 |
06-27-2014, 03:51 PM
|
#1
|
|
Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Posts: 207
|
A/C clicking sound while adjusting thermostat
What is happening to my front a/c unit? As temperature reaches set point the A/C turns on and off rapidly.
Also when I move the thermostat setting above the current temperature, the A/C makes scratching sound as I slide the temperature back and forth above the set point
Sam
2004 8321 LX WH
__________________
Sam Leonard
2004 National Seabreeze 8321LX
W-22
|
|
|
 |
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!
|
|
06-27-2014, 07:10 PM
|
#2
|
|
Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Scottsdale, AZ
Posts: 1,502
|
Front A/C? dash or roof top?
__________________
2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..
|
|
|
|
|
06-27-2014, 07:23 PM
|
#3
|
|
Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Posts: 207
|
Roof top a/c has electronic clicking when sliding thermostat temp
Also rapid stops and starts when hits the temperature set on thermostat
__________________
Sam Leonard
2004 National Seabreeze 8321LX
W-22
|
|
|
|
|
06-28-2014, 05:34 AM
|
#4
|
|
Senior Member
Join Date: Nov 2009
Posts: 2,043
|
Does your unit have one or two ACs?
Are both controlled from the same wall thermostat?
If so, does the other AC experience the same behavior?
If not, does this same thermostat control your furnace? Does the furnace exhibit the same clicking when sliding the temp control up/down?
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
|
|
|
|
|
06-28-2014, 05:40 AM
|
#5
|
|
Senior Member
Join Date: Sep 2012
Posts: 4,232
|
The clicking is relays engaging and disengaging.
Why it's doing that requires more info.
|
|
|
|
|
06-28-2014, 07:39 AM
|
#6
|
|
Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Posts: 207
|
Just one unit on each thermostat
What has changed is that the a/c is reacting to the thermostat movement even though the temperature is set above the room temperature. It makes electrical cracking sounds
Also the a/c is turning on and off rapidly when it reaches the set point
My guess is it may be low on freon but I don't know if these roof units can be serviced
__________________
Sam Leonard
2004 National Seabreeze 8321LX
W-22
|
|
|
|
|
06-28-2014, 07:48 AM
|
#7
|
|
Senior Member
Join Date: Nov 2009
Posts: 2,043
|
I'll ask again... is your furnace on the same thermostat? Does it react in the same way? I'm trying to determine if your thermostat is bad or if something is amiss on the cooling unit.
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
|
|
|
|
|
06-28-2014, 09:32 AM
|
#8
|
|
Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Posts: 207
|
Yes the furnace is on this thermostat but it seems to run fine.
The a/c works fine if I set it well below desired temp but when it finally reaches that temp it cycles rapidly on and off like every 5 to 10 seconds
__________________
Sam Leonard
2004 National Seabreeze 8321LX
W-22
|
|
|
|
|
06-28-2014, 09:40 AM
|
#9
|
|
Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Scottsdale, AZ
Posts: 1,502
|
My first thoughts: loose connection at thermostat(easy to check) or thermostat.
__________________
2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..
|
|
|
|
|
06-28-2014, 09:40 AM
|
#10
|
|
Senior Member
Join Date: Nov 2009
Posts: 2,043
|
Well the A/C doesnt know the difference in temps inside. It doesnt know or care about anything other than the thermostat telling it to turn on or off (and fan speed).
What if you let it run for 10 minutes or so then physically adjust the temp yourself to make it shut off... does it chatter then?
What if while it's running you simply slide the thermostat to OFF? Does it chatter then?
Im still trying to determine if the problem is in the A/C controls or in the thermostat.
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
|
|
|
|
|
06-28-2014, 02:51 PM
|
#11
|
|
Senior Member
Workhorse Chassis Owner
Join Date: May 2009
Posts: 207
|
All tight in thermostat 5 wires with small screws all tight
__________________
Sam Leonard
2004 National Seabreeze 8321LX
W-22
|
|
|
|
|
06-28-2014, 04:27 PM
|
#12
|
|
Senior Member
Join Date: Sep 2012
Posts: 4,232
|
Quote:
Originally Posted by Samflhomes
All tight in thermostat 5 wires with small screws all tight
|
You can still have a bad t-stat. You would need a volt meter, or at least a test light to confirm it is not intermittent internally.
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
