Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 09-02-2012, 08:14 PM   #1
Senior Member
buck454's Avatar
Join Date: Jul 2011
Location: NorthEast Texas
Posts: 671
AC icing

I have read that in humid climate it is best not to run ac on low. Last night I noticed a drip from front ac vent. Since it was raining I was very concerned, but noticed I had set fan on low to cut down on noise and high was not needed. I set fan to high and it was not long until drip stopped yet rain continued during night. This afternoon it is very humid, fan is on high, but I am getting some drip again. Is there a fix? Is this a possible sign of low feon or possibly a clogged drain? Or both?

competitive shooter RVer
2006 Gulfstream Friendship G7 8411 400HP Cum.
RM Sterling/'07 Chevy Colorado CrewCab 4x4
buck454 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 09-02-2012, 08:33 PM   #2
Senior Member
Spikester's Avatar
Newmar Owners Club
Join Date: Aug 2007
Location: Belfair WA.
Posts: 678
Some brands of AC units had an icing sensor on the evaporator coils that was supposed to prevent freeze ups. Sometimes this sensor works it way loose from its mounting position causing what you are describing. If you can access your evaporator coils check to see if this may be the problem.


"Those who stand for nothing fall for anything"
2008 Newmar VTDP - 3330 - ISBXT 350 Spartan NVS
Toad - 2013 Mini Cooper S or 93 Nissan 4WD PU
FMCA F113720, NKK 18573
Spikester is offline   Reply With Quote
Old 09-02-2012, 08:44 PM   #3
Senior Member
KIX's Avatar

Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,579
Buck..........to answer your question dirty coils or obstructions like leaves, etc. could cause your problem.
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
KIX is offline   Reply With Quote
Old 09-02-2012, 09:20 PM   #4
Senior Member
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,867
Bill, it shouldn't leak inside. I think that has nothing to do with freezing.
It's humid in TX and our units are always throwing a stream of water off the roof - on low or high.

Dometics (Duo-Therm) have freeze sensors on the evaporator coil. It can be seen if you drop the cover.
cb1000rider is offline   Reply With Quote
Old 09-02-2012, 11:28 PM   #5
Senior Member
sc3283's Avatar
Join Date: Aug 2011
Posts: 1,126
buck, it may not be any issue at all...it may just be high humidity with a great working AC that is creating the vent to sweat. Is this vent a outlet vent? Is it made of metal? Metal will sweat worse than plastic vents in high humidity....but both will sweat
96 Dynasty 36' that does NOT wander, thanks to RuppParts.com and their superior "poly" suspension bushings
sc3283 is offline   Reply With Quote
Old 09-03-2012, 07:39 AM   #6
brookra1's Avatar
Join Date: Feb 2011
Location: Port Huron,Mi
Posts: 63
Had a similar problem with my roof air a couple of years ago. More dripping on low fan speed less on high. Did a couple of things to stop it, cleaned the coils and unplugged the drain holes. Insects like to build nests up inside the weep holes on the Domitic units. Took a long wire tie and rodded out the holes and everything was fine after that, no dripping hope that helps.

Rick & Alyce
04 40B Mandalay 350 Cat
brookra1 is offline   Reply With Quote

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

» 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 02:49 PM.

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