AC Main Blend Door

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scoutpappa
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AC Main Blend Door

Post by scoutpappa » Sat Oct 20, 2018 8:46 pm

Anyone had there AC blend door decide to close randomly when the truck has been running for a while? 2017 and honestly the last time I had this happen it was with my 2009 1500 and it was a recall/re-map that was the issue.

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Re: AC Main Blend Door

Post by scoutpappa » Sat Oct 20, 2018 8:47 pm

It did reset when I stopped and re-started, just randomly weird.

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Re: AC Main Blend Door

Post by scoutpappa » Sun Oct 21, 2018 3:17 pm

I take it with 55 views and no replies either no one has had this issue or it self fixed like in my situation. I was somewhat concerned as this happened on a day that I was running all of the rough gravel roads in one of the plant propers I deal with regularly.

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Re: AC Main Blend Door

Post by RustyPW » Sun Oct 21, 2018 8:12 pm

On the 3G's. The blend doors broke. Hopefully on the newer ones. They fixed it.
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Mods to the PW; Nerffed Mopar RockRails, Wheel Well Liners, Bushwacker Pocket Fender Flairs, Garvmin dezl 560LMT GPS, Power Wagon Winch Kit, Line X Ultra Bed Liner, PIAA Headlight Bulbs, PIAA 580 Driving Lights (135 watt), PIAA 520 Fog Lights (135 watt), PIAA 520 ATP Off-Road Lights (135 watt), Locker Bypass, Modifed Rockcrusher Diff Covers, Mopar Utility Bed Rails and Tool Box, Warn Winch Wireless Remote Control, "el-cheapo" Inclinometer, Airaid CAI, Winch TPS Bypass, 35" Toyo's, Mopar Spare Tire Lock, 'T' Steering Linkage, Modifed PSC Steering Brace, P3 Brake Controller, Modifed Fusion "mall crawler" rear bumper , PIAA 1500 Back-Up Lights, 1Ton HEMI Tranny Cooler, Leer 100XR Bed Cap, Factory Tow Mirrors, CenterLine Rims 17x9-5.25 BS, Mag-Hytec Tranny Pan, AutoMeter Gauges, PSC Extreme Hydro Assist Steering, Carli G2 Track Bar, Carli Ball-Joints, Dynatrac FreeSpin Hubs, Snorkel, RCV Axles, EBC Pads & Rotors, Aluminess Front Bumper, 14,000 lb Pul-Pal, 60" Extreme Hi-lift Jack, and more riggin' equipment, Carli Long Travel Air Bags, Bilstein 7100 Shocks - Carli Valving, Carli Control Arms, Thuren 3" SoftRide Springs, Thuren Rear Shackles, MagnaFlow Muffler, Crown Stainless Brake Lines, MORE STUFF COMIN'.

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Re: AC Main Blend Door

Post by Reloaderguy » Sun Oct 21, 2018 9:06 pm

It has happened to my truck too. The system just kind of gets confused. I thought it was a broken blend door like is common on 3rd gen trucks but the system reset and pow, cold AC again.
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Re: AC Main Blend Door

Post by ramv » Sun Oct 21, 2018 9:21 pm

2nd gen it would do it but it was a vacuum issue. I added bigger vacuum reservoirs and check valves and addressed some other vacuum system issues. Oh, and regeared so the truck wasn't at full throttle all the time. (Full throttle it would go to defrost.)
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Re: AC Main Blend Door

Post by scoutpappa » Mon Oct 22, 2018 7:39 pm

Reloaderguy wrote:
Sun Oct 21, 2018 9:06 pm
It has happened to my truck too. The system just kind of gets confused. I thought it was a broken blend door like is common on 3rd gen trucks but the system reset and pow, cold AC again.
I even pulled the glove box when I stopped for gas and plucked the blend door motor and harness. Guess being an EE means I still think a swift kick or punch will fix most electrical issues. :box:

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Re: AC Main Blend Door

Post by TwinStick » Tue Oct 23, 2018 2:40 pm

https://www.youtube.com/watch?v=cc7DzXmR8kQ Maybe actuators, like this ?
In WNY State. 2008 Red QC PW G56. No lift yet, stock size tires. It pulls an 18' 2016 Starcraft AR One Extreme, 3500 lbs.
Load Pro 35 helper springs. 2015 A.R.E. MX Series custom cap. PCP front diff cover protector. Mag-Hytec 6 qt rear diff cover. K&N replacement air filter only. Dual grounded throttle body. Winch TPC bypass. Fab Four rear bumper. DURA BAK lined rocker protection. And a bunch of new front end stuff.

