RV.Net Open Roads Forum: Can AUTO mode damage A/C from frequent shutdowns?

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Can AUTO mode damage A/C from frequent shutdowns?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev
Sponsored By:
Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 08/01/20 09:08am Link  |  Quote  |  Print  |  Notify Moderator

Fan in the on position is good because the air is constantly moving and not having to cool down the ducts when kicking on. I leave my fan in the ON position it gives more even temps.


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 08/01/20 09:43am Link  |  Quote  |  Print  |  Notify Moderator

cavie wrote:

3 tons wrote:

Perhaps member Doug can enlighten us a bit more, but from what I know about my Coleman Mach 1, regardless of the fan mode, etc. once the compressor cycles to Off there is a 3 min time delay before the compressor can restart again, this to allow time for the high-side of the compressor to equalize (or bleed down) to the low-side, however can’t say whether this attribute is driven by the air conditioner or by the t-stat...

3 tons


the time delay starts when the uni has been TURNED OFF. it will not try to cycle it's self in just 3 min. if you turn it off or the power goes out it will not restart for ten min. not 3.


Where do you get this 10 minute delay? I constantly in service shut power OFF or turn the AC OFF and never have had a 10 minute delay. Doug

From Dometic.

. Compressor Time Delay
A time delay of approximately 2 minutes occurs any time the compressor is required
to begin the cooling or heat pump cycle.

* This post was edited 08/01/20 09:55am by dougrainer *

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 08/01/20 09:49am Link  |  Quote  |  Print  |  Notify Moderator

kellem wrote:

Perhaps I misunderstand but never heard of AC adjusting fan speed on its own.

Ours is as follows.
High constant
Low constant
Auto high
Auto low.


Depends on the system. Dometic, on AUTO, the AC compressor is ON and if more than 5 degrees diff, the HI fan will come on. Once the AC gets closer or less than that 5 degree, the Fan will "shut" of for a second and then restart on LOW and once temp is reached will shut both Compressor OFF and the Fan OFF. From your desciption, you have a RVP(Coleman) wall tstat. And yours operates as you state. This is for the LCD Coleman tstat. Doug

Set Fan Speed for Cooling Mode
1. Place the slide switch in the COOL position.
2. Pressing the MODE button will toggle through the available speeds.
• “COOL AUTO” setting allows the speed to vary depending on the cooling needs which
is the default setting.
• “COOL HIGH” or “COOL LOW” setting will set the fan speed to run continuously at high
or low, but the upper unit will cycle when cooling is needed.
• “FAN HIGH” and “FAN LOW” setting will set the fan to run continuously at high or low
speed. The upper unit will not run to produce cooling. Setpoint is not adjustable in this
mode.


dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 08/01/20 09:53am Link  |  Quote  |  Print  |  Notify Moderator

This is for Dometic that have 3 speed fan. Doug

A. Auto Fan
When “AUTO” fan is selected, the fan speed will vary depending on the difference
between the temperature set-point and the room temperature. In “AUTO” fan, the
compressor and fan will cycle ON and OFF with the thermostat.
When the difference is:
8 °F / °C or more The fan operates on HIGH
5 to 7 °F / °C The fan operates on MED
4 °F / °C or less The fan operates on LOW

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev

Open Roads Forum  >  Tech Issues

 > Can AUTO mode damage A/C from frequent shutdowns?
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.