megatron Posted May 12, 2018 Share Posted May 12, 2018 (edited) Hi everyone, I have 05 Mack CXN613 and A/C quit working, after I check all fuses notice that APADS lights not coming on at all so I'm not sure how to check that component because green wire is powered when I turn A/C on is there something I'm missing, also I don't have fuse guide in my outer fusebox cover and not sure what fuse is for what, if anybody knows plz let me know it's hot in this cab 😩 Edited May 12, 2018 by megatron Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/ Share on other sites More sharing options...
Macktech689 Posted May 12, 2018 Share Posted May 12, 2018 Voltage to the APADS also comes from fuse 41 ( 15a ) down the red wire, but before it gets there it runs through the Freon high pressure switch connector. Also check the APADS ground. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398729 Share on other sites More sharing options...
megatron Posted May 12, 2018 Author Share Posted May 12, 2018 Thanks, as I said before I don't have fuse numbers it's missing, there is one fuse in outer box that is not powered. is 41 in box on the firewall?? Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398734 Share on other sites More sharing options...
megatron Posted May 12, 2018 Author Share Posted May 12, 2018 1 hour ago, Macktech689 said: Voltage to the APADS also comes from fuse 41 ( 15a ) down the red wire, but before it gets there it runs through the Freon high pressure switch connector. Also check the APADS ground. I'm sure there is no voltage in red wire Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398735 Share on other sites More sharing options...
Macktech689 Posted May 13, 2018 Share Posted May 13, 2018 Fuse 41 is in the EPDM outside on the firewall, it's a mini fuse, right side 3rd from the top. Marked fan clutch 15a. If that is the fuse with no power, it comes off power relay #3 inside the cab behind the glove box area. Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398777 Share on other sites More sharing options...
megatron Posted May 13, 2018 Author Share Posted May 13, 2018 Thank you now I have all info needed. Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398808 Share on other sites More sharing options...
megatron Posted May 14, 2018 Author Share Posted May 14, 2018 Fuse have power if right info, checked all wire between fuse and HP sensor no any voltage Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398809 Share on other sites More sharing options...
megatron Posted May 14, 2018 Author Share Posted May 14, 2018 (edited) Look like the problem is somewhere between fuse and conector to A/C system. I checked everything around that I can see. Now I have yellow light on with 4-2 message and I know that's fan output. If it's not somewhere in harness than don't know where else to look. I run another wire to power APADS and it's start working normally, but 4-2 didn't go away so I hope I'm wrong, as I see the problem is hiding in the harness, where...?? God know. I'm on the road now and don't have tools to trace problem, or you have better idea 💡 Edited May 14, 2018 by megatron Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398811 Share on other sites More sharing options...
megatron Posted May 14, 2018 Author Share Posted May 14, 2018 How ECM know that fan output is Not on? Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-398852 Share on other sites More sharing options...
OldRedMack Posted May 28, 2018 Share Posted May 28, 2018 The fan and a/c are tied together. I have the viscous fan and did everything I could to work around it and nothing worked until I replaced the viscous fan clutch. Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-399620 Share on other sites More sharing options...
Robert 74 Posted July 29, 2019 Share Posted July 29, 2019 Hi. The AC in the sleeper is not working. Can you please tell where is the fuse? Thank you! Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-428967 Share on other sites More sharing options...
1971model Posted July 8, 2020 Share Posted July 8, 2020 I have a 2006 MN mack granite quad. The A/C quit working all fuses are good new switch was just replaced the dealership said some box in the dash is bad $1400.00 to replace it plus 10 hours of labor to do it,???? That about the amount of to switch an engine !@@?," Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-455346 Share on other sites More sharing options...
Anthony T Posted July 22, 2020 Share Posted July 22, 2020 I have a 2015 Mack Granite AC system was just fixed two weeks ago the AC keeps kicking on and off on the dashboard it will work for a little while then it will quit sometimes if you mess with the relay it kicks back on I tried replacing the relay now it's not working at all any ideas Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-456375 Share on other sites More sharing options...
