Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-08-2009, 08:17 PM   #1
Winnebago Camper
 
Join Date: Aug 2006
Location: Woodstock, GA
Posts: 30
Dash AC does not blow cold

Sorry to beat a hot dead horse, again.
2005 Itasca Horizon KD.
When I turn on Max A/C or just A/C, the blower turns on, I feel air movement, but no cold air.
I've read about the thermocouple, but in this case, the A/C compressor in the engine compartment does NOT spin when the front dash knob is set to A/C or Max A/C.
I think it's a fuse, but I cannot find a 12VDC fuse for the dash A/C.
I've looked in the external compartment under the drivers side, under the dash, in the power cord bin where the inverter resides and under the bed in the rear of the coach. The coach basement air works great.
Would anyone know where I might find it or have any other suggestion?
Thanks
Keith Anderson
__________________
Keith A
2014 Winnebago Journey
Keith Anderson is offline   Reply With Quote
Old 06-08-2009, 08:34 PM   #2
Winnebago Owner
 
CC38EL's Avatar
 
Join Date: Aug 2002
Location: McCordsville
Posts: 216
I don't know if you have the Cat or the Cummins, but I had a similar situation. On my Cummins 8.3L ISC, the air conditioning compressor sits on the upper right of the accessory mount. It has ONE (1) wire going to it that has a connector about 8 inches down from the assembly. As a matter of fact, it's the ONLY wire I can see.

That connector corrodes and causes the compressor to not engage. I clean it about every 4 months or so and the air conditioning runs fine.

I also serviced my air conditioning with a do it yourself kit and put in air conditioning oil and freon.

You can get automotive kits that work on your coach.

Hope your solution is as simple as mine.
__________________
Jim

2017 Cedar Creek 38EL/2015 Silverado 3500HD
CC38EL is offline   Reply With Quote
Old 06-08-2009, 08:54 PM   #3
Winnebago Camper
 
Join Date: Aug 2006
Location: Woodstock, GA
Posts: 30
It's a Cummins 8.3L ISC also. We haven't had any problems with the dash A/C in the 3 years/25,000 miles that we've been driving, so I'll look at this first. It's always hard for me not to think the worst first and to keep it simple.
Thanks and I'll let you know.
__________________
Keith A
2014 Winnebago Journey
Keith Anderson is offline   Reply With Quote
Old 06-09-2009, 05:47 AM   #4
Winnebago Owner
 
CC38EL's Avatar
 
Join Date: Aug 2002
Location: McCordsville
Posts: 216
Another thing to check, once you get your air conditioning compressor going, are the air conditioning condensor fans mounted to the outside of your radiator.

We went a long time without using the dash a/c. Those fan bearings seized up and when I did get the compressor working, I then had to replace the fans.

They are common electric radiator cooling fans and run about $65-85. If you need to replace them. Hopefully you won't have to.
__________________
Jim

2017 Cedar Creek 38EL/2015 Silverado 3500HD
CC38EL is offline   Reply With Quote
Old 06-09-2009, 08:27 AM   #5
Winnebago Camper
 
Join Date: Jun 2008
Location: Jasper,In
Posts: 30
Your compressor will not run if your pressure in your system is low. If you get too much freon you will blow a line some place. Check your pressure first and check for leaks. good luck Jim
__________________
Retired farmer who started with nothing and have most of it left.
Rudolph is offline   Reply With Quote
Old 06-15-2009, 10:17 PM   #6
Winnie-Wise
 
Join Date: Aug 2004
Posts: 354
Hi Keith~ The high pressure freon line my be burned. Check the AC hose line in the engine compartment. My hose was too close to the turbo and the line was burnt. The AC tech installed a splice couple and recharged the line. I resecured the line and have enjoyed AC for several years. good luck.
Gary CA is offline   Reply With Quote
Old 06-15-2009, 10:58 PM   #7
Winnebago Camper
 
Join Date: Aug 2006
Location: Woodstock, GA
Posts: 30
I'll check the AC line, but I think it's getting time to take it in to be looked at. I cleaned all of the connectors, (which weren't dirty or corroded), and looked the best I could in the engine compartment at the compressor, but it's pretty far back. I may need to acces the engine from the bedroom.
Thanks again for the suggestions and please keep them coming. I've got a couple of weeks before I bring it in.
__________________
Keith A
2014 Winnebago Journey
Keith Anderson is offline   Reply With Quote
Old 06-16-2009, 03:51 AM   #8
Winnebago Owner
 
Join Date: Nov 2001
Location: Santa Clara,CA. USA
Posts: 60
Just had mine serviced, Freightliner said it was a blown compressor, so took it to my local mechanic and they replaced a"shrader" valve and said it shoul be good to go. Will wait for Global Warming to kick in so I can test it.

