SuiteSuccess Posted May 10, 2016 Report Share Posted May 10, 2016 I have two Dometic 630516.331 ac's in my trailer, the one in the living area with heat pump, the bedroom without. The thermostat is the Comfort Control Center (3109228.001). The living room AC (front) is blowing cool air but the fan will not shut off when on "auto". Bedroom working fine, fan cuts off on auto. Research on line says the relay board on the unit itself may be stuck open/closed? What and how can I check and any other possibilities or suggestions? Also can I just put the fan on "low or high" and continue to run since compressor appears to be working? 2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift Bed Build by "JW Morgan's Custom Welding" 2017 DRV 39DBRS3 2013 Smart Passion Coupe "Itty Bitty" "Don't go around saying the world owes you a living. The world owes you nothing. It was here first!" Link to comment Share on other sites More sharing options...
Wrknrvr Posted May 10, 2016 Report Share Posted May 10, 2016 If this unit has 5 buttons on the right side then turn the unit off. Push and hold both mode and zone buttons down and hold in place. Then turn the switch on. It should show FF. If it does then you have done as a system reset. If there is a EE then there is an electrical error. You can run with the unit on low or high fan. The unit should perform best on high fan as that gives most air move ment. As for the fan not cycling on and off on temperature there several things need checked at your unit while you are using it. Temperature, humidity and how far temperature drop you are trying to achieve. Hopefully this will give some help on your problem, Vern Link to comment Share on other sites More sharing options...
Ronbo Posted May 10, 2016 Report Share Posted May 10, 2016 You can also flip the breaker and pull the fuse for the thermostat to reset the system. Ron C. 2013 Dynamax Trilogy 3850 D3 2000 Kenworth T2000 Optimus Prime Link to comment Share on other sites More sharing options...
Nuke-E Posted May 10, 2016 Report Share Posted May 10, 2016 Carl, If the fan relay is sticking, what mode the thermostat is in really won't matter. But you're not likely doing any harm at all by continuing to run that way. I've had a sticking relay on both of my air conditioners for several years--the back one's compressor would stick on when the blower shut off (which didn't sound good at all--the compressor was under heavy load, but fine once the water was drained out of the control box). The one on the front air conditioner's blower will occasionally not come on (same sound). A closed fist to the ceiling has fixed it every time, and both problems tend to occur in high humidity. I'm just biding my time until I replace it all with something better. You could check to see whether power is still being applied to the relay coils to narrow it down to either the relay or the thermostat. Stop by on your way south from Cincinnati and we should be able to figure it out. 45' 2004 Showhauler -- VNL300, ISX, FreedomLine -- RVnerds.com -- where I've started to write about what I'm up to Headlight and Fog Light Upgrades http://deepspacelighting.com Link to comment Share on other sites More sharing options...
rickeieio Posted May 10, 2016 Report Share Posted May 10, 2016 Carl, <snip> Stop by on your way south from Cincinnati and we should be able to figure it out. Cincinnati? And he didn't call to go to lunch? I'm only 20 minutes west of downtown Cincy. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio@yahoo.com Link to comment Share on other sites More sharing options...
Nuke-E Posted May 10, 2016 Report Share Posted May 10, 2016 Cincinnati? And he didn't call to go to lunch? I'm only 20 minutes west of downtown Cincy. I thought that's what the plan was at some point--not sure when. 45' 2004 Showhauler -- VNL300, ISX, FreedomLine -- RVnerds.com -- where I've started to write about what I'm up to Headlight and Fog Light Upgrades http://deepspacelighting.com Link to comment Share on other sites More sharing options...
SuiteSuccess Posted May 10, 2016 Author Report Share Posted May 10, 2016 Rick, We are at Little Farm on the river with Gail and Steve Dixon. Just got in last night. Steve was speaking of giving you a call. 2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift Bed Build by "JW Morgan's Custom Welding" 2017 DRV 39DBRS3 2013 Smart Passion Coupe "Itty Bitty" "Don't go around saying the world owes you a living. The world owes you nothing. It was here first!" Link to comment Share on other sites More sharing options...
SuiteSuccess Posted May 10, 2016 Author Report Share Posted May 10, 2016 Thanks Vern, Ron, David for the help. 2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift Bed Build by "JW Morgan's Custom Welding" 2017 DRV 39DBRS3 2013 Smart Passion Coupe "Itty Bitty" "Don't go around saying the world owes you a living. The world owes you nothing. It was here first!" Link to comment Share on other sites More sharing options...
rickeieio Posted May 10, 2016 Report Share Posted May 10, 2016 Carl, I have a zoning meeting tonight, but as far as I know, I'm totally open tomorrow. I believe Susan is as well. My cell is 513-284-6927. One of our farms is less than a mile from you. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio@yahoo.com Link to comment Share on other sites More sharing options...
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