Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 07-14-2015, 05:21 PM   #1
Senior Member
Alpine Owners Club
Join Date: Sep 2014
Posts: 267
Blog Entries: 1
Air conditioner/Front

Our front air conditioner seems like it doesnt want to turn off. We have it set on 79 and it will run all day long and the fan is set to auto so it not the fan running all the time cause it is blowing cold air. And we do get cold with it set at 79. The back ac cycles on off like it should. If anyone has any idea what might be the problem your help would be most appreciated. Not sure if it would be the thermostat or not or a sensor.

Dennis & Brenda
2006 Alpine Coach 40Fd Limited
2014 Cadillac Srx
dennismhamm is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-14-2015, 07:13 PM   #2
Junior Member
Join Date: Jul 2015
Posts: 16
You describe the Fan as set to Auto. Please clarify your problem. Do the compressor and the fan both stay on continuously? Slowly raise the thermostat. The fan and the compressor should both turn off.

turn the A/C off at the thermostat. Does everything turn off? Set the Fan to manual, does it run by itself (no compressor)?

You should have some idea of what is wrong by now.

Billfish636 is offline   Reply With Quote
Old 07-14-2015, 08:03 PM   #3
Senior Member
bcbowers's Avatar
Alpine Owners Club
Join Date: Mar 2009
Location: Surprise, AZ
Posts: 570

My front AC has always run more than the rear.

I believe one reason for the rear turning off & on more frequently is that the sensor in the rear is really close to the duct outputs. The output ducts are all fairly close to the return (relatively speaking). We close the closest duct to get a little more accurate performance. Keep in mind that the rear area is quite smaller than the front.

The sensor for the front AC is mounted on the wood side board above the DS chair. The sensor should also have some insulation taped across the back side to prevent inside or outside temp influences (that sensor is close to the DS window!). We never set the AC below 80 because the DW thinks it's too cold. We also use a weather station inside which displays the inside temperature as well as the outside. If it''s really hot outside (even inside our garage at 110+) they will both run pretty much full time. Eventually they will start cycling when the outside temps gets down to about 100 or below.

Also, the AC units will shut off the compressor but keep the fan going when reaching target temperature. If the temperature starts to rise with just the fans running then the compressor will come back on with the fans continuing to run. I have to listen carefully to hear the compressor shut off since the fan still makes plenty of noise. We changed the return vents to "baffles" manufactured by Classic Coach Works in Lakeland, FL to reduce noise & increase efficiency. Helps a little.

Do as bill suggested and slowly raise the target temp setting to determine at what point they turn off.
Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude
bcbowers is offline   Reply With Quote
Old 07-15-2015, 07:25 PM   #4
Senior Member
Koop's Avatar
Join Date: Dec 2012
Location: Full Timing
Posts: 739
The temp sensor locations make the dual temperature settings on the thermostat tricky on our Duo-Therm 15,000 BTU units. The rear sensor is close to the air duct and cools quickly. The front sensor is on the driver side above the side window and is easily heated by sunshine and ambient air influencing the reading to the thermostat.

So, I set the thermostat for the rear to a much colder than desired temp to keep the AC on long enough to reach the desired temp and the front thermostat to a higher than desired reading to allow the AC to cycle at a comfortable temperature.
2003 Alpine Coach 40MDTS - 400HP Cummins ISL
Can Am Spyder Roadster
Koop is offline   Reply With Quote

air conditioner

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
2002 MADP Air leak Spk64 Newmar Owner's Forum 5 07-13-2015 04:55 AM
Freightliner chassis M2 Biz class truck/RV No rear AIR Bag AIR ! Chatham Freightliner Motorhome Chassis Forum 4 06-26-2015 06:18 AM
Manually inflating air bags - Leaking front manifold? customfab Country Coach Owners Forum 14 09-25-2014 09:18 PM
Air Bag Valving Leaking? customfab iRV2.com General Discussion 3 09-24-2014 07:28 AM
Fill air tanks by alternate means Terry W. Fleetwood Products Owner's Forum 1 07-05-2014 02:13 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:47 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.