I bought a 2017 EXISS stock combo with a 10 ft. living quarters and the Furnace will not warm the trailer up when it down below 50. We tool a trip this spring hit some cold wheather down in the 40 and furnace quit running about 2 in the morning.had a hard timing to get running this happen twies on this trip. talk to Siera about this since we no longer have a dealer close by. took to RV. dealer they told me the battery was dead.You do not want to know what I had to say. told me the Furnace was fixed. took a nother 6 week trip hit cold wheather on way home same thing happen. We got home sent a E Mail to tom Blessing at Siera did not hear any thing . Sent 3 more did not hear any thing . Caller EXISS got a hold of Dinnes Eagel told him my problem with Siera. By that after noon Tom Blessing called me I ask him if he got my e mail got all 4 e mails.He told me that I have an alumbion Trailer it takes a lot heat them.
Posted 2017-10-31 7:32 AM (#170785 - in reply to #170782) Subject: RE: Furnace
Did it warm up in the beginning of the trip? Do you have one battery or two batteries? Were they fully charged? Did your other propane fueled devices work (fridge, hot water heater, stove)? The stove doesn't need 110v or 12v to run. Depending on which fridge or hot water heater you may need voltage for them to run. If stove worked fine, then probably not a propane issue (regulator, air in the lines, tank turned off)
Try the heat with the trailer plugged into 110v. Does it heat the trailer? Doing this test would eliminate any battery issues (provided your converter is working properly and charging the battery(s).
My guess is that the battery(s) drained and there wasn't enough voltage to open up the thermocoupler to release gas to ignite. If you only have one battery and getting thru a day or two would be tough if you are using a lot of lights and it is very cold the voltage would drop below the threshold to open up the thermocoupler.
Posted 2017-10-31 5:26 PM (#170790 - in reply to #170782) Subject: RE: Furnace
I'm new on the forum, and appreciate your expertise.
But I will share my experience installing a portable heater of this type https://www.newtanklesswaterheaters.com/ in the trailer. Our unit is used for a parked trailer and shares a 7 gallon propane tank with the furnace and stove. Since I'm not the one living in the trailer I don't have any real sense of how often the tank is filled, how much of the use is the furnace vs. the water heater, etc. I do know that I was worried that it would use the propane a lot faster than the 6 gallon water heater that came with the trailer, but it doesn't seem to.
Posted 2017-11-03 8:25 AM (#170796 - in reply to #170782) Subject: RE: Furnace
Seems like maybe we need to identify the real problem here first. Is the furnace working? Does it come on, blow hot air, and cut off when temp is reached (if temp is reached)? I'm trying to figure out from your story, if it will not function, or if it functions but the trailer just will not get warm.
If it won't blow warm air, get to an RV shop and it is under the furnace maker's warranty. If it is working, but isn't warm then Sierra needs to help. But- a strong wind on a 40 degree day can cool a trailer a lot. LQs aren't underpinned of course, and windy weather makes a huge difference in how well heat is retained.
Posted 2017-11-10 9:39 PM (#170826 - in reply to #170782) Subject: RE: Furnace
Propane tanks are full set theromstat at 70. 45 inside trailer turn on to auto gas furnace come,s on fell heat coming out vent but it takes it 6 hr to get up to 68 and dose not shut off. I got a call.from siera to take it to nother rv diller on 11 22 17 if we are not snowed in . It is getting to be winter here in eastern Oregon.Hope they can fix it .
Posted 2017-11-11 9:35 AM (#170828 - in reply to #170782) Subject: RE: Furnace
Location: Rayne, LA
One way to see what is happening is to measure the temperature rise thru the furnace ( what is return air temperature versus the supply air temperature). Also does the burner cycle on and off on a cycle? This will tell you if it is cutting off on a limit.
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