#findComment-370197 Share on other sites More sharing options...
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Moparmike
E7 motor rd series..if I let the truck idle it gets down to 40 degrees in it but if I drive it blows hot air ..where should I start looking..
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