Compressor cycling fix
08-27-2018, 04:24 PM
#1201
Senior Member
Hmm never would have thought of that, probably because the first thing I do when I get in is switch to max a/c, they have some ripe sewerage stations around not to mention all the fumes from traffic, especially GM's damn....seems like those stink boxes are always ahead of me puking all that stink into my truck. 
I'm seeing a pattern here with rapid cycling times on those with the a/c issue, mine does not cycle like the others, it works like it should.
I still say those trucks are either under charged or have a malfunctioning txv or some other sensor failure.
Wish I still worked at the dealer at times, I hate not being able to fix a problem child, all the crap I work on these days is so monotonous/repetitive it drives me up a wall.
.
I'm seeing a pattern here with rapid cycling times on those with the a/c issue, mine does not cycle like the others, it works like it should.
I still say those trucks are either under charged or have a malfunctioning txv or some other sensor failure.
Wish I still worked at the dealer at times, I hate not being able to fix a problem child, all the crap I work on these days is so monotonous/repetitive it drives me up a wall.
.
08-27-2018, 04:37 PM
#1202
Senior Member
08-31-2018, 09:58 AM
#1203
It Stinks in Here...
To find the actual capacity of the A/C system in out trucks, someone would have to measure quite a few things but I have been told that a typical car A/C is 4-5 tons. That is enough to cool most houses. Why so much capacity? A truck cab is basically a metal box with single pane windows and once thru cooling (unless on MAX). The R value of a typical home wall is >13. Single pane glass is ~1 and it also lets in sunlight.
So yes your A/C is quite capable of operating the evaporator below freezing temperature and making itself into a giant ice cube.
So yes your A/C is quite capable of operating the evaporator below freezing temperature and making itself into a giant ice cube.
07-15-2019, 09:47 AM
#1204
Wow! A lot of reading but very good info. Thank you to all. So, I am here for the same reason, poor AC performance. My problems started when I purchased a 2013 SCREW Raptor about 3 weeks ago. I absolutely love this truck. I love driving it, looking at it,etc. Have always wanted one and I finally got one to replace my 250K miles 2009 Chevrolet Silverado. I knew something was up with the AC during the test drive. Before I signed paper work on it I went over all issues with the truck with the sales manager. He said, don't worry, we are giving you a 3000 mile, 90 day warranty. Anything happens or anything that needs to be fixed, Bumper to Bumper. He even said, drive the heck out of it. This way if anything goes we can fix it before the warranty expires. Awesome!
I drove the truck home on a Friday, enjoyed for the weekend and took it back first thing Monday AM for the issues I found over the weekend.
1. AC not cooling below 60 degrees (thermometer in the vent)
2. Sunroof not working, stuck slightly open producing wind noise.
3. Intermittent check engine light.
4. AC controls do not work. When adjusting from heat to cool, nothing happens. No change in sound or fan speed when pressing recirculating air button.
Picked the truck up a whole week later. They called me about 5 minutes before they closed that my truck was done. Great! I get there, they hand me the keys and leave. Literally, 5 minutes after I got there the place was locked up and everyone was gone, wow. I fire up the truck, check sun roof, great, it works now. Hmmm..check engine light is still on? AC? Nope, not cooling. Still not going below 60 degrees and no change in AC controls.
This was on a Friday, frustrated, I took it to an AC shop on Saturday. Told them, FIX IT! Don't care how much or what, just fix it. They kept it over the weekend, called me Monday afternoon, truck is ready. Again, awesome! Shop owner told me my AC condenser was clogged, creating high pressure issues. They replaced the condenser and the expansion block. Flushed out the system and get everything back to specs. As I am driving home I am telling myself, it's better, it's better...nope. Thermometer in vent still won't go past 60 degrees. Outside temps are over 100 degrees and humid. My truck is all black, yeah, it's hot.
I did get it tinted this weekend based on advice from someone in this thread. Went 5% all back windows, 35% front windows, 5% windshield strip and 35% on the sunroof. They told me they couldn't go 5% because they were afraid it would break the glass under direct sunlight. Ok, no big deal. Anyway, I did speak to the dealer and they want me to bring it back. The sales manager apologized and said they would fix it 100%. I am thinking all the blend door motors are probably out. So I will ask them to replace them all and see where that gets us. If we can get it at least to 50 degrees then I can try the resistor hack or what ever else can get me below 50 degrees. Dropping it off in about 45 minutes. Lets see how it goes. Wish me luck.
