JacobB89 Posted September 3, 2011 Report Share Posted September 3, 2011 Its a 1996 dodge ram 2500 diesel turn a/c on nothing happens blows hot air compressor is not engaging use a paper clip to jump the compressor and it kicks on lines get ice cold but blowing hot air still any help? Quote Big Wheels Are Like G-Strings...Anyone can put them on but it don't mean they look good..... Link to comment Share on other sites More sharing options...
Rev. Wrath Posted September 3, 2011 Report Share Posted September 3, 2011 (edited) The first step is hooking gauges up to it. It may just be low on freon. If you go to any auto parts store, they will have R-134a you can buy with a gauge attached to it. If the pipe going in to the evaporator (in to your firewall) is REALLY cold and getting frosty your orifice tube is most likely clogged. It's an easy fix, but not something that can be done at home unless you have a vacuum pump handy. Edit: Did you jump the compressor at the pressure switch? If so, don't do this too often because you will burn up your compressor. The pressure switch is there to protect the compressor from high AND low pressure. Hope this helps. Anything else, just ask here. I'll do my best to help. Edited September 3, 2011 by Rev. Wrath Quote Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted September 3, 2011 Report Share Posted September 3, 2011 You may have a actuator that switches between hot and cold, I had the same issue with hot and cold not switching. I think it is called a mode door actuator. Could be that. Get a odb meter and check it. (rent or borrow one from a auto store, they are like 250 if u buy 1) Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted September 3, 2011 Report Share Posted September 3, 2011 Might be obd, not sure, either odb or obd meter and one will be for 1996- later and another will be 1996ish to present Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
Rev. Wrath Posted September 3, 2011 Report Share Posted September 3, 2011 Aaahhhh hell. Good catch ChevyBoy. I didn't even think of that lol. Quote Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted September 4, 2011 Report Share Posted September 4, 2011 (edited) Aaahhhh hell. Good catch ChevyBoy. I didn't even think of that lol. only reason i knew to suggest that is because i had to do it to my truck. Its a little 3in by 3in and 1in thick little black box with a hole in it. Mine was under the dash. I think its like a 40 dollar or so part iirc, its been a while. it is this without the metal on the top and whatever behind it. like i said before, get a OBD1 or OBD2 meter depending on the make and year of your vehicle and hook it up, turn accesories on and it will spit out a code, look up the code and it will tell you whats wrong. Edited September 4, 2011 by ChevyBoy95 Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
JacobB89 Posted September 4, 2011 Author Report Share Posted September 4, 2011 (edited) double post. edit about that door actuator would that also cause the compressor to not turn on? Edited September 4, 2011 by JacobB89 Quote Big Wheels Are Like G-Strings...Anyone can put them on but it don't mean they look good..... Link to comment Share on other sites More sharing options...
JacobB89 Posted September 4, 2011 Author Report Share Posted September 4, 2011 (edited) The first step is hooking gauges up to it. It may just be low on freon. If you go to any auto parts store, they will have R-134a you can buy with a gauge attached to it. If the pipe going in to the evaporator (in to your firewall) is REALLY cold and getting frosty your orifice tube is most likely clogged. It's an easy fix, but not something that can be done at home unless you have a vacuum pump handy. Edit: Did you jump the compressor at the pressure switch? If so, don't do this too often because you will burn up your compressor. The pressure switch is there to protect the compressor from high AND low pressure. Hope this helps. Anything else, just ask here. I'll do my best to help. That was the first thing I did was check the Freon and that's fine and full.i believe it is the tube that runs to the evaporator but ill have to look at it again in the morning. yes just quick jump to see if the compressor was bad or not since its not turning on with out it being jumped. will do what I look into it in the morning. You may have a actuator that switches between hot and cold, I had the same issue with hot and cold not switching. I think it is called a mode door actuator. Could be that. Get a odb meter and check it. (rent or borrow one from a auto store, they are like 250 if u buy 1) ill check that as well see if the store here has one and if i have the obd hook up on it thanks. Edited September 4, 2011 by JacobB89 Quote Big Wheels Are Like G-Strings...Anyone can put them on but it don't mean they look good..... Link to comment Share on other sites More sharing options...
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