Air conditioning compressor and clutch assembly. The sensors inform the PCM if system pressures are too high or low. And the low pressure sensor provides the information on when to cycle the compressor on and off. Based on that information, the PCM toggles a ground connection to the control coil on the compressor clutch relay—the unit that actually powers the compressor clutch.
Since you get cold air on occasion, we can assume the compressor clutch works at least some of the time. If you see voltage there, check the other wire for good ground.
From the splice, the ground continues and terminates at the front of the engine. Power flows to the compressor clutch relay contacts from fuse J 10A in the power distribution center PDC. Power flows to the relay control coil from fuse 11 10A in the junction block in the left kick panel. Check for battery voltage on terminals 86 and 30 in the relay socket.
Then check for power at the compressor clutch connector again. Next, it checks the high and low pressure switches. The PCM is basically looking for continuity through the sensor switches and then to ground.
If everything is working properly, the PCM will see almost 0 voltage on that circuit. The system must have at least psi at the accumulator to close the contacts in the low pressure switch.Optimum packages 2020
The high pressure switch contacts open at psi and close again at psi. So the most likely suspects are: intermittent compressor clutch coil, bad compressor clutch relay, corrosion in the PDC, open in the wire to the compressor clutch, intermittent ground on the sensor side.
Unlike the cheaper Haynes and Chilton manuals that cover multiple year models, leaving the exact information you need to fix your car, these professional manuals cover your exact year, make, model. Plus, they contain full trouble code descriptions and troubleshooting instructions. Pricing: Eautorepair. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations.
However, Alldatadiy.Cernusco lombardone, scienze (classi m e n), prof.ssa bonalume
If you need to dig into your doors, dash or console, Alldatadiy. Find this article useful? Share it!Air conditioning stopped working, had it charged, they told me the system wasn't sending any power to the AC pump. Seems like a lot of money for something that would work if it had power to it. I am hoping someone else has repaired this for less Took to dealer he said TIPM module was tripping on high current to the ac clutch.
Had to install new compressor clutch not serviceable. Went home replaced compressor same problem TIPM module bad.
Installed slave relay to pull in clutch. They don't know how to diagnose any problem, they just throw parts at it. When they replaced the defective ac plenum door, they damaged the power plug to the ac blower causing intermittent problem.
Replaced blower motor twice to find later the plug was bad. Used that one the last time it failed, didn't burn the truck down but almost. I first notice the AC didn't work like a Dodge had a reputation of workingso I carried it to the dealer.
They said they fixed it and it was a mother board. When I drove it home it was little difference but I was working days a week didn't have time to have my truck tied up, so I lived with it. Now I'm retired and it's a pain to live with it now. Dodge engines were at one time the best but the other guys have caught up so Dodge will go down the tube with this kind of truck.
We have had constant problems with the AC on this truck since we bought it. Replaced the compressor three times and it continues to go out. There has to be something faulty about this AC system. I have talked with a lot of others with the same problem. I have bought all but 2 automobiles,trucks from Dodge dating back tosomewhere around The diesel however has spent much time at the Dodge shop problems from computer to driving light bracket falling off.
Dodge you have done this yourself by not looking out for your customers and the ones that were loyal. Here it is Nov. I worked for about a week then it quit again. I checked it out and I ran a hot wire to the compressor and it would blow cold air.
The light on the dash lights up that it is on but it doesn't blow cold. I put a test light on the power connection and it is very dim not bright.Remember Me? Results 1 to 8 of 8. Thread: Dodge Ram AC not cooling. Thread Tools Show Printable Version. I said it was working great when I dropped it off and has been for 8 years.
It even has a new condenser where I got hit head on last year. I declined his offer to fix it as I figured he might have let some freon out, who knows.Servicenow acls explained
Now it blows out 65 deg and thats as low as it gets. I cleaned the condenser coil but it wasnt even dirty. I hooked up a can of with the built in low side gauge and its pressure fell in the normal range telling me the freon level is fine. I can still here the compressor kick on so its running. What could the problem be? Im not about to take it back to the same mechanic as I feel like they already know whats wrong with it and are just trying to screw me.
Eat a slice of Humble Pie. Join Date Jun Location S. What pressure is it? Maybe they broke your blend door in the duct or it's jammed partway or holed. Look for kinked line high side? I would just pull the charge an weigh it back in. Originally Posted by snowbertca. Originally Posted by sweat hog. Originally Posted by maxster. Please read this Valves, Regulators, Filters, Etc. Subscribe to this feed. All times are GMT The time now is PM.
All rights reserved. Never argue with a crazy man.My truck was blowing cold air and all of a sudden it would blow only cool and then get back to cold and then sometimes it would blow hot but then the next day it would be cold again.