Don, WIT 70041
DonGee is offline   Reply With Quote
Old 06-16-2009, 06:30 AM   #9
Winnebago Camper
 
Dmiles's Avatar
 
Join Date: May 2009
Location: Suffolk, VA
Posts: 39
I have the same problem, it's just that we never use the dash air. I didn't even know it wasn't working until I took it in for a state inspection and the mechanic just happened to try it out. I think he was trying to drum up more business, but at their labor rates I told him to just stick to the things that will keep me from getting my inspection sticker.

I did a little investigation, and if I short the contacts on the high pressure switch, the compressor kicks in, so I'm thinking it needs a freon recharge, but of course also probably has a leak somewhere. If we actually used it, I would put some time into it but since we don't it will probably wait until off-season.
__________________
2011 Winnebago Vista 30W
Duane, Precy, 9 year old son Matt, and Abby, our American Eskimo.
Dmiles is offline   Reply With Quote
Old 06-17-2009, 05:58 PM   #10
Winnebago Camper
 
Join Date: Aug 2006
Location: Woodstock, GA
Posts: 30
Is the high pressure switch at the front of the RV or in the engine compartment?
Could you please describe it's size and how many wires are connected to it?
Thanks
__________________
Keith A
2014 Winnebago Journey
Keith Anderson is offline   Reply With Quote
Old 06-18-2009, 07:11 PM   #11
Winnebago Camper
 
Dmiles's Avatar
 
Join Date: May 2009
Location: Suffolk, VA
Posts: 39
Quote:
Originally Posted by Keith Anderson View Post
Is the high pressure switch at the front of the RV or in the engine compartment?
Could you please describe it's size and how many wires are connected to it?
Thanks
On my rig, as you lower the "hood" on the front of the RV, it's to the left and just below the radiator cap. It has 2 wires, one green and one black, or dark brown.
__________________
2011 Winnebago Vista 30W
Duane, Precy, 9 year old son Matt, and Abby, our American Eskimo.
Dmiles is offline   Reply With Quote
Old 06-19-2009, 07:12 AM   #12
Winnebago Owner
 
CC38EL's Avatar
 
Join Date: Aug 2002
Location: McCordsville
Posts: 216
Keith,

If you look on passenger side (more towards the center) of your vehicle where generator is, you'll see a big black box - toward the right of the box you'll see two A/C lines...one is small hose, one is large
hose...small hose is high side, the big hose is low side....that's where you fill your A/C. Should have access ports with colored caps.

In the small hose is where you'll find your pressure switch. Should have 2 wires going to it.

See if this helps finding that switch.
__________________
Jim

2017 Cedar Creek 38EL/2015 Silverado 3500HD
CC38EL is offline   Reply With Quote
Old 07-23-2009, 10:55 PM   #13
Winnebago Camper
 
Join Date: Aug 2006
Location: Woodstock, GA
Posts: 30
Well, I took it in and the culprit was the "Pressure Cycling Switch", which I think is the same as the thermistor. The part was $21.27 and the labor was 1 hour to diagnose at 54.50/hr and 5 hours to replace it at $109/hr for a grand total of $620.77. Ouch, but I'm cool. Thanks for everyone's help and input.
__________________
Keith A
2014 Winnebago Journey
Keith Anderson is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ford V10's Blow plugs? Bob Witt General Maintenance and Repair 9 09-05-2013 01:35 PM
35J Tire Pressure (had a blow out) Belgique Running Gear, Axles, Brakes, Wheels and Tires 24 01-11-2011 08:06 AM
Dash Air Will Not Blow Cold Wayne M General Maintenance and Repair 12 02-12-2009 05:48 AM
Cold Weather Camping.....No, Really Cold Weather Camping arkaussie Campgrounds, Travel and Attractions 14 03-08-2007 02:44 PM
Building a Blow out Plug from off the shelf parts JD Allen General Maintenance and Repair 11 11-28-2005 08:07 PM

» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 02:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
×