Adam Posted November 24, 2020 Share Posted November 24, 2020 2001 Mack metroliner a/c cuts out after 5 minutes only on high not sure why Any ideas anyone???? Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-464295 Share on other sites More sharing options...
ArnoldFigWM Posted May 26, 2021 Share Posted May 26, 2021 Does anyone know where I can locate the APADS control unit on a 2007 Mack Granite Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-474296 Share on other sites More sharing options...
ArnoldFigWM Posted May 26, 2021 Share Posted May 26, 2021 19 minutes ago, ArnoldFigWM said: Does anyone know where I can locate the APADS control unit on a 2007 Mack Granite Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-474297 Share on other sites More sharing options...
Eric Day Posted December 7, 2022 Share Posted December 7, 2022 Ac is blowing heat is there a fuse I should be looking for to replace? Oh BTW I have a 2021 Mack Anthem Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-517619 Share on other sites More sharing options...
Hayseed Posted December 7, 2022 Share Posted December 7, 2022 Have you checked that the Compressor Clutch is engaging? also have you looked in the sight glass on the receiver dryer for bubbles...?? 1 Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-517626 Share on other sites More sharing options...
Joey Mack Posted December 7, 2022 Share Posted December 7, 2022 (edited) I bet his compressor clutch is the type you can't see.. they started that crap 10+ years ago.. it turned a quick inspection into a half day event... Edited December 7, 2022 by Joey Mack Poor sperring Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-517674 Share on other sites More sharing options...
czrG Posted September 16 Share Posted September 16 I have a 2009 Mack. AC is not blowing cold air. I connected the ac machine to the unit. The low side psi is High and the high side psi is Low. Recovered the refrigerant. I only pulled 1.4lbs. Charged the system with 3lbs. The same issue continues. Check the ac comp. clutch. The ac com. clutch on the unit can't be see. I checked the resistance at the ac comp. clutch. I got 4.5ohms, which I believe is correct. Checked for voltage at the ac comp. electrical connector (harness side). No voltage is getting to the ac comp. Checked the fuses and found fuse FU53 (AC Comp. Clutch) is also not getting power. Checked the fuse to verify if it was damaged. I even swapped out the fuse for another 10amp fuse. Issue continues. I inspected the harness for damage by the ac comp. electrical connector. No damaged wires are visible. What would be my next step. I have not been able to find any other fuse boxes. Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-558638 Share on other sites More sharing options...
Joey Mack Posted September 16 Share Posted September 16 did you check the HVAC controls in the cab, and the thermostat in the condesor core? What chassis? Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-558642 Share on other sites More sharing options...
czrG Posted September 17 Share Posted September 17 I removed some zip-ties to the ac compressor wiring harness, searched for damaged wires, found no damage. Rechecked for voltage. Now I'm getting battery voltage to the ac comp. electrical connector and to fuse53. Wiggled the wiring harness but cannot duplicate no voltage issue. Checked the pressure switch and fan switch for voltage. Getting battery voltage. I went ahead and replaced the ac dryer and expansion valve. Issue continued. I've inspected the cabin air filter and found no issue. No, I have inspected the thermostat. I will do so. Thank you for the response. Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-558656 Share on other sites More sharing options...
The Heinz Posted September 17 Share Posted September 17 We see the connector going into the AC control panel melt before, there's a Service Bulletin that came out addressing the issue. Gives part numbers to replace/modify the connector to prevent it from happening again. I'll attach it so you can use it to help if needed. I won't say that is your issue, but we have seen all kinds of symptoms as the result of this failure. Worth a shot to look I guess. sb724008 (1).pdf Quote Link to comment https://www.bigmacktrucks.com/topic/53342-ac-not-working/#findComment-558659 Share on other sites More sharing options...
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