G-56 Gear ratios: 1st) 6.29:1 2nd) 3.48:1 3rd) 2.10:1 4th) 1.38:1 5th) 1.0:1 6th) 0.79:1 Rev 6.29:1 --- = 78.01613:1 Crawl Ratio
-------------------------5.94:1--------3.28:1-------1.98:1-------1.31:1-------1.0:1-------0.74:1-----5.42:1 ---- = 73.675:1
545RFE----------------3.0:1---------1.67:1--------1.0:1--------0.75:1-------0.67:1------------------3.0:1 -------=37.21:1

2013+ 32.47 crawl ratio...............Can you see the trend ??????????????

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Re: AC Main Blend Door

Post by NickTF » Tue Oct 23, 2018 3:07 pm

I'm pretty sure mine on my 2015 acts up from time to time as the AC just goes moderate cold to luke warm at infrequent random times.

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Re: AC Main Blend Door

Post by RustyPW » Tue Oct 23, 2018 6:34 pm

During warm weather. No sounds. When it gets cold. When I first start up. Mine sounds like someone is opening a lid to a coffin. :shock:
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Mods to the PW; Nerffed Mopar RockRails, Wheel Well Liners, Bushwacker Pocket Fender Flairs, Garvmin dezl 560LMT GPS, Power Wagon Winch Kit, Line X Ultra Bed Liner, PIAA Headlight Bulbs, PIAA 580 Driving Lights (135 watt), PIAA 520 Fog Lights (135 watt), PIAA 520 ATP Off-Road Lights (135 watt), Locker Bypass, Modifed Rockcrusher Diff Covers, Mopar Utility Bed Rails and Tool Box, Warn Winch Wireless Remote Control, "el-cheapo" Inclinometer, Airaid CAI, Winch TPS Bypass, 35" Toyo's, Mopar Spare Tire Lock, 'T' Steering Linkage, Modifed PSC Steering Brace, P3 Brake Controller, Modifed Fusion "mall crawler" rear bumper , PIAA 1500 Back-Up Lights, 1Ton HEMI Tranny Cooler, Leer 100XR Bed Cap, Factory Tow Mirrors, CenterLine Rims 17x9-5.25 BS, Mag-Hytec Tranny Pan, AutoMeter Gauges, PSC Extreme Hydro Assist Steering, Carli G2 Track Bar, Carli Ball-Joints, Dynatrac FreeSpin Hubs, Snorkel, RCV Axles, EBC Pads & Rotors, Aluminess Front Bumper, 14,000 lb Pul-Pal, 60" Extreme Hi-lift Jack, and more riggin' equipment, Carli Long Travel Air Bags, Bilstein 7100 Shocks - Carli Valving, Carli Control Arms, Thuren 3" SoftRide Springs, Thuren Rear Shackles, MagnaFlow Muffler, Crown Stainless Brake Lines, MORE STUFF COMIN'.

Moab '10, '12, '14.
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Re: AC Main Blend Door

Post by scoutpappa » Tue Oct 23, 2018 7:19 pm

Kinda the opposite being in Houston. AC is active most of the year for us. I think this truck (2017) acts the same as my 2009 insofar as the main blend door closes when you shut down and opens when you start up and then adjusts when it calcs the differential in temp (so ambient vs. call). It only concerned me as this happened while operating for quite a while as opposed to not opening when I started which is what happened with the 2009. Also when this happened with the 2009 the AC was escaping down. In this truck the door was completely shut meaning I had no flow. Thankfully it is getting to be winter and it was only 82 ish.

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Re: AC Main Blend Door

Post by Reloaderguy » Tue Oct 23, 2018 7:43 pm

Do you have a cabin filter? Mine was pretty dirty and I was thinking there may be a resistance factor.
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Re: AC Main Blend Door

Post by scoutpappa » Thu Oct 25, 2018 7:25 pm

Just changed it and went with the K&N cabin filter so I could just clean it out. I do quite a lot of dirt roads so I'll check that. These are not like the intake air filters so I wanted an option that I could clean whenever, but good point on checking it.

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Re: AC Main Blend Door

Post by TwinStick » Fri Oct 26, 2018 9:58 pm

RustyPW wrote:
Tue Oct 23, 2018 6:34 pm
During warm weather. No sounds. When it gets cold. When I first start up. Mine sounds like someone is opening a lid to a coffin. :shock:
:rofl: :rofl: :rofl: :rofl:

Nothing wrong there......just creaks & groans from age......like us !!! :rofl:
In WNY State. 2008 Red QC PW G56. No lift yet, stock size tires. It pulls an 18' 2016 Starcraft AR One Extreme, 3500 lbs.
Load Pro 35 helper springs. 2015 A.R.E. MX Series custom cap. PCP front diff cover protector. Mag-Hytec 6 qt rear diff cover. K&N replacement air filter only. Dual grounded throttle body. Winch TPC bypass. Fab Four rear bumper. DURA BAK lined rocker protection. And a bunch of new front end stuff.