I drove the truck home on a Friday, enjoyed for the weekend and took it back first thing Monday AM for the issues I found over the weekend.
1. AC not cooling below 60 degrees (thermometer in the vent)
2. Sunroof not working, stuck slightly open producing wind noise.
3. Intermittent check engine light.
4. AC controls do not work. When adjusting from heat to cool, nothing happens. No change in sound or fan speed when pressing recirculating air button.
Picked the truck up a whole week later. They called me about 5 minutes before they closed that my truck was done. Great! I get there, they hand me the keys and leave. Literally, 5 minutes after I got there the place was locked up and everyone was gone, wow. I fire up the truck, check sun roof, great, it works now. Hmmm..check engine light is still on? AC? Nope, not cooling. Still not going below 60 degrees and no change in AC controls.
This was on a Friday, frustrated, I took it to an AC shop on Saturday. Told them, FIX IT! Don't care how much or what, just fix it. They kept it over the weekend, called me Monday afternoon, truck is ready. Again, awesome! Shop owner told me my AC condenser was clogged, creating high pressure issues. They replaced the condenser and the expansion block. Flushed out the system and get everything back to specs. As I am driving home I am telling myself, it's better, it's better...nope. Thermometer in vent still won't go past 60 degrees. Outside temps are over 100 degrees and humid. My truck is all black, yeah, it's hot.
I did get it tinted this weekend based on advice from someone in this thread. Went 5% all back windows, 35% front windows, 5% windshield strip and 35% on the sunroof. They told me they couldn't go 5% because they were afraid it would break the glass under direct sunlight. Ok, no big deal. Anyway, I did speak to the dealer and they want me to bring it back. The sales manager apologized and said they would fix it 100%. I am thinking all the blend door motors are probably out. So I will ask them to replace them all and see where that gets us. If we can get it at least to 50 degrees then I can try the resistor hack or what ever else can get me below 50 degrees. Dropping it off in about 45 minutes. Lets see how it goes. Wish me luck.
07-15-2019, 07:51 PM
#1205
Follow the advice and install the resister. The shop will never improve the cooling. I have a 2013,all black and live in south Fla. This is the biggest improvement I’ve ever found on this sight. I thank all those who took the time to experiment and find a solution to our cooling systems. It’s in the low 90s now and I’m getting 40 degrees at the vents. Such an easy fix.
The following users liked this post:
ToeKutter (07-16-2019)
07-16-2019, 09:59 PM
#1206
Senior Member
FWIW I had the heat/cool blend door actuator fail on my 2011. Found is a very popular part. It is pretty easy to get to. Don't know about the floor/dash/defrost acurator(s).
The resistor works great. Just be careful you don't freeze the evaporator.
The resistor works great. Just be careful you don't freeze the evaporator.
07-18-2019, 01:00 PM
#1208
Senior Member
Behind the glovebox there is a connector. That is to the thermistor that is in the evaporator. You can push the resistor leads into the back of the connector so it is in parallel with the thermistor. There are pictures in this thread.
07-29-2019, 05:55 PM
#1209
I’ve read this front to back twice and must be a degenerate. I would love to see an easy step by step with pictures of how to build this along with links to parts etc. I know some of this thread has random after shots of what was built and multiple mentions of different things used but for us dummies can someone create a short and sweet how to with step by step photos making this and installing? At this point I would think a sticky with this howto would be beneficial for this forum since it affects so many people. If you want to go full on gold medal hero style make a video of discussing the parts , building and installing this in the most simple idiotic format. Thoughts and can someone who’s successfully done this mod take the lead?
07-30-2019, 09:06 AM
#1210
Week 2 and my truck is still at the dealership. Went by to check on it and was parked in the back of the lot covered in dirt. Like it hasn't been touched in 2 weeks. Went inside and spoke to the Service Manager. Asked him for an update on my truck. Said they are waiting on parts to come in. Said it should be ready this week. Wish me luck. 