DaSu
St. Cloud Mn.
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Joined: 08/30/2005
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We have a Jayco , which is suppose to be a good make . We've had a few problems , but so far not bad . My question on the furnace in this 40-50 degree morning weather is , why does the furnace cycle so much ? Off for about 4 minutes and then back on . We do not run it all night so the walls of the RV may be cold and Iam thinking the furnace heats the thermostat to desired setting and shuts down , then cooler air from walls and furniture cool down coach and promps thermostat to call for more heat . Is there something wrong here , should we leave furnace run(set at 70) all night to correct this problem ? Our upper bedroom only has one heat vent , does yours? The bed room is much cooler then the rest of the coach . Thanks
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pinesman
virginia
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Joined: 08/21/2006
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Although not a Jayco, ours has a vent right under the thermostat so the thermostat heats up rather quickly. I went to Lowes and got a vent which has directional louvers on it so I can direct the air away from the thermostat. It does not cycle nearly as often now.
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Dr Quick
M'boro, Tn
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You may have the correct answer in that thermostat gets satisfied then cold surfaces in trailer cool air down and it will come on again.
Check to see where you thermostat is located, if it is near an air outlet, that may cause it to short cycle. Mine did that as the register was below thermostat. I taped a 3X5 card below the thermostat so that it projected from the wall to keep direct air off thermostat. It cycles a lot better now.
Dr quick
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tomman58
Southeast Michigan
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Try tossing a rug over the closest vent and see what happens. Ours (as below) sometimes in the morning cycles, I normally get up and turn it up to 68 as it's generally about time for me to rise.
I am going to use a small heater this year and that may make a difference also.
The last option is to put in a programable thermostat. Method of install is in search on this forum.
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DaSu
St. Cloud Mn.
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Dr Quick wrote:You may have the correct answer in that thermostat gets satisfied then cold surfaces in trailer cool air down and it will come on again.
Check to see where you thermostat is located, if it is near an air outlet, that may cause it to short cycle. Mine did that as the register was below thermostat. I taped a 3X5 card below the thermostat so that it projected from the wall to keep direct air off thermostat. It cycles a lot better now. Our Thermostat is located on the wall about center of coach above the stairs and on the inside wall . I even thought maybe some warm air was commimg up the wall , from the furnace area , heating up the thermo and shutting down . I have felt the inner wall and it did not feel too much warmer . No vent is closely related to thermo . Just wondering how many others deal with this small but annoying on off problem and thier solutions .
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enblethen
Moses Lake, WA USA
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You may want to check the anitcipator in the thermostat. This is a small slide resistance strip. By moving it slightly up or down changes how much your furnace runs. Most need to be set around ".80" on the scale. Closer to 1.00, the more the furnace runs.
Page 3 at this website has the small round style anticipator.
http://www.white-rodgers.com/wrdhom/pdfs/instruction_sheets/Retail/0037-6196.pdf
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downtheroad
Puget Sound
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Joined: 02/18/2003
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All good suggestions from the above posters.
Also consider switching your stock thermostat out for a digital one as many of us have.
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skipnchar
Topeka Kansas USA
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I agree with Dr Quick about the location. Check the location of heat vents in comparison to the thermostat. Our thermostat is located just on the living room side of the bathroom door (walk through bathroom) and the closest heat vent is just INSIDE of the bathroom door. Our furnace will act just as you describe if it's turned on and the bathroom door is left open but closing the door makes it cycle normally. Might just be that one of your vents is directing warm air directly at the thermostat and causing it to cycle off too quickly.
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Mile High
Lone Tree, CO
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I had similar issues with a prior rig that used the Atwood Hydro Flame Excalibur series. It was if the manufacturer really tried to expand on the heat recovery fan cycle that tries to take advantage of residual heat in the ducts that just isn't there on an RV. Mine would continue to blow until cold air cooled the rig back down. The cycle would start over in less than a minute. Sometimes the fan never shut down, just the burner would cycle.
Drove me crazy - never found a fix. We did change out the thermostat on that one, but it didn't do the trick for us.
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shum02
Burlington ON CDA
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If the wall is hollow that it is mounted on and it probably is cold air from behind the wall or even warm air can be affecting the back of the thermostat. Take it off the wall and plug the hold with pink insulation or self expanding latex foam.
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