G-56 Gear ratios: 1st) 6.29:1 2nd) 3.48:1 3rd) 2.10:1 4th) 1.38:1 5th) 1.0:1 6th) 0.79:1 Rev 6.29:1 --- = 78.01613:1 Crawl Ratio
-------------------------5.94:1--------3.28:1-------1.98:1-------1.31:1-------1.0:1-------0.74:1-----5.42:1 ---- = 73.675:1
545RFE----------------3.0:1---------1.67:1--------1.0:1--------0.75:1-------0.67:1------------------3.0:1 -------=37.21:1

2013+ 32.47 crawl ratio...............Can you see the trend ??????????????

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Re: AC Main Blend Door

Post by AceMan » Fri Oct 26, 2018 10:13 pm

On my 2006, I had a warranty replacement for my blend door, well actually, the whole guts, in 2010. It's not like they can just reach down and replace the door or actuator, like in a older Grand Cherokee I had. And, I just got a new evaporator and heater core replaced a month ago. Yea, not sure why I did that!

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Re: AC Main Blend Door

Post by RustyPW » Fri Oct 26, 2018 11:26 pm

AceMan wrote:
Fri Oct 26, 2018 10:13 pm
On my 2006, I had a warranty replacement for my blend door, well actually, the whole guts, in 2010. It's not like they can just reach down and replace the door or actuator, like in a older Grand Cherokee I had. And, I just got a new evaporator and heater core replaced a month ago. Yea, not sure why I did that!
I might be looking at a evaporator and heater core too. When I was at the OBX beginning of the month. My A/C was blowing warm air. Took it in and had the system recharged. It had hardly any refridge left in it. :roll:
PWOC #53
2008 POWER WAGON RC
Mods to the PW; Nerffed Mopar RockRails, Wheel Well Liners, Bushwacker Pocket Fender Flairs, Garvmin dezl 560LMT GPS, Power Wagon Winch Kit, Line X Ultra Bed Liner, PIAA Headlight Bulbs, PIAA 580 Driving Lights (135 watt), PIAA 520 Fog Lights (135 watt), PIAA 520 ATP Off-Road Lights (135 watt), Locker Bypass, Modifed Rockcrusher Diff Covers, Mopar Utility Bed Rails and Tool Box, Warn Winch Wireless Remote Control, "el-cheapo" Inclinometer, Airaid CAI, Winch TPS Bypass, 35" Toyo's, Mopar Spare Tire Lock, 'T' Steering Linkage, Modifed PSC Steering Brace, P3 Brake Controller, Modifed Fusion "mall crawler" rear bumper , PIAA 1500 Back-Up Lights, 1Ton HEMI Tranny Cooler, Leer 100XR Bed Cap, Factory Tow Mirrors, CenterLine Rims 17x9-5.25 BS, Mag-Hytec Tranny Pan, AutoMeter Gauges, PSC Extreme Hydro Assist Steering, Carli G2 Track Bar, Carli Ball-Joints, Dynatrac FreeSpin Hubs, Snorkel, RCV Axles, EBC Pads & Rotors, Aluminess Front Bumper, 14,000 lb Pul-Pal, 60" Extreme Hi-lift Jack, and more riggin' equipment, Carli Long Travel Air Bags, Bilstein 7100 Shocks - Carli Valving, Carli Control Arms, Thuren 3" SoftRide Springs, Thuren Rear Shackles, MagnaFlow Muffler, Crown Stainless Brake Lines, MORE STUFF COMIN'.

Moab '10, '12, '14.
Rausch Creek Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18,
Russ NRA Benefactor Member

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Re: AC Main Blend Door

Post by AceMan » Wed Oct 31, 2018 9:55 pm

RustyPW wrote:
Fri Oct 26, 2018 11:26 pm
AceMan wrote:
Fri Oct 26, 2018 10:13 pm
On my 2006, I had a warranty replacement for my blend door, well actually, the whole guts, in 2010. It's not like they can just reach down and replace the door or actuator, like in a older Grand Cherokee I had. And, I just got a new evaporator and heater core replaced a month ago. Yea, not sure why I did that!
I might be looking at a evaporator and heater core too. When I was at the OBX beginning of the month. My A/C was blowing warm air. Took it in and had the system recharged. It had hardly any refridge left in it. :roll:
What sux is when you recharge it, and the leak is actually in the evaporator, the refrigerant then leaks out inside the cab. It's not too healthy. Since I'm keeping the truck, I figured I would get it fixed. LOL

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