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RVFun4Us
10-27-2019, 10:41 PM
OK Heartlanders, another puzzle to solve. DW told me the furnace was on but blowing cold air. Well, just switched tanks a couple of days ago (we always keep one full and manually turn lever when one is empty). Up until today, the furnace was working fine with that door side tank. Looked at the propane gauge and it showed green for that tank (doorside). I took the tank out and could tell it had plenty of propane left. So put it back in, came in and tested the stove to see if it would light. It was minimal at first, but then the burners returned to normal. So I switched one tank for the other to see if it was a tank issue. Had same problem. The off-door side works fine with either tank when the furnace is on. The door side does not but still functions with the stove. So I am guessing it is a flow issue on the door side (has a round red plastic propane regulator in-line there). Haven't tried the refrigerator or water heater on propane using door-side bottle (usually run these on electricity). So what do you all think? I saw a post from last year indicating something similar and suggested replacing the hose and I guess the plastic regulator on the door side. Does this point to a clogged or partially clogged hose or regulator? Worked fine this morning, not this afternoon. Thanks for your input.

danemayer
10-27-2019, 10:45 PM
I believe you've diagnosed it correctly. Replace the doorside regulator and pigtail.

It's possible there could be a problem at the dual regulator on the other side, but that's less likely.

Lynn1130
10-28-2019, 09:50 AM
Those seem to go out on a regular basis. I think I have replaced 3 so far.

WillyBill
10-28-2019, 11:42 AM
One other thought? How cold was it last night? My Cyclone will not always light when it gets down to the low-Mid 20"s - usually happens in the wee hours. If there is ice on the outside of the bottle when the unit doesn't fire, the problem may just be low propane pressure due to temperature. I found help with the issue by putting valve selector in the "Both" position so it runs off of two tanks and that seems to get the bottle pressure up enough that it stopped the "Failure to fire" issue. I haven't tried the bottle heater option yet because I don't do enough camping in really cold temps - yet LOL. Just a thought?

WB

RVFun4Us
10-28-2019, 11:48 AM
One other thought? How cold was it last night? My Cyclone will not always light when it gets down to the low-Mid 20"s - usually happens in the wee hours. If there is ice on the outside of the bottle when the unit doesn't fire, the problem may just be low propane pressure due to temperature. I found help with the issue by putting valve selector in the "Both" position so it runs off of two tanks and that seems to get the bottle pressure up enough that it stopped the "Failure to fire" issue. I haven't tried the bottle heater option yet because I don't do enough camping in really cold temps - yet LOL. Just a thought?

WB

Actually happened in mid afternoon with temps in the 60s.

RVFun4Us
11-01-2019, 12:18 AM
OK, changed out the door-side regulator and the pigtail. Still have same problems. Off-door side works for furnace operation, door-side still does not work with furnace. Fan comes on but just blowing cold air. Stovetop works from either side, refrigerator appears to work on propane fine from either side. But furnace does not work from door-side. When I flipped the tanks, the problem still existed. So now what? Looking for any other ideas.

danemayer
11-01-2019, 06:17 AM
You'll probably have to start changing parts on the off-door-side.

One year I had a bit of oil built up in the hose coming out of the dual regulator. On ours, that hose goes down, and loops back up where it connects to iron pipe. I was running out of things to replace and when I disconnected that hose and blew air through, some oil came out. The oil was creating a flow restriction.

RVFun4Us
11-01-2019, 11:01 AM
You'll probably have to start changing parts on the off-door-side.

One year I had a bit of oil built up in the hose coming out of the dual regulator. On ours, that hose goes down, and loops back up where it connects to iron pipe. I was running out of things to replace and when I disconnected that hose and blew air through, some oil came out. The oil was creating a flow restriction.

Thanks Dan. Also tried the water heater on both tanks and it worked fine with good gas flow. So the furnace seems to be the main problem. Does it require more gas flow than the refrigerator or water heater? Will try the furnace one more time this morning on the door side tank. If that doesn't work, will try blowing out the line between the off-door side to the door side. If nothing is wrong there, then my last guess is the off-door side regulator and replacing that. Guess the worst case in replacing parts is that you have extras if or when I have another issue.

danemayer
11-01-2019, 11:10 AM
The furnace uses more propane than the refrigerator or stove. I think the Onan generator requires even more.

Disconnect the hose at both ends before blowing it out. And I would blow out the hose coming off the dual regulator before buying a new regulator.