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And you can hear the Ac compressor kicking on and off back and forth. I tied adding refrigerant. And I add the correct amount cause it was in the green section and it still cuts on and off. If the compressor is turning on and off fairly quickly then that means that there is still a pressure issue. It can be caused by low refrigerant or high pressure.
Any of these will cause this to occur.
I usually install a set of pressure gauges that will read the high and the low side. If the system is low I add more refrigerant. If the high pressure side it too high then I check and see if the fan is working as it should.
Q: Ac compressor turning on and off
If the pressures are fine then there is a pressure switch issue within the system. Q: Ac compressor turning on and off asked by Juan L. And I add the correct amount cause it was in the green section and it still cuts on and off My car has miles.
My car has an automatic transmission. Robert Tomashek Automotive Mechanic. Thank Robert. Was this answer helpful? Thank you for your feedback! Sorry about that. Why wasn't this information helpful?It looks like you're new here. If you want to get involved, click one of these buttons! Howdy, Stranger! Sign in or Register. On Edmunds. Visit Edmunds How-To Guides. Service Centers in. Browse Forums by:. What Edmunds Says Pros.
May It does the cycle thing like 5 times in 5 seconds then shuts down. When can get it to work pressures are normal. Two shops have given up since I won't pay them to diagnose. Just had my compressor replaced for the same problem - it was the clutch. I had the exact same problem. I removed the fan, stuck my hand up there and I could feel the door covering the vent. It was loose but I could not get it out. I had to cut it in half with a pair of long snips and pulled it out in 2 pieces.
It seems to be working for now. How big of a job is it replace this thing? Air blows out of defrost vent no matter what position the control is in. Exception is off WTF?!My ac condenser fan has no power going to it. Before the fuse melted in the fuse box.
I replaced the fuse box and it worked for awhile but then it went out. And the fan is fine because I have hooked it up to the battery and it worked. What can I do to fix this? They should be in the power distribution box. I have the same problem. AC condenser fan will not run. I also hooked it up straight to the battery and the motor works.
Ac condenser fan not working
I checked the fuses, they are good, bought a relay and tested it but the fan still did not work The ECM controls when the condenser fan cycles on n off. Start at the fan plug, see if you get power And the fan is fine because I have hook The AC condenser fan doesn't work also when my truck is running but in park or at a light the AC doesn't blow cold air when I get back to driving little ways it will kick out cold air.
I checked the fan ,replaced resistor,checked fuse and relay. I pulled switch out of dash. I have no fire coming in on plug for fan ,the other little plug has one wire which is hot. What should I check ne I replaced the low side hose. I put in new coolant with the truck on and AC on and noticed that the fan was not working.
I jumped the fan and it does work.Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing. Average rating from customers who received a AC Compressor Replacement.How to reset epson printer wf 2750
Learn More. Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM. An AC system has many components: compressor, condenser, receiver dryer, evaporator, and hoses. The AC compressor has several moving parts including pistons and valves. These internal parts can fail, causing the AC compressor to stop working. It is common for the internal parts of the compressor to come apart and disperse metallic debris throughout the system.
Consequently, it is a requirement to replace the orifice tube and the receiver dryer when replacing the compressor since some of the debris may have ended up there. For an AC compressor to work, it needs a clutch, bearing, and an electrical connector. The clutch can burn or the bearing can fail.Dodge Ram AC problems
If the bearing or clutch have failed, it is recommended that the compressor be replaced. Sometimes replacing the entire compressor with a remanufactured one can be cheaper than replacing an individual clutch or bearings. It is also common for the seals in the AC compressor to go bad.
If the seals no longer hold, you will need a new compressor, as the seals cannot be replaced. A compressor may also fail if there is sludge or debris in the air conditioning system.
If there is sludge or debris, the hoses, evaporator, and condenser should be flushed to get rid of the contaminants.Dc motor position pid control arduino code
When it is not possible to flush the parts, you may need to replace those parts. This service comes with receiver dryer and orifice tube. It is very common for metals from the compressors to go throughout the system and get caught in different components. If the compressor is replaced without the dryer and the orifice tube, it will ruin the new compressor and it will not be covered by the warranty from parts manufacturers. The most common reason for an AC compressor to fail is leaky seals and inadequate lubrication.
If you notice a change in the temperature of the air through the AC vents not as cold as it should beget it inspected. In addition to your comfort, air conditioning systems add value to your vehicle.Vscode terminal ctrl c
You should keep your AC fully operational. In some systems, the hot and cold air are blended to achieve the desired temperature setting. In these cases, when the AC system fails, you will not only NOT get any cold air, but the entire temperature regulation is thrown off. Get an upfront price. Service Area.
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