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01-09-2017, 03:00 PM
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#1
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Senior Member
Join Date: Dec 2014
Posts: 102
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Extend a stay propane kit
Hello folks I have a 2015 class C last summer I installed a extend a stay propane kit. Because I use my unit in the winter as well I live in the north east so it's been cold where I am and I used up the house propane tank. So I went outside turned off the house propane knob and then opened the knob on the new tank the heat seemed to come on and ran for a bit but then late at night my unit got cold the furnace never turned on I figured my batteries were low they were not am I doing something wrong thank you for your help.
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01-09-2017, 05:01 PM
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#3
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Senior Member
Join Date: Dec 2014
Posts: 102
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I would say it got no lower than 6°
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01-09-2017, 05:44 PM
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#4
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Senior Member
Join Date: Sep 2012
Location: Tasmania now, USA/Canada/Alaska in April
Posts: 2,473
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Cooktop burners still work?
If you try the furnace again, does it again run for a while and then stop again.
Guess it could also be excessive moisture in the portable tank that is icing up the regulator.
Could try pouring reasonably warm water over the regulator and see if the propane flow improves.
__________________
Tony Lee - International Grey Nomad. Picasa Album - Travel Map
RVs. USA - Airstream Cutter; in Australia - MC8 40' DIY Coach conversion & OKA 4x4 MH; in Germany - Hobby Class C; in S America - F350 with 2500 10.6 Bigfoot camper
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01-09-2017, 08:20 PM
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#5
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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One of the problems with propane is . It is not always propane.
Was watching a TV re-run (Mr. ED) and the coronal's wife called it a BUTANE tank,, Two or 3 times..
What is the difference... The boiling point (Vapor temp) Propane is a vapor (Gas) almost all the way down to -40 (-30-something like 39 as I recall) Butane.. Closer to freezig (32F or 0C) .
S0. Why do I type this: Some dealers will fill you up with the lower cost BUTANE but charge for PROPANE thus generating maximum fraudlent profit.
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Home is where I park it!
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01-09-2017, 09:13 PM
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#6
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Senior Member
Join Date: Dec 2014
Posts: 102
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Yes burners still work
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01-09-2017, 09:17 PM
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#7
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Senior Member
Join Date: Dec 2014
Posts: 102
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When I try it again the furnace runs and keeps running does not shut off but is only blowing cold air
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01-09-2017, 09:24 PM
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#8
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Senior Member
Join Date: Dec 2014
Posts: 102
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I don't think it's a problem with the propane freezing I had the house tank refilled and that is working I am only having a problem with the extend a stay and the extra tank
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01-09-2017, 10:33 PM
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#9
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Senior Member
Join Date: Jun 2016
Location: SW Louisiana
Posts: 9,198
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The external extend-a-stay portable tank has less surface area to for propane to boil off of than your main tank. As temperatures drops you need a larger and larger surface area to boil off enough propane to meet the relatively high flow requirements of your furnace. Also as propane boils off it cools the tank (this is why a BBQ propane tank may ice up on the outside on a summer day if used with a high flow burner, you can also see this happen with most small 1 pound disposable propane tanks) , the smaller the tank is the harder it is for it to dissipate this cold, if it is too small or it is too cold outside the propane then freezes up. (this is the same gas law theory as air conditioners use to work)
This sort of problem is seen fairly often when people install home standby generators using under-sized propane tanks in colder climates, everything worked fine in the summer when it was installed, but wait for that record cold winter night and a power outage. Then the generator starts up and after a few minutes will not maintain a load and dies, as the propane tank freezes up but will restart and run again after an hour or so after the tank thaws enough to boil off another burst of propane, repeat.....
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01-11-2017, 07:35 PM
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#10
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club Mid Atlantic Campers
Join Date: Mar 2015
Location: Frankfort, Ky
Posts: 154
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OP did not state how large a slave tank he had so icing may not be problematic. I have a 120 gal tank alongside.
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'94 Pace Arrow 33X, 454 7.4L; '05 Jeep G. C. LTD
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01-12-2017, 01:48 AM
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#11
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Senior Member
Join Date: Dec 2014
Posts: 102
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My extra tank is only 30 gallons
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01-12-2017, 08:43 AM
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#12
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Senior Member
Join Date: Mar 2015
Posts: 2,984
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Quote:
Originally Posted by on2thenext
When I try it again the furnace runs and keeps running does not shut off but is only blowing cold air
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Put a thermometer on one of the heat outlets and let the furnace run 5-10 minutes. What is the measured temperature?
__________________
'04 Newmar Mountain Aire 4016
400ISL/Freightliner
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